ext/libuv/include/uv.h in libuv-0.10.0 vs ext/libuv/include/uv.h in libuv-0.10.2

- old
+ new

@@ -1,2051 +1,2051 @@ -/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS - * IN THE SOFTWARE. - */ - -/* See http://nikhilm.github.com/uvbook/ for an introduction. */ - -#ifndef UV_H -#define UV_H -#ifdef __cplusplus -extern "C" { -#endif - -#ifdef _WIN32 - /* Windows - set up dll import/export decorators. */ -# if defined(BUILDING_UV_SHARED) - /* Building shared library. */ -# define UV_EXTERN __declspec(dllexport) -# elif defined(USING_UV_SHARED) - /* Using shared library. */ -# define UV_EXTERN __declspec(dllimport) -# else - /* Building static library. */ -# define UV_EXTERN /* nothing */ -# endif -#elif __GNUC__ >= 4 -# define UV_EXTERN __attribute__((visibility("default"))) -#else -# define UV_EXTERN /* nothing */ -#endif - -#include "uv-errno.h" - -#if defined(_MSC_VER) && _MSC_VER < 1600 -# include "stdint-msvc2008.h" -#else -# include <stdint.h> -#endif - -#include <sys/types.h> /* size_t */ - -#if defined(__SVR4) && !defined(__unix__) -# define __unix__ -#endif - -#if defined(__unix__) || defined(__POSIX__) || \ - defined(__APPLE__) || defined(_AIX) -# include "uv-unix.h" -#else -# include "uv-win.h" -#endif - -/* Expand this list if necessary. */ -#define UV_ERRNO_MAP(XX) \ - XX(EACCES, "permission denied") \ - XX(EADDRINUSE, "address already in use") \ - XX(EADDRNOTAVAIL, "address not available") \ - XX(EAFNOSUPPORT, "address family not supported") \ - XX(EAGAIN, "resource temporarily unavailable") \ - XX(EAI_ADDRFAMILY, "address family not supported") \ - XX(EAI_AGAIN, "temporary failure") \ - XX(EAI_BADFLAGS, "bad ai_flags value") \ - XX(EAI_CANCELED, "request canceled") \ - XX(EAI_FAIL, "permanent failure") \ - XX(EAI_FAMILY, "ai_family not supported") \ - XX(EAI_MEMORY, "out of memory") \ - XX(EAI_NODATA, "no address") \ - XX(EAI_NONAME, "unknown node or service") \ - XX(EAI_SERVICE, "service not available for socket type") \ - XX(EAI_SOCKTYPE, "socket type not supported") \ - XX(EAI_SYSTEM, "system error") \ - XX(EALREADY, "connection already in progress") \ - XX(EBADF, "bad file descriptor") \ - XX(EBUSY, "resource busy or locked") \ - XX(ECANCELED, "operation canceled") \ - XX(ECHARSET, "invalid Unicode character") \ - XX(ECONNABORTED, "software caused connection abort") \ - XX(ECONNREFUSED, "connection refused") \ - XX(ECONNRESET, "connection reset by peer") \ - XX(EDESTADDRREQ, "destination address required") \ - XX(EEXIST, "file already exists") \ - XX(EFAULT, "bad address in system call argument") \ - XX(EHOSTUNREACH, "host is unreachable") \ - XX(EINTR, "interrupted system call") \ - XX(EINVAL, "invalid argument") \ - XX(EIO, "i/o error") \ - XX(EISCONN, "socket is already connected") \ - XX(EISDIR, "illegal operation on a directory") \ - XX(ELOOP, "too many symbolic links encountered") \ - XX(EMFILE, "too many open files") \ - XX(EMSGSIZE, "message too long") \ - XX(ENAMETOOLONG, "name too long") \ - XX(ENETDOWN, "network is down") \ - XX(ENETUNREACH, "network is unreachable") \ - XX(ENFILE, "file table overflow") \ - XX(ENOBUFS, "no buffer space available") \ - XX(ENODEV, "no such device") \ - XX(ENOENT, "no such file or directory") \ - XX(ENOMEM, "not enough memory") \ - XX(ENONET, "machine is not on the network") \ - XX(ENOSPC, "no space left on device") \ - XX(ENOSYS, "function not implemented") \ - XX(ENOTCONN, "socket is not connected") \ - XX(ENOTDIR, "not a directory") \ - XX(ENOTEMPTY, "directory not empty") \ - XX(ENOTSOCK, "socket operation on non-socket") \ - XX(ENOTSUP, "operation not supported on socket") \ - XX(EPERM, "operation not permitted") \ - XX(EPIPE, "broken pipe") \ - XX(EPROTO, "protocol error") \ - XX(EPROTONOSUPPORT, "protocol not supported") \ - XX(EPROTOTYPE, "protocol wrong type for socket") \ - XX(EROFS, "read-only file system") \ - XX(ESHUTDOWN, "cannot send after transport endpoint shutdown") \ - XX(ESPIPE, "invalid seek") \ - XX(ESRCH, "no such process") \ - XX(ETIMEDOUT, "connection timed out") \ - XX(EXDEV, "cross-device link not permitted") \ - XX(UNKNOWN, "unknown error") \ - XX(EOF, "end of file") \ - -#define UV_HANDLE_TYPE_MAP(XX) \ - XX(ASYNC, async) \ - XX(CHECK, check) \ - XX(FS_EVENT, fs_event) \ - XX(FS_POLL, fs_poll) \ - XX(HANDLE, handle) \ - XX(IDLE, idle) \ - XX(NAMED_PIPE, pipe) \ - XX(POLL, poll) \ - XX(PREPARE, prepare) \ - XX(PROCESS, process) \ - XX(STREAM, stream) \ - XX(TCP, tcp) \ - XX(TIMER, timer) \ - XX(TTY, tty) \ - XX(UDP, udp) \ - XX(SIGNAL, signal) \ - -#define UV_REQ_TYPE_MAP(XX) \ - XX(REQ, req) \ - XX(CONNECT, connect) \ - XX(WRITE, write) \ - XX(SHUTDOWN, shutdown) \ - XX(UDP_SEND, udp_send) \ - XX(FS, fs) \ - XX(WORK, work) \ - XX(GETADDRINFO, getaddrinfo) \ - -typedef enum { -#define XX(code, _) UV_ ## code = UV__ ## code, - UV_ERRNO_MAP(XX) -#undef XX - UV_ERRNO_MAX = UV__EOF - 1 -} uv_errno_t; - -typedef enum { - UV_UNKNOWN_HANDLE = 0, -#define XX(uc, lc) UV_##uc, - UV_HANDLE_TYPE_MAP(XX) -#undef XX - UV_FILE, - UV_HANDLE_TYPE_MAX -} uv_handle_type; - -typedef enum { - UV_UNKNOWN_REQ = 0, -#define XX(uc, lc) UV_##uc, - UV_REQ_TYPE_MAP(XX) -#undef XX - UV_REQ_TYPE_PRIVATE - UV_REQ_TYPE_MAX -} uv_req_type; - - -/* Handle types. */ -typedef struct uv_loop_s uv_loop_t; -typedef struct uv_handle_s uv_handle_t; -typedef struct uv_stream_s uv_stream_t; -typedef struct uv_tcp_s uv_tcp_t; -typedef struct uv_udp_s uv_udp_t; -typedef struct uv_pipe_s uv_pipe_t; -typedef struct uv_tty_s uv_tty_t; -typedef struct uv_poll_s uv_poll_t; -typedef struct uv_timer_s uv_timer_t; -typedef struct uv_prepare_s uv_prepare_t; -typedef struct uv_check_s uv_check_t; -typedef struct uv_idle_s uv_idle_t; -typedef struct uv_async_s uv_async_t; -typedef struct uv_process_s uv_process_t; -typedef struct uv_fs_event_s uv_fs_event_t; -typedef struct uv_fs_poll_s uv_fs_poll_t; -typedef struct uv_signal_s uv_signal_t; - -/* Request types. */ -typedef struct uv_req_s uv_req_t; -typedef struct uv_getaddrinfo_s uv_getaddrinfo_t; -typedef struct uv_shutdown_s uv_shutdown_t; -typedef struct uv_write_s uv_write_t; -typedef struct uv_connect_s uv_connect_t; -typedef struct uv_udp_send_s uv_udp_send_t; -typedef struct uv_fs_s uv_fs_t; -typedef struct uv_work_s uv_work_t; - -/* None of the above. */ -typedef struct uv_cpu_info_s uv_cpu_info_t; -typedef struct uv_interface_address_s uv_interface_address_t; - - -typedef enum { - UV_RUN_DEFAULT = 0, - UV_RUN_ONCE, - UV_RUN_NOWAIT -} uv_run_mode; - - -/* - * Returns the libuv version packed into a single integer. 8 bits are used for - * each component, with the patch number stored in the 8 least significant - * bits. E.g. for libuv 1.2.3 this would return 0x010203. - */ -UV_EXTERN unsigned int uv_version(void); - -/* - * Returns the libuv version number as a string. For non-release versions - * "-pre" is appended, so the version number could be "1.2.3-pre". - */ -UV_EXTERN const char* uv_version_string(void); - - -/* - * This function must be called before any other functions in libuv. - * - * All functions besides uv_run() are non-blocking. - * - * All callbacks in libuv are made asynchronously. That is they are never - * made by the function that takes them as a parameter. - */ -UV_EXTERN uv_loop_t* uv_loop_new(void); -UV_EXTERN void uv_loop_delete(uv_loop_t*); - -/* - * Returns the default loop. - */ -UV_EXTERN uv_loop_t* uv_default_loop(void); - -/* - * This function runs the event loop. It will act differently depending on the - * specified mode: - * - UV_RUN_DEFAULT: Runs the event loop until the reference count drops to - * zero. Always returns zero. - * - UV_RUN_ONCE: Poll for new events once. Note that this function blocks if - * there are no pending events. Returns zero when done (no active handles - * or requests left), or non-zero if more events are expected (meaning you - * should run the event loop again sometime in the future). - * - UV_RUN_NOWAIT: Poll for new events once but don't block if there are no - * pending events. - */ -UV_EXTERN int uv_run(uv_loop_t*, uv_run_mode mode); - -/* - * This function will stop the event loop by forcing uv_run to end - * as soon as possible, but not sooner than the next loop iteration. - * If this function was called before blocking for i/o, the loop won't - * block for i/o on this iteration. - */ -UV_EXTERN void uv_stop(uv_loop_t*); - -/* - * Manually modify the event loop's reference count. Useful if the user wants - * to have a handle or timeout that doesn't keep the loop alive. - */ -UV_EXTERN void uv_ref(uv_handle_t*); -UV_EXTERN void uv_unref(uv_handle_t*); -UV_EXTERN int uv_has_ref(const uv_handle_t*); - -/* - * Update the event loop's concept of "now". Libuv caches the current time - * at the start of the event loop tick in order to reduce the number of - * time-related system calls. - * - * You won't normally need to call this function unless you have callbacks - * that block the event loop for longer periods of time, where "longer" is - * somewhat subjective but probably on the order of a millisecond or more. - */ -UV_EXTERN void uv_update_time(uv_loop_t*); - -/* - * Return the current timestamp in milliseconds. The timestamp is cached at - * the start of the event loop tick, see |uv_update_time()| for details and - * rationale. - * - * The timestamp increases monotonically from some arbitrary point in time. - * Don't make assumptions about the starting point, you will only get - * disappointed. - * - * Use uv_hrtime() if you need sub-milliseond granularity. - */ -UV_EXTERN uint64_t uv_now(uv_loop_t*); - -/* - * Get backend file descriptor. Only kqueue, epoll and event ports are - * supported. - * - * This can be used in conjunction with `uv_run(loop, UV_RUN_NOWAIT)` to - * poll in one thread and run the event loop's event callbacks in another. - * - * Useful for embedding libuv's event loop in another event loop. - * See test/test-embed.c for an example. - * - * Note that embedding a kqueue fd in another kqueue pollset doesn't work on - * all platforms. It's not an error to add the fd but it never generates - * events. - */ -UV_EXTERN int uv_backend_fd(const uv_loop_t*); - -/* - * Get the poll timeout. The return value is in milliseconds, or -1 for no - * timeout. - */ -UV_EXTERN int uv_backend_timeout(const uv_loop_t*); - - -/* - * Should return a buffer that libuv can use to read data into. - * - * `suggested_size` is a hint. Returning a buffer that is smaller is perfectly - * okay as long as `buf.len > 0`. - * - * If you return a buffer with `buf.len == 0`, libuv skips the read and calls - * your read or recv callback with nread=UV_ENOBUFS. - * - * Note that returning a zero-length buffer does not stop the handle, call - * uv_read_stop() or uv_udp_recv_stop() for that. - */ -typedef uv_buf_t (*uv_alloc_cb)(uv_handle_t* handle, size_t suggested_size); - -/* - * `nread` is > 0 if there is data available, 0 if libuv is done reading for - * now, or < 0 on error. - * - * The callee is responsible for closing the stream when an error happens. - * Trying to read from the stream again is undefined. - * - * The callee is responsible for freeing the buffer, libuv does not reuse it. - * The buffer may be a null buffer (where buf.base=NULL and buf.len=0) on EOF - * or error. - */ -typedef void (*uv_read_cb)(uv_stream_t* stream, ssize_t nread, uv_buf_t buf); - -/* - * Just like the uv_read_cb except that if the pending parameter is true - * then you can use uv_accept() to pull the new handle into the process. - * If no handle is pending then pending will be UV_UNKNOWN_HANDLE. - */ -typedef void (*uv_read2_cb)(uv_pipe_t* pipe, ssize_t nread, uv_buf_t buf, - uv_handle_type pending); - -typedef void (*uv_write_cb)(uv_write_t* req, int status); -typedef void (*uv_connect_cb)(uv_connect_t* req, int status); -typedef void (*uv_shutdown_cb)(uv_shutdown_t* req, int status); -typedef void (*uv_connection_cb)(uv_stream_t* server, int status); -typedef void (*uv_close_cb)(uv_handle_t* handle); -typedef void (*uv_poll_cb)(uv_poll_t* handle, int status, int events); -typedef void (*uv_timer_cb)(uv_timer_t* handle, int status); -/* TODO: do these really need a status argument? */ -typedef void (*uv_async_cb)(uv_async_t* handle, int status); -typedef void (*uv_prepare_cb)(uv_prepare_t* handle, int status); -typedef void (*uv_check_cb)(uv_check_t* handle, int status); -typedef void (*uv_idle_cb)(uv_idle_t* handle, int status); -typedef void (*uv_exit_cb)(uv_process_t*, int exit_status, int term_signal); -typedef void (*uv_walk_cb)(uv_handle_t* handle, void* arg); -typedef void (*uv_fs_cb)(uv_fs_t* req); -typedef void (*uv_work_cb)(uv_work_t* req); -typedef void (*uv_after_work_cb)(uv_work_t* req, int status); -typedef void (*uv_getaddrinfo_cb)(uv_getaddrinfo_t* req, - int status, - struct addrinfo* res); - -typedef struct { - long tv_sec; - long tv_nsec; -} uv_timespec_t; - - -typedef struct { - uint64_t st_dev; - uint64_t st_mode; - uint64_t st_nlink; - uint64_t st_uid; - uint64_t st_gid; - uint64_t st_rdev; - uint64_t st_ino; - uint64_t st_size; - uint64_t st_blksize; - uint64_t st_blocks; - uint64_t st_flags; - uint64_t st_gen; - uv_timespec_t st_atim; - uv_timespec_t st_mtim; - uv_timespec_t st_ctim; - uv_timespec_t st_birthtim; -} uv_stat_t; - - -/* -* This will be called repeatedly after the uv_fs_event_t is initialized. -* If uv_fs_event_t was initialized with a directory the filename parameter -* will be a relative path to a file contained in the directory. -* The events parameter is an ORed mask of enum uv_fs_event elements. -*/ -typedef void (*uv_fs_event_cb)(uv_fs_event_t* handle, const char* filename, - int events, int status); - -typedef void (*uv_fs_poll_cb)(uv_fs_poll_t* handle, - int status, - const uv_stat_t* prev, - const uv_stat_t* curr); - -typedef void (*uv_signal_cb)(uv_signal_t* handle, int signum); - - -typedef enum { - UV_LEAVE_GROUP = 0, - UV_JOIN_GROUP -} uv_membership; - - -/* - * Most functions return 0 on success or an error code < 0 on failure. - */ -UV_EXTERN const char* uv_strerror(int err); -UV_EXTERN const char* uv_err_name(int err); - - -#define UV_REQ_FIELDS \ - /* public */ \ - void* data; \ - /* read-only */ \ - uv_req_type type; \ - /* private */ \ - void* active_queue[2]; \ - UV_REQ_PRIVATE_FIELDS \ - -/* Abstract base class of all requests. */ -struct uv_req_s { - UV_REQ_FIELDS -}; - - -/* Platform-specific request types */ -UV_PRIVATE_REQ_TYPES - - -/* - * uv_shutdown_t is a subclass of uv_req_t - * - * Shutdown the outgoing (write) side of a duplex stream. It waits for - * pending write requests to complete. The handle should refer to a - * initialized stream. req should be an uninitialized shutdown request - * struct. The cb is called after shutdown is complete. - */ -UV_EXTERN int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle, - uv_shutdown_cb cb); - -struct uv_shutdown_s { - UV_REQ_FIELDS - uv_stream_t* handle; - uv_shutdown_cb cb; - UV_SHUTDOWN_PRIVATE_FIELDS -}; - - -#define UV_HANDLE_FIELDS \ - /* public */ \ - uv_close_cb close_cb; \ - void* data; \ - /* read-only */ \ - uv_loop_t* loop; \ - uv_handle_type type; \ - /* private */ \ - void* handle_queue[2]; \ - UV_HANDLE_PRIVATE_FIELDS \ - -/* The abstract base class of all handles. */ -struct uv_handle_s { - UV_HANDLE_FIELDS -}; - -/* - * Returns size of various handle types, useful for FFI - * bindings to allocate correct memory without copying struct - * definitions - */ -UV_EXTERN size_t uv_handle_size(uv_handle_type type); - -/* - * Returns size of request types, useful for dynamic lookup with FFI - */ -UV_EXTERN size_t uv_req_size(uv_req_type type); - -/* - * Returns 1 if the prepare/check/idle/timer handle has been started, 0 - * otherwise. For other handle types this always returns 1. - */ -UV_EXTERN int uv_is_active(const uv_handle_t* handle); - -/* - * Walk the list of open handles. - */ -UV_EXTERN void uv_walk(uv_loop_t* loop, uv_walk_cb walk_cb, void* arg); - - -/* - * Request handle to be closed. close_cb will be called asynchronously after - * this call. This MUST be called on each handle before memory is released. - * - * Note that handles that wrap file descriptors are closed immediately but - * close_cb will still be deferred to the next iteration of the event loop. - * It gives you a chance to free up any resources associated with the handle. - * - * In-progress requests, like uv_connect_t or uv_write_t, are cancelled and - * have their callbacks called asynchronously with status=UV_ECANCELED. - */ -UV_EXTERN void uv_close(uv_handle_t* handle, uv_close_cb close_cb); - - -/* - * Constructor for uv_buf_t. - * Due to platform differences the user cannot rely on the ordering of the - * base and len members of the uv_buf_t struct. The user is responsible for - * freeing base after the uv_buf_t is done. Return struct passed by value. - */ -UV_EXTERN uv_buf_t uv_buf_init(char* base, unsigned int len); - - -/* - * Utility function. Copies up to `size` characters from `src` to `dst` - * and ensures that `dst` is properly NUL terminated unless `size` is zero. - */ -UV_EXTERN size_t uv_strlcpy(char* dst, const char* src, size_t size); - -/* - * Utility function. Appends `src` to `dst` and ensures that `dst` is - * properly NUL terminated unless `size` is zero or `dst` does not - * contain a NUL byte. `size` is the total length of `dst` so at most - * `size - strlen(dst) - 1` characters will be copied from `src`. - */ -UV_EXTERN size_t uv_strlcat(char* dst, const char* src, size_t size); - - -#define UV_STREAM_FIELDS \ - /* number of bytes queued for writing */ \ - size_t write_queue_size; \ - uv_alloc_cb alloc_cb; \ - uv_read_cb read_cb; \ - uv_read2_cb read2_cb; \ - /* private */ \ - UV_STREAM_PRIVATE_FIELDS - -/* - * uv_stream_t is a subclass of uv_handle_t - * - * uv_stream is an abstract class. - * - * uv_stream_t is the parent class of uv_tcp_t, uv_pipe_t, uv_tty_t, and - * soon uv_file_t. - */ -struct uv_stream_s { - UV_HANDLE_FIELDS - UV_STREAM_FIELDS -}; - -UV_EXTERN int uv_listen(uv_stream_t* stream, int backlog, uv_connection_cb cb); - -/* - * This call is used in conjunction with uv_listen() to accept incoming - * connections. Call uv_accept after receiving a uv_connection_cb to accept - * the connection. Before calling uv_accept use uv_*_init() must be - * called on the client. Non-zero return value indicates an error. - * - * When the uv_connection_cb is called it is guaranteed that uv_accept will - * complete successfully the first time. If you attempt to use it more than - * once, it may fail. It is suggested to only call uv_accept once per - * uv_connection_cb call. - */ -UV_EXTERN int uv_accept(uv_stream_t* server, uv_stream_t* client); - -/* - * Read data from an incoming stream. The callback will be made several - * times until there is no more data to read or uv_read_stop is called. - * When we've reached EOF nread will be set to UV_EOF. - * - * When nread < 0, the buf parameter might not point to a valid buffer; - * in that case buf.len and buf.base are both set to 0. - * - * Note that nread might also be 0, which does *not* indicate an error or - * eof; it happens when libuv requested a buffer through the alloc callback - * but then decided that it didn't need that buffer. - */ -UV_EXTERN int uv_read_start(uv_stream_t*, uv_alloc_cb alloc_cb, - uv_read_cb read_cb); - -UV_EXTERN int uv_read_stop(uv_stream_t*); - -/* - * Extended read methods for receiving handles over a pipe. The pipe must be - * initialized with ipc == 1. - */ -UV_EXTERN int uv_read2_start(uv_stream_t*, uv_alloc_cb alloc_cb, - uv_read2_cb read_cb); - - -/* - * Write data to stream. Buffers are written in order. Example: - * - * uv_buf_t a[] = { - * { .base = "1", .len = 1 }, - * { .base = "2", .len = 1 } - * }; - * - * uv_buf_t b[] = { - * { .base = "3", .len = 1 }, - * { .base = "4", .len = 1 } - * }; - * - * uv_write_t req1; - * uv_write_t req2; - * - * // writes "1234" - * uv_write(&req1, stream, a, 2); - * uv_write(&req2, stream, b, 2); - * - */ -UV_EXTERN int uv_write(uv_write_t* req, uv_stream_t* handle, - uv_buf_t bufs[], int bufcnt, uv_write_cb cb); - -/* - * Extended write function for sending handles over a pipe. The pipe must be - * initialized with ipc == 1. - * send_handle must be a TCP socket or pipe, which is a server or a connection - * (listening or connected state). Bound sockets or pipes will be assumed to - * be servers. - */ -UV_EXTERN int uv_write2(uv_write_t* req, uv_stream_t* handle, uv_buf_t bufs[], - int bufcnt, uv_stream_t* send_handle, uv_write_cb cb); - -/* uv_write_t is a subclass of uv_req_t */ -struct uv_write_s { - UV_REQ_FIELDS - uv_write_cb cb; - uv_stream_t* send_handle; - uv_stream_t* handle; - UV_WRITE_PRIVATE_FIELDS -}; - - -/* - * Used to determine whether a stream is readable or writable. - */ -UV_EXTERN int uv_is_readable(const uv_stream_t* handle); -UV_EXTERN int uv_is_writable(const uv_stream_t* handle); - - -/* - * Enable or disable blocking mode for a stream. - * - * When blocking mode is enabled all writes complete synchronously. The - * interface remains unchanged otherwise, e.g. completion or failure of the - * operation will still be reported through a callback which is made - * asychronously. - * - * Relying too much on this API is not recommended. It is likely to change - * significantly in the future. - * - * On windows this currently works only for uv_pipe_t instances. On unix it - * works for tcp, pipe and tty instances. Be aware that changing the blocking - * mode on unix sets or clears the O_NONBLOCK bit. If you are sharing a handle - * with another process, the other process is affected by the change too, - * which can lead to unexpected results. - * - * Also libuv currently makes no ordering guarantee when the blocking mode - * is changed after write requests have already been submitted. Therefore it is - * recommended to set the blocking mode immediately after opening or creating - * the stream. - */ -UV_EXTERN int uv_stream_set_blocking(uv_stream_t* handle, int blocking); - - -/* - * Used to determine whether a stream is closing or closed. - * - * N.B. is only valid between the initialization of the handle - * and the arrival of the close callback, and cannot be used - * to validate the handle. - */ -UV_EXTERN int uv_is_closing(const uv_handle_t* handle); - - -/* - * uv_tcp_t is a subclass of uv_stream_t - * - * Represents a TCP stream or TCP server. - */ -struct uv_tcp_s { - UV_HANDLE_FIELDS - UV_STREAM_FIELDS - UV_TCP_PRIVATE_FIELDS -}; - -UV_EXTERN int uv_tcp_init(uv_loop_t*, uv_tcp_t* handle); - -/* - * Opens an existing file descriptor or SOCKET as a tcp handle. - */ -UV_EXTERN int uv_tcp_open(uv_tcp_t* handle, uv_os_sock_t sock); - -/* Enable/disable Nagle's algorithm. */ -UV_EXTERN int uv_tcp_nodelay(uv_tcp_t* handle, int enable); - -/* - * Enable/disable TCP keep-alive. - * - * `delay` is the initial delay in seconds, ignored when `enable` is zero. - */ -UV_EXTERN int uv_tcp_keepalive(uv_tcp_t* handle, - int enable, - unsigned int delay); - -/* - * Enable/disable simultaneous asynchronous accept requests that are - * queued by the operating system when listening for new tcp connections. - * This setting is used to tune a tcp server for the desired performance. - * Having simultaneous accepts can significantly improve the rate of - * accepting connections (which is why it is enabled by default) but - * may lead to uneven load distribution in multi-process setups. - */ -UV_EXTERN int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable); - -UV_EXTERN int uv_tcp_bind(uv_tcp_t* handle, struct sockaddr_in); -UV_EXTERN int uv_tcp_bind6(uv_tcp_t* handle, struct sockaddr_in6); -UV_EXTERN int uv_tcp_getsockname(uv_tcp_t* handle, struct sockaddr* name, - int* namelen); -UV_EXTERN int uv_tcp_getpeername(uv_tcp_t* handle, struct sockaddr* name, - int* namelen); - -/* - * uv_tcp_connect, uv_tcp_connect6 - * These functions establish IPv4 and IPv6 TCP connections. Provide an - * initialized TCP handle and an uninitialized uv_connect_t*. The callback - * will be made when the connection is established. - */ -UV_EXTERN int uv_tcp_connect(uv_connect_t* req, uv_tcp_t* handle, - struct sockaddr_in address, uv_connect_cb cb); -UV_EXTERN int uv_tcp_connect6(uv_connect_t* req, uv_tcp_t* handle, - struct sockaddr_in6 address, uv_connect_cb cb); - -/* uv_connect_t is a subclass of uv_req_t */ -struct uv_connect_s { - UV_REQ_FIELDS - uv_connect_cb cb; - uv_stream_t* handle; - UV_CONNECT_PRIVATE_FIELDS -}; - - -/* - * UDP support. - */ - -enum uv_udp_flags { - /* Disables dual stack mode. Used with uv_udp_bind6(). */ - UV_UDP_IPV6ONLY = 1, - /* - * Indicates message was truncated because read buffer was too small. The - * remainder was discarded by the OS. Used in uv_udp_recv_cb. - */ - UV_UDP_PARTIAL = 2 -}; - -/* - * Called after a uv_udp_send() or uv_udp_send6(). status 0 indicates - * success otherwise error. - */ -typedef void (*uv_udp_send_cb)(uv_udp_send_t* req, int status); - -/* - * Callback that is invoked when a new UDP datagram is received. - * - * handle UDP handle. - * nread Number of bytes that have been received. - * 0 if there is no more data to read. You may - * discard or repurpose the read buffer. - * < 0 if a transmission error was detected. - * buf uv_buf_t with the received data. - * addr struct sockaddr_in or struct sockaddr_in6. - * Valid for the duration of the callback only. - * flags One or more OR'ed UV_UDP_* constants. - * Right now only UV_UDP_PARTIAL is used. - */ -typedef void (*uv_udp_recv_cb)(uv_udp_t* handle, ssize_t nread, uv_buf_t buf, - struct sockaddr* addr, unsigned flags); - -/* uv_udp_t is a subclass of uv_handle_t */ -struct uv_udp_s { - UV_HANDLE_FIELDS - UV_UDP_PRIVATE_FIELDS -}; - -/* uv_udp_send_t is a subclass of uv_req_t */ -struct uv_udp_send_s { - UV_REQ_FIELDS - uv_udp_t* handle; - uv_udp_send_cb cb; - UV_UDP_SEND_PRIVATE_FIELDS -}; - -/* - * Initialize a new UDP handle. The actual socket is created lazily. - * Returns 0 on success. - */ -UV_EXTERN int uv_udp_init(uv_loop_t*, uv_udp_t* handle); - -/* - * Opens an existing file descriptor or SOCKET as a udp handle. - * - * Unix only: - * The only requirement of the sock argument is that it follows the - * datagram contract (works in unconnected mode, supports sendmsg()/recvmsg(), - * etc.). In other words, other datagram-type sockets like raw sockets or - * netlink sockets can also be passed to this function. - */ -UV_EXTERN int uv_udp_open(uv_udp_t* handle, uv_os_sock_t sock); - -/* - * Bind to a IPv4 address and port. - * - * Arguments: - * handle UDP handle. Should have been initialized with `uv_udp_init`. - * addr struct sockaddr_in with the address and port to bind to. - * flags Unused. - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_bind(uv_udp_t* handle, struct sockaddr_in addr, - unsigned flags); - -/* - * Bind to a IPv6 address and port. - * - * Arguments: - * handle UDP handle. Should have been initialized with `uv_udp_init`. - * addr struct sockaddr_in with the address and port to bind to. - * flags Should be 0 or UV_UDP_IPV6ONLY. - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_bind6(uv_udp_t* handle, struct sockaddr_in6 addr, - unsigned flags); - -UV_EXTERN int uv_udp_getsockname(uv_udp_t* handle, struct sockaddr* name, - int* namelen); - -/* - * Set membership for a multicast address - * - * Arguments: - * handle UDP handle. Should have been initialized with - * `uv_udp_init`. - * multicast_addr multicast address to set membership for - * interface_addr interface address - * membership Should be UV_JOIN_GROUP or UV_LEAVE_GROUP - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_set_membership(uv_udp_t* handle, - const char* multicast_addr, const char* interface_addr, - uv_membership membership); - -/* - * Set IP multicast loop flag. Makes multicast packets loop back to - * local sockets. - * - * Arguments: - * handle UDP handle. Should have been initialized with - * `uv_udp_init`. - * on 1 for on, 0 for off - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_set_multicast_loop(uv_udp_t* handle, int on); - -/* - * Set the multicast ttl - * - * Arguments: - * handle UDP handle. Should have been initialized with - * `uv_udp_init`. - * ttl 1 through 255 - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_set_multicast_ttl(uv_udp_t* handle, int ttl); - -/* - * Set broadcast on or off - * - * Arguments: - * handle UDP handle. Should have been initialized with - * `uv_udp_init`. - * on 1 for on, 0 for off - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_set_broadcast(uv_udp_t* handle, int on); - -/* - * Set the time to live - * - * Arguments: - * handle UDP handle. Should have been initialized with - * `uv_udp_init`. - * ttl 1 through 255 - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_set_ttl(uv_udp_t* handle, int ttl); - -/* - * Send data. If the socket has not previously been bound with `uv_udp_bind` - * or `uv_udp_bind6`, it is bound to 0.0.0.0 (the "all interfaces" address) - * and a random port number. - * - * Arguments: - * req UDP request handle. Need not be initialized. - * handle UDP handle. Should have been initialized with `uv_udp_init`. - * bufs List of buffers to send. - * bufcnt Number of buffers in `bufs`. - * addr Address of the remote peer. See `uv_ip4_addr`. - * send_cb Callback to invoke when the data has been sent out. - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_send(uv_udp_send_t* req, uv_udp_t* handle, - uv_buf_t bufs[], int bufcnt, struct sockaddr_in addr, - uv_udp_send_cb send_cb); - -/* - * Send data. If the socket has not previously been bound with `uv_udp_bind6`, - * it is bound to ::0 (the "all interfaces" address) and a random port number. - * - * Arguments: - * req UDP request handle. Need not be initialized. - * handle UDP handle. Should have been initialized with `uv_udp_init`. - * bufs List of buffers to send. - * bufcnt Number of buffers in `bufs`. - * addr Address of the remote peer. See `uv_ip6_addr`. - * send_cb Callback to invoke when the data has been sent out. - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_send6(uv_udp_send_t* req, uv_udp_t* handle, - uv_buf_t bufs[], int bufcnt, struct sockaddr_in6 addr, - uv_udp_send_cb send_cb); - -/* - * Receive data. If the socket has not previously been bound with `uv_udp_bind` - * or `uv_udp_bind6`, it is bound to 0.0.0.0 (the "all interfaces" address) - * and a random port number. - * - * Arguments: - * handle UDP handle. Should have been initialized with `uv_udp_init`. - * alloc_cb Callback to invoke when temporary storage is needed. - * recv_cb Callback to invoke with received data. - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloc_cb, - uv_udp_recv_cb recv_cb); - -/* - * Stop listening for incoming datagrams. - * - * Arguments: - * handle UDP handle. Should have been initialized with `uv_udp_init`. - * - * Returns: - * 0 on success, or an error code < 0 on failure. - */ -UV_EXTERN int uv_udp_recv_stop(uv_udp_t* handle); - - -/* - * uv_tty_t is a subclass of uv_stream_t - * - * Representing a stream for the console. - */ -struct uv_tty_s { - UV_HANDLE_FIELDS - UV_STREAM_FIELDS - UV_TTY_PRIVATE_FIELDS -}; - -/* - * Initialize a new TTY stream with the given file descriptor. Usually the - * file descriptor will be - * 0 = stdin - * 1 = stdout - * 2 = stderr - * The last argument, readable, specifies if you plan on calling - * uv_read_start with this stream. stdin is readable, stdout is not. - * - * TTY streams which are not readable have blocking writes. - */ -UV_EXTERN int uv_tty_init(uv_loop_t*, uv_tty_t*, uv_file fd, int readable); - -/* - * Set mode. 0 for normal, 1 for raw. - */ -UV_EXTERN int uv_tty_set_mode(uv_tty_t*, int mode); - -/* - * To be called when the program exits. Resets TTY settings to default - * values for the next process to take over. - */ -UV_EXTERN void uv_tty_reset_mode(void); - -/* - * Gets the current Window size. On success zero is returned. - */ -UV_EXTERN int uv_tty_get_winsize(uv_tty_t*, int* width, int* height); - -/* - * Used to detect what type of stream should be used with a given file - * descriptor. Usually this will be used during initialization to guess the - * type of the stdio streams. - * For isatty() functionality use this function and test for UV_TTY. - */ -UV_EXTERN uv_handle_type uv_guess_handle(uv_file file); - -/* - * uv_pipe_t is a subclass of uv_stream_t - * - * Representing a pipe stream or pipe server. On Windows this is a Named - * Pipe. On Unix this is a UNIX domain socket. - */ -struct uv_pipe_s { - UV_HANDLE_FIELDS - UV_STREAM_FIELDS - int ipc; /* non-zero if this pipe is used for passing handles */ - UV_PIPE_PRIVATE_FIELDS -}; - -/* - * Initialize a pipe. The last argument is a boolean to indicate if - * this pipe will be used for handle passing between processes. - */ -UV_EXTERN int uv_pipe_init(uv_loop_t*, uv_pipe_t* handle, int ipc); - -/* - * Opens an existing file descriptor or HANDLE as a pipe. - */ -UV_EXTERN int uv_pipe_open(uv_pipe_t*, uv_file file); - -UV_EXTERN int uv_pipe_bind(uv_pipe_t* handle, const char* name); - -UV_EXTERN void uv_pipe_connect(uv_connect_t* req, uv_pipe_t* handle, - const char* name, uv_connect_cb cb); - -/* - * This setting applies to Windows only. - * Set the number of pending pipe instance handles when the pipe server - * is waiting for connections. - */ -UV_EXTERN void uv_pipe_pending_instances(uv_pipe_t* handle, int count); - - -/* - * uv_poll_t is a subclass of uv_handle_t. - * - * The uv_poll watcher is used to watch file descriptors for readability and - * writability, similar to the purpose of poll(2). - * - * The purpose of uv_poll is to enable integrating external libraries that - * rely on the event loop to signal it about the socket status changes, like - * c-ares or libssh2. Using uv_poll_t for any other other purpose is not - * recommended; uv_tcp_t, uv_udp_t, etc. provide an implementation that is - * much faster and more scalable than what can be achieved with uv_poll_t, - * especially on Windows. - * - * It is possible that uv_poll occasionally signals that a file descriptor is - * readable or writable even when it isn't. The user should therefore always - * be prepared to handle EAGAIN or equivalent when it attempts to read from or - * write to the fd. - * - * It is not okay to have multiple active uv_poll watchers for the same socket. - * This can cause libuv to busyloop or otherwise malfunction. - * - * The user should not close a file descriptor while it is being polled by an - * active uv_poll watcher. This can cause the poll watcher to report an error, - * but it might also start polling another socket. However the fd can be safely - * closed immediately after a call to uv_poll_stop() or uv_close(). - * - * On windows only sockets can be polled with uv_poll. On unix any file - * descriptor that would be accepted by poll(2) can be used with uv_poll. - */ -struct uv_poll_s { - UV_HANDLE_FIELDS - uv_poll_cb poll_cb; - UV_POLL_PRIVATE_FIELDS -}; - -enum uv_poll_event { - UV_READABLE = 1, - UV_WRITABLE = 2 -}; - -/* Initialize the poll watcher using a file descriptor. */ -UV_EXTERN int uv_poll_init(uv_loop_t* loop, uv_poll_t* handle, int fd); - -/* Initialize the poll watcher using a socket descriptor. On unix this is */ -/* identical to uv_poll_init. On windows it takes a SOCKET handle. */ -UV_EXTERN int uv_poll_init_socket(uv_loop_t* loop, uv_poll_t* handle, - uv_os_sock_t socket); - -/* - * Starts polling the file descriptor. `events` is a bitmask consisting made up - * of UV_READABLE and UV_WRITABLE. As soon as an event is detected the callback - * will be called with `status` set to 0, and the detected events set en the - * `events` field. - * - * If an error happens while polling status, `status` < 0 and corresponds - * with one of the UV_E* error codes. The user should not close the socket - * while uv_poll is active. If the user does that anyway, the callback *may* - * be called reporting an error status, but this is not guaranteed. - * - * Calling uv_poll_start on an uv_poll watcher that is already active is fine. - * Doing so will update the events mask that is being watched for. - */ -UV_EXTERN int uv_poll_start(uv_poll_t* handle, int events, uv_poll_cb cb); - -/* Stops polling the file descriptor. */ -UV_EXTERN int uv_poll_stop(uv_poll_t* handle); - - -/* - * uv_prepare_t is a subclass of uv_handle_t. - * - * Every active prepare handle gets its callback called exactly once per loop - * iteration, just before the system blocks to wait for completed i/o. - */ -struct uv_prepare_s { - UV_HANDLE_FIELDS - UV_PREPARE_PRIVATE_FIELDS -}; - -UV_EXTERN int uv_prepare_init(uv_loop_t*, uv_prepare_t* prepare); - -UV_EXTERN int uv_prepare_start(uv_prepare_t* prepare, uv_prepare_cb cb); - -UV_EXTERN int uv_prepare_stop(uv_prepare_t* prepare); - - -/* - * uv_check_t is a subclass of uv_handle_t. - * - * Every active check handle gets its callback called exactly once per loop - * iteration, just after the system returns from blocking. - */ -struct uv_check_s { - UV_HANDLE_FIELDS - UV_CHECK_PRIVATE_FIELDS -}; - -UV_EXTERN int uv_check_init(uv_loop_t*, uv_check_t* check); - -UV_EXTERN int uv_check_start(uv_check_t* check, uv_check_cb cb); - -UV_EXTERN int uv_check_stop(uv_check_t* check); - - -/* - * uv_idle_t is a subclass of uv_handle_t. - * - * Every active idle handle gets its callback called repeatedly until it is - * stopped. This happens after all other types of callbacks are processed. - * When there are multiple "idle" handles active, their callbacks are called - * in turn. - */ -struct uv_idle_s { - UV_HANDLE_FIELDS - UV_IDLE_PRIVATE_FIELDS -}; - -UV_EXTERN int uv_idle_init(uv_loop_t*, uv_idle_t* idle); - -UV_EXTERN int uv_idle_start(uv_idle_t* idle, uv_idle_cb cb); - -UV_EXTERN int uv_idle_stop(uv_idle_t* idle); - - -/* - * uv_async_t is a subclass of uv_handle_t. - * - * uv_async_send wakes up the event loop and calls the async handle's callback. - * There is no guarantee that every uv_async_send call leads to exactly one - * invocation of the callback; the only guarantee is that the callback function - * is called at least once after the call to async_send. Unlike all other - * libuv functions, uv_async_send can be called from another thread. - */ -struct uv_async_s { - UV_HANDLE_FIELDS - UV_ASYNC_PRIVATE_FIELDS -}; - -/* - * Initialize the uv_async_t handle. A NULL callback is allowed. - * - * Note that uv_async_init(), unlike other libuv functions, immediately - * starts the handle. To stop the handle again, close it with uv_close(). - */ -UV_EXTERN int uv_async_init(uv_loop_t*, uv_async_t* async, - uv_async_cb async_cb); - -/* - * This can be called from other threads to wake up a libuv thread. - * - * libuv is single threaded at the moment. - */ -UV_EXTERN int uv_async_send(uv_async_t* async); - - -/* - * uv_timer_t is a subclass of uv_handle_t. - * - * Used to get woken up at a specified time in the future. - */ -struct uv_timer_s { - UV_HANDLE_FIELDS - UV_TIMER_PRIVATE_FIELDS -}; - -UV_EXTERN int uv_timer_init(uv_loop_t*, uv_timer_t* handle); - -/* - * Start the timer. `timeout` and `repeat` are in milliseconds. - * - * If timeout is zero, the callback fires on the next tick of the event loop. - * - * If repeat is non-zero, the callback fires first after timeout milliseconds - * and then repeatedly after repeat milliseconds. - */ -UV_EXTERN int uv_timer_start(uv_timer_t* handle, - uv_timer_cb cb, - uint64_t timeout, - uint64_t repeat); - -UV_EXTERN int uv_timer_stop(uv_timer_t* handle); - -/* - * Stop the timer, and if it is repeating restart it using the repeat value - * as the timeout. If the timer has never been started before it returns - * UV_EINVAL. - */ -UV_EXTERN int uv_timer_again(uv_timer_t* handle); - -/* - * Set the repeat value in milliseconds. Note that if the repeat value is set - * from a timer callback it does not immediately take effect. If the timer was - * non-repeating before, it will have been stopped. If it was repeating, then - * the old repeat value will have been used to schedule the next timeout. - */ -UV_EXTERN void uv_timer_set_repeat(uv_timer_t* handle, uint64_t repeat); - -UV_EXTERN uint64_t uv_timer_get_repeat(const uv_timer_t* handle); - - -/* - * uv_getaddrinfo_t is a subclass of uv_req_t - * - * Request object for uv_getaddrinfo. - */ -struct uv_getaddrinfo_s { - UV_REQ_FIELDS - /* read-only */ - uv_loop_t* loop; - UV_GETADDRINFO_PRIVATE_FIELDS -}; - - -/* - * Asynchronous getaddrinfo(3). - * - * Either node or service may be NULL but not both. - * - * hints is a pointer to a struct addrinfo with additional address type - * constraints, or NULL. Consult `man -s 3 getaddrinfo` for details. - * - * Returns 0 on success or an error code < 0 on failure. - * - * If successful, your callback gets called sometime in the future with the - * lookup result, which is either: - * - * a) err == 0, the res argument points to a valid struct addrinfo, or - * b) err < 0, the res argument is NULL. See the UV_EAI_* constants. - * - * Call uv_freeaddrinfo() to free the addrinfo structure. - */ -UV_EXTERN int uv_getaddrinfo(uv_loop_t* loop, - uv_getaddrinfo_t* req, - uv_getaddrinfo_cb getaddrinfo_cb, - const char* node, - const char* service, - const struct addrinfo* hints); - -/* - * Free the struct addrinfo. Passing NULL is allowed and is a no-op. - */ -UV_EXTERN void uv_freeaddrinfo(struct addrinfo* ai); - - -/* uv_spawn() options */ -typedef enum { - UV_IGNORE = 0x00, - UV_CREATE_PIPE = 0x01, - UV_INHERIT_FD = 0x02, - UV_INHERIT_STREAM = 0x04, - - /* When UV_CREATE_PIPE is specified, UV_READABLE_PIPE and UV_WRITABLE_PIPE - * determine the direction of flow, from the child process' perspective. Both - * flags may be specified to create a duplex data stream. - */ - UV_READABLE_PIPE = 0x10, - UV_WRITABLE_PIPE = 0x20 -} uv_stdio_flags; - -typedef struct uv_stdio_container_s { - uv_stdio_flags flags; - - union { - uv_stream_t* stream; - int fd; - } data; -} uv_stdio_container_t; - -typedef struct uv_process_options_s { - uv_exit_cb exit_cb; /* Called after the process exits. */ - const char* file; /* Path to program to execute. */ - /* - * Command line arguments. args[0] should be the path to the program. On - * Windows this uses CreateProcess which concatenates the arguments into a - * string this can cause some strange errors. See the note at - * windows_verbatim_arguments. - */ - char** args; - /* - * This will be set as the environ variable in the subprocess. If this is - * NULL then the parents environ will be used. - */ - char** env; - /* - * If non-null this represents a directory the subprocess should execute - * in. Stands for current working directory. - */ - char* cwd; - /* - * Various flags that control how uv_spawn() behaves. See the definition of - * `enum uv_process_flags` below. - */ - unsigned int flags; - /* - * The `stdio` field points to an array of uv_stdio_container_t structs that - * describe the file descriptors that will be made available to the child - * process. The convention is that stdio[0] points to stdin, fd 1 is used for - * stdout, and fd 2 is stderr. - * - * Note that on windows file descriptors greater than 2 are available to the - * child process only if the child processes uses the MSVCRT runtime. - */ - int stdio_count; - uv_stdio_container_t* stdio; - /* - * Libuv can change the child process' user/group id. This happens only when - * the appropriate bits are set in the flags fields. This is not supported on - * windows; uv_spawn() will fail and set the error to UV_ENOTSUP. - */ - uv_uid_t uid; - uv_gid_t gid; -} uv_process_options_t; - -/* - * These are the flags that can be used for the uv_process_options.flags field. - */ -enum uv_process_flags { - /* - * Set the child process' user id. The user id is supplied in the `uid` field - * of the options struct. This does not work on windows; setting this flag - * will cause uv_spawn() to fail. - */ - UV_PROCESS_SETUID = (1 << 0), - /* - * Set the child process' group id. The user id is supplied in the `gid` - * field of the options struct. This does not work on windows; setting this - * flag will cause uv_spawn() to fail. - */ - UV_PROCESS_SETGID = (1 << 1), - /* - * Do not wrap any arguments in quotes, or perform any other escaping, when - * converting the argument list into a command line string. This option is - * only meaningful on Windows systems. On unix it is silently ignored. - */ - UV_PROCESS_WINDOWS_VERBATIM_ARGUMENTS = (1 << 2), - /* - * Spawn the child process in a detached state - this will make it a process - * group leader, and will effectively enable the child to keep running after - * the parent exits. Note that the child process will still keep the - * parent's event loop alive unless the parent process calls uv_unref() on - * the child's process handle. - */ - UV_PROCESS_DETACHED = (1 << 3), - /* - * Hide the subprocess console window that would normally be created. This - * option is only meaningful on Windows systems. On unix it is silently - * ignored. - */ - UV_PROCESS_WINDOWS_HIDE = (1 << 4) -}; - -/* - * uv_process_t is a subclass of uv_handle_t - */ -struct uv_process_s { - UV_HANDLE_FIELDS - uv_exit_cb exit_cb; - int pid; - UV_PROCESS_PRIVATE_FIELDS -}; - -/* Initializes uv_process_t and starts the process. */ -UV_EXTERN int uv_spawn(uv_loop_t*, uv_process_t*, - uv_process_options_t options); - - -/* - * Kills the process with the specified signal. The user must still - * call uv_close on the process. - */ -UV_EXTERN int uv_process_kill(uv_process_t*, int signum); - - -/* Kills the process with the specified signal. */ -UV_EXTERN int uv_kill(int pid, int signum); - - -/* - * uv_work_t is a subclass of uv_req_t - */ -struct uv_work_s { - UV_REQ_FIELDS - uv_loop_t* loop; - uv_work_cb work_cb; - uv_after_work_cb after_work_cb; - UV_WORK_PRIVATE_FIELDS -}; - -/* Queues a work request to execute asynchronously on the thread pool. */ -UV_EXTERN int uv_queue_work(uv_loop_t* loop, uv_work_t* req, - uv_work_cb work_cb, uv_after_work_cb after_work_cb); - -/* Cancel a pending request. Fails if the request is executing or has finished - * executing. - * - * Returns 0 on success, or an error code < 0 on failure. - * - * Only cancellation of uv_fs_t, uv_getaddrinfo_t and uv_work_t requests is - * currently supported. - * - * Cancelled requests have their callbacks invoked some time in the future. - * It's _not_ safe to free the memory associated with the request until your - * callback is called. - * - * Here is how cancellation is reported to your callback: - * - * - A uv_fs_t request has its req->result field set to UV_ECANCELED. - * - * - A uv_work_t or uv_getaddrinfo_t request has its callback invoked with - * status == UV_ECANCELED. - * - * This function is currently only implemented on UNIX platforms. On Windows, - * it always returns UV_ENOSYS. - */ -UV_EXTERN int uv_cancel(uv_req_t* req); - - -struct uv_cpu_info_s { - char* model; - int speed; - struct uv_cpu_times_s { - uint64_t user; - uint64_t nice; - uint64_t sys; - uint64_t idle; - uint64_t irq; - } cpu_times; -}; - -struct uv_interface_address_s { - char* name; - char phys_addr[6]; - int is_internal; - union { - struct sockaddr_in address4; - struct sockaddr_in6 address6; - } address; - union { - struct sockaddr_in netmask4; - struct sockaddr_in6 netmask6; - } netmask; -}; - -UV_EXTERN char** uv_setup_args(int argc, char** argv); -UV_EXTERN int uv_get_process_title(char* buffer, size_t size); -UV_EXTERN int uv_set_process_title(const char* title); -UV_EXTERN int uv_resident_set_memory(size_t* rss); -UV_EXTERN int uv_uptime(double* uptime); - -/* - * This allocates cpu_infos array, and sets count. The array - * is freed using uv_free_cpu_info(). - */ -UV_EXTERN int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count); -UV_EXTERN void uv_free_cpu_info(uv_cpu_info_t* cpu_infos, int count); - -/* - * This allocates addresses array, and sets count. The array - * is freed using uv_free_interface_addresses(). - */ -UV_EXTERN int uv_interface_addresses(uv_interface_address_t** addresses, - int* count); -UV_EXTERN void uv_free_interface_addresses(uv_interface_address_t* addresses, - int count); - -/* - * File System Methods. - * - * The uv_fs_* functions execute a blocking system call asynchronously (in a - * thread pool) and call the specified callback in the specified loop after - * completion. If the user gives NULL as the callback the blocking system - * call will be called synchronously. req should be a pointer to an - * uninitialized uv_fs_t object. - * - * uv_fs_req_cleanup() must be called after completion of the uv_fs_ - * function to free any internal memory allocations associated with the - * request. - */ - -typedef enum { - UV_FS_UNKNOWN = -1, - UV_FS_CUSTOM, - UV_FS_OPEN, - UV_FS_CLOSE, - UV_FS_READ, - UV_FS_WRITE, - UV_FS_SENDFILE, - UV_FS_STAT, - UV_FS_LSTAT, - UV_FS_FSTAT, - UV_FS_FTRUNCATE, - UV_FS_UTIME, - UV_FS_FUTIME, - UV_FS_CHMOD, - UV_FS_FCHMOD, - UV_FS_FSYNC, - UV_FS_FDATASYNC, - UV_FS_UNLINK, - UV_FS_RMDIR, - UV_FS_MKDIR, - UV_FS_RENAME, - UV_FS_READDIR, - UV_FS_LINK, - UV_FS_SYMLINK, - UV_FS_READLINK, - UV_FS_CHOWN, - UV_FS_FCHOWN -} uv_fs_type; - -/* uv_fs_t is a subclass of uv_req_t */ -struct uv_fs_s { - UV_REQ_FIELDS - uv_fs_type fs_type; - uv_loop_t* loop; - uv_fs_cb cb; - ssize_t result; - void* ptr; - const char* path; - uv_stat_t statbuf; /* Stores the result of uv_fs_stat and uv_fs_fstat. */ - UV_FS_PRIVATE_FIELDS -}; - -UV_EXTERN void uv_fs_req_cleanup(uv_fs_t* req); - -UV_EXTERN int uv_fs_close(uv_loop_t* loop, uv_fs_t* req, uv_file file, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_open(uv_loop_t* loop, uv_fs_t* req, const char* path, - int flags, int mode, uv_fs_cb cb); - -UV_EXTERN int uv_fs_read(uv_loop_t* loop, uv_fs_t* req, uv_file file, - void* buf, size_t length, int64_t offset, uv_fs_cb cb); - -UV_EXTERN int uv_fs_unlink(uv_loop_t* loop, uv_fs_t* req, const char* path, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_write(uv_loop_t* loop, uv_fs_t* req, uv_file file, - const void* buf, size_t length, int64_t offset, uv_fs_cb cb); - -UV_EXTERN int uv_fs_mkdir(uv_loop_t* loop, uv_fs_t* req, const char* path, - int mode, uv_fs_cb cb); - -UV_EXTERN int uv_fs_rmdir(uv_loop_t* loop, uv_fs_t* req, const char* path, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_readdir(uv_loop_t* loop, uv_fs_t* req, - const char* path, int flags, uv_fs_cb cb); - -UV_EXTERN int uv_fs_stat(uv_loop_t* loop, uv_fs_t* req, const char* path, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_fstat(uv_loop_t* loop, uv_fs_t* req, uv_file file, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_rename(uv_loop_t* loop, uv_fs_t* req, const char* path, - const char* new_path, uv_fs_cb cb); - -UV_EXTERN int uv_fs_fsync(uv_loop_t* loop, uv_fs_t* req, uv_file file, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_ftruncate(uv_loop_t* loop, uv_fs_t* req, uv_file file, - int64_t offset, uv_fs_cb cb); - -UV_EXTERN int uv_fs_sendfile(uv_loop_t* loop, uv_fs_t* req, uv_file out_fd, - uv_file in_fd, int64_t in_offset, size_t length, uv_fs_cb cb); - -UV_EXTERN int uv_fs_chmod(uv_loop_t* loop, uv_fs_t* req, const char* path, - int mode, uv_fs_cb cb); - -UV_EXTERN int uv_fs_utime(uv_loop_t* loop, uv_fs_t* req, const char* path, - double atime, double mtime, uv_fs_cb cb); - -UV_EXTERN int uv_fs_futime(uv_loop_t* loop, uv_fs_t* req, uv_file file, - double atime, double mtime, uv_fs_cb cb); - -UV_EXTERN int uv_fs_lstat(uv_loop_t* loop, uv_fs_t* req, const char* path, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_link(uv_loop_t* loop, uv_fs_t* req, const char* path, - const char* new_path, uv_fs_cb cb); - -/* - * This flag can be used with uv_fs_symlink on Windows - * to specify whether path argument points to a directory. - */ -#define UV_FS_SYMLINK_DIR 0x0001 - -/* - * This flag can be used with uv_fs_symlink on Windows - * to specify whether the symlink is to be created using junction points. - */ -#define UV_FS_SYMLINK_JUNCTION 0x0002 - -UV_EXTERN int uv_fs_symlink(uv_loop_t* loop, uv_fs_t* req, const char* path, - const char* new_path, int flags, uv_fs_cb cb); - -UV_EXTERN int uv_fs_readlink(uv_loop_t* loop, uv_fs_t* req, const char* path, - uv_fs_cb cb); - -UV_EXTERN int uv_fs_fchmod(uv_loop_t* loop, uv_fs_t* req, uv_file file, - int mode, uv_fs_cb cb); - -UV_EXTERN int uv_fs_chown(uv_loop_t* loop, uv_fs_t* req, const char* path, - uv_uid_t uid, uv_gid_t gid, uv_fs_cb cb); - -UV_EXTERN int uv_fs_fchown(uv_loop_t* loop, uv_fs_t* req, uv_file file, - uv_uid_t uid, uv_gid_t gid, uv_fs_cb cb); - - -enum uv_fs_event { - UV_RENAME = 1, - UV_CHANGE = 2 -}; - - -struct uv_fs_event_s { - UV_HANDLE_FIELDS - char* filename; - UV_FS_EVENT_PRIVATE_FIELDS -}; - - -/* - * uv_fs_stat() based polling file watcher. - */ -struct uv_fs_poll_s { - UV_HANDLE_FIELDS - /* Private, don't touch. */ - void* poll_ctx; -}; - -UV_EXTERN int uv_fs_poll_init(uv_loop_t* loop, uv_fs_poll_t* handle); - -/* - * Check the file at `path` for changes every `interval` milliseconds. - * - * Your callback is invoked with `status < 0` if `path` does not exist - * or is inaccessible. The watcher is *not* stopped but your callback is - * not called again until something changes (e.g. when the file is created - * or the error reason changes). - * - * When `status == 0`, your callback receives pointers to the old and new - * `uv_stat_t` structs. They are valid for the duration of the callback - * only! - * - * For maximum portability, use multi-second intervals. Sub-second intervals - * will not detect all changes on many file systems. - */ -UV_EXTERN int uv_fs_poll_start(uv_fs_poll_t* handle, - uv_fs_poll_cb poll_cb, - const char* path, - unsigned int interval); - -UV_EXTERN int uv_fs_poll_stop(uv_fs_poll_t* handle); - - -/* - * UNIX signal handling on a per-event loop basis. The implementation is not - * ultra efficient so don't go creating a million event loops with a million - * signal watchers. - * - * Note to Linux users: SIGRT0 and SIGRT1 (signals 32 and 33) are used by the - * NPTL pthreads library to manage threads. Installing watchers for those - * signals will lead to unpredictable behavior and is strongly discouraged. - * Future versions of libuv may simply reject them. - * - * Some signal support is available on Windows: - * - * SIGINT is normally delivered when the user presses CTRL+C. However, like - * on Unix, it is not generated when terminal raw mode is enabled. - * - * SIGBREAK is delivered when the user pressed CTRL+BREAK. - * - * SIGHUP is generated when the user closes the console window. On SIGHUP the - * program is given approximately 10 seconds to perform cleanup. After that - * Windows will unconditionally terminate it. - * - * SIGWINCH is raised whenever libuv detects that the console has been - * resized. SIGWINCH is emulated by libuv when the program uses an uv_tty_t - * handle to write to the console. SIGWINCH may not always be delivered in a - * timely manner; libuv will only detect size changes when the cursor is - * being moved. When a readable uv_tty_handle is used in raw mode, resizing - * the console buffer will also trigger a SIGWINCH signal. - * - * Watchers for other signals can be successfully created, but these signals - * are never generated. These signals are: SIGILL, SIGABRT, SIGFPE, SIGSEGV, - * SIGTERM and SIGKILL. - * - * Note that calls to raise() or abort() to programmatically raise a signal are - * not detected by libuv; these will not trigger a signal watcher. - */ -struct uv_signal_s { - UV_HANDLE_FIELDS - uv_signal_cb signal_cb; - int signum; - UV_SIGNAL_PRIVATE_FIELDS -}; - -UV_EXTERN int uv_signal_init(uv_loop_t* loop, uv_signal_t* handle); - -UV_EXTERN int uv_signal_start(uv_signal_t* handle, - uv_signal_cb signal_cb, - int signum); - -UV_EXTERN int uv_signal_stop(uv_signal_t* handle); - - -/* - * Gets load average. - * See: http://en.wikipedia.org/wiki/Load_(computing) - * Returns [0,0,0] on Windows. - */ -UV_EXTERN void uv_loadavg(double avg[3]); - - -/* - * Flags to be passed to uv_fs_event_init. - */ -enum uv_fs_event_flags { - /* - * By default, if the fs event watcher is given a directory name, we will - * watch for all events in that directory. This flags overrides this behavior - * and makes fs_event report only changes to the directory entry itself. This - * flag does not affect individual files watched. - * This flag is currently not implemented yet on any backend. - */ - UV_FS_EVENT_WATCH_ENTRY = 1, - - /* - * By default uv_fs_event will try to use a kernel interface such as inotify - * or kqueue to detect events. This may not work on remote filesystems such - * as NFS mounts. This flag makes fs_event fall back to calling stat() on a - * regular interval. - * This flag is currently not implemented yet on any backend. - */ - UV_FS_EVENT_STAT = 2, - - /* - * By default, event watcher, when watching directory, is not registering - * (is ignoring) changes in it's subdirectories. - * This flag will override this behaviour on platforms that support it. - */ - UV_FS_EVENT_RECURSIVE = 3 -}; - - -UV_EXTERN int uv_fs_event_init(uv_loop_t* loop, uv_fs_event_t* handle, - const char* filename, uv_fs_event_cb cb, int flags); - -/* Utility */ - -/* Convert string ip addresses to binary structures */ -UV_EXTERN struct sockaddr_in uv_ip4_addr(const char* ip, int port); -UV_EXTERN struct sockaddr_in6 uv_ip6_addr(const char* ip, int port); - -/* Convert binary addresses to strings */ -UV_EXTERN int uv_ip4_name(struct sockaddr_in* src, char* dst, size_t size); -UV_EXTERN int uv_ip6_name(struct sockaddr_in6* src, char* dst, size_t size); - -/* Cross-platform IPv6-capable implementation of the 'standard' inet_ntop */ -/* and inet_pton functions. On success they return 0. If an error */ -/* the target of the `dst` pointer is unmodified. */ -UV_EXTERN int uv_inet_ntop(int af, const void* src, char* dst, size_t size); -UV_EXTERN int uv_inet_pton(int af, const char* src, void* dst); - -/* Gets the executable path */ -UV_EXTERN int uv_exepath(char* buffer, size_t* size); - -/* Gets the current working directory */ -UV_EXTERN int uv_cwd(char* buffer, size_t size); - -/* Changes the current working directory */ -UV_EXTERN int uv_chdir(const char* dir); - -/* Gets memory info in bytes */ -UV_EXTERN uint64_t uv_get_free_memory(void); -UV_EXTERN uint64_t uv_get_total_memory(void); - -/* - * Returns the current high-resolution real time. This is expressed in - * nanoseconds. It is relative to an arbitrary time in the past. It is not - * related to the time of day and therefore not subject to clock drift. The - * primary use is for measuring performance between intervals. - * - * Note not every platform can support nanosecond resolution; however, this - * value will always be in nanoseconds. - */ -UV_EXTERN extern uint64_t uv_hrtime(void); - - -/* - * Disables inheritance for file descriptors / handles that this process - * inherited from its parent. The effect is that child processes spawned by - * this process don't accidentally inherit these handles. - * - * It is recommended to call this function as early in your program as possible, - * before the inherited file descriptors can be closed or duplicated. - * - * Note that this function works on a best-effort basis: there is no guarantee - * that libuv can discover all file descriptors that were inherited. In general - * it does a better job on Windows than it does on unix. - */ -UV_EXTERN void uv_disable_stdio_inheritance(void); - -/* - * Opens a shared library. The filename is in utf-8. Returns 0 on success and - * -1 on error. Call `uv_dlerror(uv_lib_t*)` to get the error message. - */ -UV_EXTERN int uv_dlopen(const char* filename, uv_lib_t* lib); - -/* - * Close the shared library. - */ -UV_EXTERN void uv_dlclose(uv_lib_t* lib); - -/* - * Retrieves a data pointer from a dynamic library. It is legal for a symbol to - * map to NULL. Returns 0 on success and -1 if the symbol was not found. - */ -UV_EXTERN int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr); - -/* - * Returns the last uv_dlopen() or uv_dlsym() error message. - */ -UV_EXTERN const char* uv_dlerror(uv_lib_t* lib); - -/* - * The mutex functions return 0 on success or an error code < 0 - * (unless the return type is void, of course). - */ -UV_EXTERN int uv_mutex_init(uv_mutex_t* handle); -UV_EXTERN void uv_mutex_destroy(uv_mutex_t* handle); -UV_EXTERN void uv_mutex_lock(uv_mutex_t* handle); -UV_EXTERN int uv_mutex_trylock(uv_mutex_t* handle); -UV_EXTERN void uv_mutex_unlock(uv_mutex_t* handle); - -/* - * Same goes for the read/write lock functions. - */ -UV_EXTERN int uv_rwlock_init(uv_rwlock_t* rwlock); -UV_EXTERN void uv_rwlock_destroy(uv_rwlock_t* rwlock); -UV_EXTERN void uv_rwlock_rdlock(uv_rwlock_t* rwlock); -UV_EXTERN int uv_rwlock_tryrdlock(uv_rwlock_t* rwlock); -UV_EXTERN void uv_rwlock_rdunlock(uv_rwlock_t* rwlock); -UV_EXTERN void uv_rwlock_wrlock(uv_rwlock_t* rwlock); -UV_EXTERN int uv_rwlock_trywrlock(uv_rwlock_t* rwlock); -UV_EXTERN void uv_rwlock_wrunlock(uv_rwlock_t* rwlock); - -/* - * Same goes for the semaphore functions. - */ -UV_EXTERN int uv_sem_init(uv_sem_t* sem, unsigned int value); -UV_EXTERN void uv_sem_destroy(uv_sem_t* sem); -UV_EXTERN void uv_sem_post(uv_sem_t* sem); -UV_EXTERN void uv_sem_wait(uv_sem_t* sem); -UV_EXTERN int uv_sem_trywait(uv_sem_t* sem); - -/* - * Same goes for the condition variable functions. - */ -UV_EXTERN int uv_cond_init(uv_cond_t* cond); -UV_EXTERN void uv_cond_destroy(uv_cond_t* cond); -UV_EXTERN void uv_cond_signal(uv_cond_t* cond); -UV_EXTERN void uv_cond_broadcast(uv_cond_t* cond); -/* Waits on a condition variable without a timeout. - * - * Note: - * 1. callers should be prepared to deal with spurious wakeups. - */ -UV_EXTERN void uv_cond_wait(uv_cond_t* cond, uv_mutex_t* mutex); -/* Waits on a condition variable with a timeout in nano seconds. - * Returns 0 for success or UV_ETIMEDOUT on timeout, It aborts when other - * errors happen. - * - * Note: - * 1. callers should be prepared to deal with spurious wakeups. - * 2. the granularity of timeout on Windows is never less than one millisecond. - * 3. uv_cond_timedwait takes a relative timeout, not an absolute time. - */ -UV_EXTERN int uv_cond_timedwait(uv_cond_t* cond, uv_mutex_t* mutex, - uint64_t timeout); - -UV_EXTERN int uv_barrier_init(uv_barrier_t* barrier, unsigned int count); -UV_EXTERN void uv_barrier_destroy(uv_barrier_t* barrier); -UV_EXTERN void uv_barrier_wait(uv_barrier_t* barrier); - -/* Runs a function once and only once. Concurrent calls to uv_once() with the - * same guard will block all callers except one (it's unspecified which one). - * The guard should be initialized statically with the UV_ONCE_INIT macro. - */ -UV_EXTERN void uv_once(uv_once_t* guard, void (*callback)(void)); - -UV_EXTERN int uv_thread_create(uv_thread_t *tid, - void (*entry)(void *arg), void *arg); -UV_EXTERN unsigned long uv_thread_self(void); -UV_EXTERN int uv_thread_join(uv_thread_t *tid); - -/* The presence of these unions force similar struct layout. */ -#define XX(_, name) uv_ ## name ## _t name; -union uv_any_handle { - UV_HANDLE_TYPE_MAP(XX) -}; - -union uv_any_req { - UV_REQ_TYPE_MAP(XX) -}; -#undef XX - - -struct uv_loop_s { - /* User data - use this for whatever. */ - void* data; - /* Loop reference counting */ - unsigned int active_handles; - void* handle_queue[2]; - void* active_reqs[2]; - /* Internal flag to signal loop stop */ - unsigned int stop_flag; - UV_LOOP_PRIVATE_FIELDS -}; - - -/* Don't export the private CPP symbols. */ -#undef UV_HANDLE_TYPE_PRIVATE -#undef UV_REQ_TYPE_PRIVATE -#undef UV_REQ_PRIVATE_FIELDS -#undef UV_STREAM_PRIVATE_FIELDS -#undef UV_TCP_PRIVATE_FIELDS -#undef UV_PREPARE_PRIVATE_FIELDS -#undef UV_CHECK_PRIVATE_FIELDS -#undef UV_IDLE_PRIVATE_FIELDS -#undef UV_ASYNC_PRIVATE_FIELDS -#undef UV_TIMER_PRIVATE_FIELDS -#undef UV_GETADDRINFO_PRIVATE_FIELDS -#undef UV_FS_REQ_PRIVATE_FIELDS -#undef UV_WORK_PRIVATE_FIELDS -#undef UV_FS_EVENT_PRIVATE_FIELDS -#undef UV_SIGNAL_PRIVATE_FIELDS -#undef UV_LOOP_PRIVATE_FIELDS -#undef UV_LOOP_PRIVATE_PLATFORM_FIELDS - -#ifdef __cplusplus -} -#endif -#endif /* UV_H */ +/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +/* See http://nikhilm.github.com/uvbook/ for an introduction. */ + +#ifndef UV_H +#define UV_H +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef _WIN32 + /* Windows - set up dll import/export decorators. */ +# if defined(BUILDING_UV_SHARED) + /* Building shared library. */ +# define UV_EXTERN __declspec(dllexport) +# elif defined(USING_UV_SHARED) + /* Using shared library. */ +# define UV_EXTERN __declspec(dllimport) +# else + /* Building static library. */ +# define UV_EXTERN /* nothing */ +# endif +#elif __GNUC__ >= 4 +# define UV_EXTERN __attribute__((visibility("default"))) +#else +# define UV_EXTERN /* nothing */ +#endif + +#include "uv-errno.h" + +#if defined(_MSC_VER) && _MSC_VER < 1600 +# include "stdint-msvc2008.h" +#else +# include <stdint.h> +#endif + +#include <sys/types.h> /* size_t */ + +#if defined(__SVR4) && !defined(__unix__) +# define __unix__ +#endif + +#if defined(__unix__) || defined(__POSIX__) || \ + defined(__APPLE__) || defined(_AIX) +# include "uv-unix.h" +#else +# include "uv-win.h" +#endif + +/* Expand this list if necessary. */ +#define UV_ERRNO_MAP(XX) \ + XX(EACCES, "permission denied") \ + XX(EADDRINUSE, "address already in use") \ + XX(EADDRNOTAVAIL, "address not available") \ + XX(EAFNOSUPPORT, "address family not supported") \ + XX(EAGAIN, "resource temporarily unavailable") \ + XX(EAI_ADDRFAMILY, "address family not supported") \ + XX(EAI_AGAIN, "temporary failure") \ + XX(EAI_BADFLAGS, "bad ai_flags value") \ + XX(EAI_CANCELED, "request canceled") \ + XX(EAI_FAIL, "permanent failure") \ + XX(EAI_FAMILY, "ai_family not supported") \ + XX(EAI_MEMORY, "out of memory") \ + XX(EAI_NODATA, "no address") \ + XX(EAI_NONAME, "unknown node or service") \ + XX(EAI_SERVICE, "service not available for socket type") \ + XX(EAI_SOCKTYPE, "socket type not supported") \ + XX(EAI_SYSTEM, "system error") \ + XX(EALREADY, "connection already in progress") \ + XX(EBADF, "bad file descriptor") \ + XX(EBUSY, "resource busy or locked") \ + XX(ECANCELED, "operation canceled") \ + XX(ECHARSET, "invalid Unicode character") \ + XX(ECONNABORTED, "software caused connection abort") \ + XX(ECONNREFUSED, "connection refused") \ + XX(ECONNRESET, "connection reset by peer") \ + XX(EDESTADDRREQ, "destination address required") \ + XX(EEXIST, "file already exists") \ + XX(EFAULT, "bad address in system call argument") \ + XX(EHOSTUNREACH, "host is unreachable") \ + XX(EINTR, "interrupted system call") \ + XX(EINVAL, "invalid argument") \ + XX(EIO, "i/o error") \ + XX(EISCONN, "socket is already connected") \ + XX(EISDIR, "illegal operation on a directory") \ + XX(ELOOP, "too many symbolic links encountered") \ + XX(EMFILE, "too many open files") \ + XX(EMSGSIZE, "message too long") \ + XX(ENAMETOOLONG, "name too long") \ + XX(ENETDOWN, "network is down") \ + XX(ENETUNREACH, "network is unreachable") \ + XX(ENFILE, "file table overflow") \ + XX(ENOBUFS, "no buffer space available") \ + XX(ENODEV, "no such device") \ + XX(ENOENT, "no such file or directory") \ + XX(ENOMEM, "not enough memory") \ + XX(ENONET, "machine is not on the network") \ + XX(ENOSPC, "no space left on device") \ + XX(ENOSYS, "function not implemented") \ + XX(ENOTCONN, "socket is not connected") \ + XX(ENOTDIR, "not a directory") \ + XX(ENOTEMPTY, "directory not empty") \ + XX(ENOTSOCK, "socket operation on non-socket") \ + XX(ENOTSUP, "operation not supported on socket") \ + XX(EPERM, "operation not permitted") \ + XX(EPIPE, "broken pipe") \ + XX(EPROTO, "protocol error") \ + XX(EPROTONOSUPPORT, "protocol not supported") \ + XX(EPROTOTYPE, "protocol wrong type for socket") \ + XX(EROFS, "read-only file system") \ + XX(ESHUTDOWN, "cannot send after transport endpoint shutdown") \ + XX(ESPIPE, "invalid seek") \ + XX(ESRCH, "no such process") \ + XX(ETIMEDOUT, "connection timed out") \ + XX(EXDEV, "cross-device link not permitted") \ + XX(UNKNOWN, "unknown error") \ + XX(EOF, "end of file") \ + +#define UV_HANDLE_TYPE_MAP(XX) \ + XX(ASYNC, async) \ + XX(CHECK, check) \ + XX(FS_EVENT, fs_event) \ + XX(FS_POLL, fs_poll) \ + XX(HANDLE, handle) \ + XX(IDLE, idle) \ + XX(NAMED_PIPE, pipe) \ + XX(POLL, poll) \ + XX(PREPARE, prepare) \ + XX(PROCESS, process) \ + XX(STREAM, stream) \ + XX(TCP, tcp) \ + XX(TIMER, timer) \ + XX(TTY, tty) \ + XX(UDP, udp) \ + XX(SIGNAL, signal) \ + +#define UV_REQ_TYPE_MAP(XX) \ + XX(REQ, req) \ + XX(CONNECT, connect) \ + XX(WRITE, write) \ + XX(SHUTDOWN, shutdown) \ + XX(UDP_SEND, udp_send) \ + XX(FS, fs) \ + XX(WORK, work) \ + XX(GETADDRINFO, getaddrinfo) \ + +typedef enum { +#define XX(code, _) UV_ ## code = UV__ ## code, + UV_ERRNO_MAP(XX) +#undef XX + UV_ERRNO_MAX = UV__EOF - 1 +} uv_errno_t; + +typedef enum { + UV_UNKNOWN_HANDLE = 0, +#define XX(uc, lc) UV_##uc, + UV_HANDLE_TYPE_MAP(XX) +#undef XX + UV_FILE, + UV_HANDLE_TYPE_MAX +} uv_handle_type; + +typedef enum { + UV_UNKNOWN_REQ = 0, +#define XX(uc, lc) UV_##uc, + UV_REQ_TYPE_MAP(XX) +#undef XX + UV_REQ_TYPE_PRIVATE + UV_REQ_TYPE_MAX +} uv_req_type; + + +/* Handle types. */ +typedef struct uv_loop_s uv_loop_t; +typedef struct uv_handle_s uv_handle_t; +typedef struct uv_stream_s uv_stream_t; +typedef struct uv_tcp_s uv_tcp_t; +typedef struct uv_udp_s uv_udp_t; +typedef struct uv_pipe_s uv_pipe_t; +typedef struct uv_tty_s uv_tty_t; +typedef struct uv_poll_s uv_poll_t; +typedef struct uv_timer_s uv_timer_t; +typedef struct uv_prepare_s uv_prepare_t; +typedef struct uv_check_s uv_check_t; +typedef struct uv_idle_s uv_idle_t; +typedef struct uv_async_s uv_async_t; +typedef struct uv_process_s uv_process_t; +typedef struct uv_fs_event_s uv_fs_event_t; +typedef struct uv_fs_poll_s uv_fs_poll_t; +typedef struct uv_signal_s uv_signal_t; + +/* Request types. */ +typedef struct uv_req_s uv_req_t; +typedef struct uv_getaddrinfo_s uv_getaddrinfo_t; +typedef struct uv_shutdown_s uv_shutdown_t; +typedef struct uv_write_s uv_write_t; +typedef struct uv_connect_s uv_connect_t; +typedef struct uv_udp_send_s uv_udp_send_t; +typedef struct uv_fs_s uv_fs_t; +typedef struct uv_work_s uv_work_t; + +/* None of the above. */ +typedef struct uv_cpu_info_s uv_cpu_info_t; +typedef struct uv_interface_address_s uv_interface_address_t; + + +typedef enum { + UV_RUN_DEFAULT = 0, + UV_RUN_ONCE, + UV_RUN_NOWAIT +} uv_run_mode; + + +/* + * Returns the libuv version packed into a single integer. 8 bits are used for + * each component, with the patch number stored in the 8 least significant + * bits. E.g. for libuv 1.2.3 this would return 0x010203. + */ +UV_EXTERN unsigned int uv_version(void); + +/* + * Returns the libuv version number as a string. For non-release versions + * "-pre" is appended, so the version number could be "1.2.3-pre". + */ +UV_EXTERN const char* uv_version_string(void); + + +/* + * This function must be called before any other functions in libuv. + * + * All functions besides uv_run() are non-blocking. + * + * All callbacks in libuv are made asynchronously. That is they are never + * made by the function that takes them as a parameter. + */ +UV_EXTERN uv_loop_t* uv_loop_new(void); +UV_EXTERN void uv_loop_delete(uv_loop_t*); + +/* + * Returns the default loop. + */ +UV_EXTERN uv_loop_t* uv_default_loop(void); + +/* + * This function runs the event loop. It will act differently depending on the + * specified mode: + * - UV_RUN_DEFAULT: Runs the event loop until the reference count drops to + * zero. Always returns zero. + * - UV_RUN_ONCE: Poll for new events once. Note that this function blocks if + * there are no pending events. Returns zero when done (no active handles + * or requests left), or non-zero if more events are expected (meaning you + * should run the event loop again sometime in the future). + * - UV_RUN_NOWAIT: Poll for new events once but don't block if there are no + * pending events. + */ +UV_EXTERN int uv_run(uv_loop_t*, uv_run_mode mode); + +/* + * This function will stop the event loop by forcing uv_run to end + * as soon as possible, but not sooner than the next loop iteration. + * If this function was called before blocking for i/o, the loop won't + * block for i/o on this iteration. + */ +UV_EXTERN void uv_stop(uv_loop_t*); + +/* + * Manually modify the event loop's reference count. Useful if the user wants + * to have a handle or timeout that doesn't keep the loop alive. + */ +UV_EXTERN void uv_ref(uv_handle_t*); +UV_EXTERN void uv_unref(uv_handle_t*); +UV_EXTERN int uv_has_ref(const uv_handle_t*); + +/* + * Update the event loop's concept of "now". Libuv caches the current time + * at the start of the event loop tick in order to reduce the number of + * time-related system calls. + * + * You won't normally need to call this function unless you have callbacks + * that block the event loop for longer periods of time, where "longer" is + * somewhat subjective but probably on the order of a millisecond or more. + */ +UV_EXTERN void uv_update_time(uv_loop_t*); + +/* + * Return the current timestamp in milliseconds. The timestamp is cached at + * the start of the event loop tick, see |uv_update_time()| for details and + * rationale. + * + * The timestamp increases monotonically from some arbitrary point in time. + * Don't make assumptions about the starting point, you will only get + * disappointed. + * + * Use uv_hrtime() if you need sub-milliseond granularity. + */ +UV_EXTERN uint64_t uv_now(uv_loop_t*); + +/* + * Get backend file descriptor. Only kqueue, epoll and event ports are + * supported. + * + * This can be used in conjunction with `uv_run(loop, UV_RUN_NOWAIT)` to + * poll in one thread and run the event loop's event callbacks in another. + * + * Useful for embedding libuv's event loop in another event loop. + * See test/test-embed.c for an example. + * + * Note that embedding a kqueue fd in another kqueue pollset doesn't work on + * all platforms. It's not an error to add the fd but it never generates + * events. + */ +UV_EXTERN int uv_backend_fd(const uv_loop_t*); + +/* + * Get the poll timeout. The return value is in milliseconds, or -1 for no + * timeout. + */ +UV_EXTERN int uv_backend_timeout(const uv_loop_t*); + + +/* + * Should return a buffer that libuv can use to read data into. + * + * `suggested_size` is a hint. Returning a buffer that is smaller is perfectly + * okay as long as `buf.len > 0`. + * + * If you return a buffer with `buf.len == 0`, libuv skips the read and calls + * your read or recv callback with nread=UV_ENOBUFS. + * + * Note that returning a zero-length buffer does not stop the handle, call + * uv_read_stop() or uv_udp_recv_stop() for that. + */ +typedef uv_buf_t (*uv_alloc_cb)(uv_handle_t* handle, size_t suggested_size); + +/* + * `nread` is > 0 if there is data available, 0 if libuv is done reading for + * now, or < 0 on error. + * + * The callee is responsible for closing the stream when an error happens. + * Trying to read from the stream again is undefined. + * + * The callee is responsible for freeing the buffer, libuv does not reuse it. + * The buffer may be a null buffer (where buf.base=NULL and buf.len=0) on EOF + * or error. + */ +typedef void (*uv_read_cb)(uv_stream_t* stream, ssize_t nread, uv_buf_t buf); + +/* + * Just like the uv_read_cb except that if the pending parameter is true + * then you can use uv_accept() to pull the new handle into the process. + * If no handle is pending then pending will be UV_UNKNOWN_HANDLE. + */ +typedef void (*uv_read2_cb)(uv_pipe_t* pipe, ssize_t nread, uv_buf_t buf, + uv_handle_type pending); + +typedef void (*uv_write_cb)(uv_write_t* req, int status); +typedef void (*uv_connect_cb)(uv_connect_t* req, int status); +typedef void (*uv_shutdown_cb)(uv_shutdown_t* req, int status); +typedef void (*uv_connection_cb)(uv_stream_t* server, int status); +typedef void (*uv_close_cb)(uv_handle_t* handle); +typedef void (*uv_poll_cb)(uv_poll_t* handle, int status, int events); +typedef void (*uv_timer_cb)(uv_timer_t* handle, int status); +/* TODO: do these really need a status argument? */ +typedef void (*uv_async_cb)(uv_async_t* handle, int status); +typedef void (*uv_prepare_cb)(uv_prepare_t* handle, int status); +typedef void (*uv_check_cb)(uv_check_t* handle, int status); +typedef void (*uv_idle_cb)(uv_idle_t* handle, int status); +typedef void (*uv_exit_cb)(uv_process_t*, int exit_status, int term_signal); +typedef void (*uv_walk_cb)(uv_handle_t* handle, void* arg); +typedef void (*uv_fs_cb)(uv_fs_t* req); +typedef void (*uv_work_cb)(uv_work_t* req); +typedef void (*uv_after_work_cb)(uv_work_t* req, int status); +typedef void (*uv_getaddrinfo_cb)(uv_getaddrinfo_t* req, + int status, + struct addrinfo* res); + +typedef struct { + long tv_sec; + long tv_nsec; +} uv_timespec_t; + + +typedef struct { + uint64_t st_dev; + uint64_t st_mode; + uint64_t st_nlink; + uint64_t st_uid; + uint64_t st_gid; + uint64_t st_rdev; + uint64_t st_ino; + uint64_t st_size; + uint64_t st_blksize; + uint64_t st_blocks; + uint64_t st_flags; + uint64_t st_gen; + uv_timespec_t st_atim; + uv_timespec_t st_mtim; + uv_timespec_t st_ctim; + uv_timespec_t st_birthtim; +} uv_stat_t; + + +/* +* This will be called repeatedly after the uv_fs_event_t is initialized. +* If uv_fs_event_t was initialized with a directory the filename parameter +* will be a relative path to a file contained in the directory. +* The events parameter is an ORed mask of enum uv_fs_event elements. +*/ +typedef void (*uv_fs_event_cb)(uv_fs_event_t* handle, const char* filename, + int events, int status); + +typedef void (*uv_fs_poll_cb)(uv_fs_poll_t* handle, + int status, + const uv_stat_t* prev, + const uv_stat_t* curr); + +typedef void (*uv_signal_cb)(uv_signal_t* handle, int signum); + + +typedef enum { + UV_LEAVE_GROUP = 0, + UV_JOIN_GROUP +} uv_membership; + + +/* + * Most functions return 0 on success or an error code < 0 on failure. + */ +UV_EXTERN const char* uv_strerror(int err); +UV_EXTERN const char* uv_err_name(int err); + + +#define UV_REQ_FIELDS \ + /* public */ \ + void* data; \ + /* read-only */ \ + uv_req_type type; \ + /* private */ \ + void* active_queue[2]; \ + UV_REQ_PRIVATE_FIELDS \ + +/* Abstract base class of all requests. */ +struct uv_req_s { + UV_REQ_FIELDS +}; + + +/* Platform-specific request types */ +UV_PRIVATE_REQ_TYPES + + +/* + * uv_shutdown_t is a subclass of uv_req_t + * + * Shutdown the outgoing (write) side of a duplex stream. It waits for + * pending write requests to complete. The handle should refer to a + * initialized stream. req should be an uninitialized shutdown request + * struct. The cb is called after shutdown is complete. + */ +UV_EXTERN int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle, + uv_shutdown_cb cb); + +struct uv_shutdown_s { + UV_REQ_FIELDS + uv_stream_t* handle; + uv_shutdown_cb cb; + UV_SHUTDOWN_PRIVATE_FIELDS +}; + + +#define UV_HANDLE_FIELDS \ + /* public */ \ + uv_close_cb close_cb; \ + void* data; \ + /* read-only */ \ + uv_loop_t* loop; \ + uv_handle_type type; \ + /* private */ \ + void* handle_queue[2]; \ + UV_HANDLE_PRIVATE_FIELDS \ + +/* The abstract base class of all handles. */ +struct uv_handle_s { + UV_HANDLE_FIELDS +}; + +/* + * Returns size of various handle types, useful for FFI + * bindings to allocate correct memory without copying struct + * definitions + */ +UV_EXTERN size_t uv_handle_size(uv_handle_type type); + +/* + * Returns size of request types, useful for dynamic lookup with FFI + */ +UV_EXTERN size_t uv_req_size(uv_req_type type); + +/* + * Returns 1 if the prepare/check/idle/timer handle has been started, 0 + * otherwise. For other handle types this always returns 1. + */ +UV_EXTERN int uv_is_active(const uv_handle_t* handle); + +/* + * Walk the list of open handles. + */ +UV_EXTERN void uv_walk(uv_loop_t* loop, uv_walk_cb walk_cb, void* arg); + + +/* + * Request handle to be closed. close_cb will be called asynchronously after + * this call. This MUST be called on each handle before memory is released. + * + * Note that handles that wrap file descriptors are closed immediately but + * close_cb will still be deferred to the next iteration of the event loop. + * It gives you a chance to free up any resources associated with the handle. + * + * In-progress requests, like uv_connect_t or uv_write_t, are cancelled and + * have their callbacks called asynchronously with status=UV_ECANCELED. + */ +UV_EXTERN void uv_close(uv_handle_t* handle, uv_close_cb close_cb); + + +/* + * Constructor for uv_buf_t. + * Due to platform differences the user cannot rely on the ordering of the + * base and len members of the uv_buf_t struct. The user is responsible for + * freeing base after the uv_buf_t is done. Return struct passed by value. + */ +UV_EXTERN uv_buf_t uv_buf_init(char* base, unsigned int len); + + +/* + * Utility function. Copies up to `size` characters from `src` to `dst` + * and ensures that `dst` is properly NUL terminated unless `size` is zero. + */ +UV_EXTERN size_t uv_strlcpy(char* dst, const char* src, size_t size); + +/* + * Utility function. Appends `src` to `dst` and ensures that `dst` is + * properly NUL terminated unless `size` is zero or `dst` does not + * contain a NUL byte. `size` is the total length of `dst` so at most + * `size - strlen(dst) - 1` characters will be copied from `src`. + */ +UV_EXTERN size_t uv_strlcat(char* dst, const char* src, size_t size); + + +#define UV_STREAM_FIELDS \ + /* number of bytes queued for writing */ \ + size_t write_queue_size; \ + uv_alloc_cb alloc_cb; \ + uv_read_cb read_cb; \ + uv_read2_cb read2_cb; \ + /* private */ \ + UV_STREAM_PRIVATE_FIELDS + +/* + * uv_stream_t is a subclass of uv_handle_t + * + * uv_stream is an abstract class. + * + * uv_stream_t is the parent class of uv_tcp_t, uv_pipe_t, uv_tty_t, and + * soon uv_file_t. + */ +struct uv_stream_s { + UV_HANDLE_FIELDS + UV_STREAM_FIELDS +}; + +UV_EXTERN int uv_listen(uv_stream_t* stream, int backlog, uv_connection_cb cb); + +/* + * This call is used in conjunction with uv_listen() to accept incoming + * connections. Call uv_accept after receiving a uv_connection_cb to accept + * the connection. Before calling uv_accept use uv_*_init() must be + * called on the client. Non-zero return value indicates an error. + * + * When the uv_connection_cb is called it is guaranteed that uv_accept will + * complete successfully the first time. If you attempt to use it more than + * once, it may fail. It is suggested to only call uv_accept once per + * uv_connection_cb call. + */ +UV_EXTERN int uv_accept(uv_stream_t* server, uv_stream_t* client); + +/* + * Read data from an incoming stream. The callback will be made several + * times until there is no more data to read or uv_read_stop is called. + * When we've reached EOF nread will be set to UV_EOF. + * + * When nread < 0, the buf parameter might not point to a valid buffer; + * in that case buf.len and buf.base are both set to 0. + * + * Note that nread might also be 0, which does *not* indicate an error or + * eof; it happens when libuv requested a buffer through the alloc callback + * but then decided that it didn't need that buffer. + */ +UV_EXTERN int uv_read_start(uv_stream_t*, uv_alloc_cb alloc_cb, + uv_read_cb read_cb); + +UV_EXTERN int uv_read_stop(uv_stream_t*); + +/* + * Extended read methods for receiving handles over a pipe. The pipe must be + * initialized with ipc == 1. + */ +UV_EXTERN int uv_read2_start(uv_stream_t*, uv_alloc_cb alloc_cb, + uv_read2_cb read_cb); + + +/* + * Write data to stream. Buffers are written in order. Example: + * + * uv_buf_t a[] = { + * { .base = "1", .len = 1 }, + * { .base = "2", .len = 1 } + * }; + * + * uv_buf_t b[] = { + * { .base = "3", .len = 1 }, + * { .base = "4", .len = 1 } + * }; + * + * uv_write_t req1; + * uv_write_t req2; + * + * // writes "1234" + * uv_write(&req1, stream, a, 2); + * uv_write(&req2, stream, b, 2); + * + */ +UV_EXTERN int uv_write(uv_write_t* req, uv_stream_t* handle, + uv_buf_t bufs[], int bufcnt, uv_write_cb cb); + +/* + * Extended write function for sending handles over a pipe. The pipe must be + * initialized with ipc == 1. + * send_handle must be a TCP socket or pipe, which is a server or a connection + * (listening or connected state). Bound sockets or pipes will be assumed to + * be servers. + */ +UV_EXTERN int uv_write2(uv_write_t* req, uv_stream_t* handle, uv_buf_t bufs[], + int bufcnt, uv_stream_t* send_handle, uv_write_cb cb); + +/* uv_write_t is a subclass of uv_req_t */ +struct uv_write_s { + UV_REQ_FIELDS + uv_write_cb cb; + uv_stream_t* send_handle; + uv_stream_t* handle; + UV_WRITE_PRIVATE_FIELDS +}; + + +/* + * Used to determine whether a stream is readable or writable. + */ +UV_EXTERN int uv_is_readable(const uv_stream_t* handle); +UV_EXTERN int uv_is_writable(const uv_stream_t* handle); + + +/* + * Enable or disable blocking mode for a stream. + * + * When blocking mode is enabled all writes complete synchronously. The + * interface remains unchanged otherwise, e.g. completion or failure of the + * operation will still be reported through a callback which is made + * asychronously. + * + * Relying too much on this API is not recommended. It is likely to change + * significantly in the future. + * + * On windows this currently works only for uv_pipe_t instances. On unix it + * works for tcp, pipe and tty instances. Be aware that changing the blocking + * mode on unix sets or clears the O_NONBLOCK bit. If you are sharing a handle + * with another process, the other process is affected by the change too, + * which can lead to unexpected results. + * + * Also libuv currently makes no ordering guarantee when the blocking mode + * is changed after write requests have already been submitted. Therefore it is + * recommended to set the blocking mode immediately after opening or creating + * the stream. + */ +UV_EXTERN int uv_stream_set_blocking(uv_stream_t* handle, int blocking); + + +/* + * Used to determine whether a stream is closing or closed. + * + * N.B. is only valid between the initialization of the handle + * and the arrival of the close callback, and cannot be used + * to validate the handle. + */ +UV_EXTERN int uv_is_closing(const uv_handle_t* handle); + + +/* + * uv_tcp_t is a subclass of uv_stream_t + * + * Represents a TCP stream or TCP server. + */ +struct uv_tcp_s { + UV_HANDLE_FIELDS + UV_STREAM_FIELDS + UV_TCP_PRIVATE_FIELDS +}; + +UV_EXTERN int uv_tcp_init(uv_loop_t*, uv_tcp_t* handle); + +/* + * Opens an existing file descriptor or SOCKET as a tcp handle. + */ +UV_EXTERN int uv_tcp_open(uv_tcp_t* handle, uv_os_sock_t sock); + +/* Enable/disable Nagle's algorithm. */ +UV_EXTERN int uv_tcp_nodelay(uv_tcp_t* handle, int enable); + +/* + * Enable/disable TCP keep-alive. + * + * `delay` is the initial delay in seconds, ignored when `enable` is zero. + */ +UV_EXTERN int uv_tcp_keepalive(uv_tcp_t* handle, + int enable, + unsigned int delay); + +/* + * Enable/disable simultaneous asynchronous accept requests that are + * queued by the operating system when listening for new tcp connections. + * This setting is used to tune a tcp server for the desired performance. + * Having simultaneous accepts can significantly improve the rate of + * accepting connections (which is why it is enabled by default) but + * may lead to uneven load distribution in multi-process setups. + */ +UV_EXTERN int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable); + +UV_EXTERN int uv_tcp_bind(uv_tcp_t* handle, struct sockaddr_in); +UV_EXTERN int uv_tcp_bind6(uv_tcp_t* handle, struct sockaddr_in6); +UV_EXTERN int uv_tcp_getsockname(uv_tcp_t* handle, struct sockaddr* name, + int* namelen); +UV_EXTERN int uv_tcp_getpeername(uv_tcp_t* handle, struct sockaddr* name, + int* namelen); + +/* + * uv_tcp_connect, uv_tcp_connect6 + * These functions establish IPv4 and IPv6 TCP connections. Provide an + * initialized TCP handle and an uninitialized uv_connect_t*. The callback + * will be made when the connection is established. + */ +UV_EXTERN int uv_tcp_connect(uv_connect_t* req, uv_tcp_t* handle, + struct sockaddr_in address, uv_connect_cb cb); +UV_EXTERN int uv_tcp_connect6(uv_connect_t* req, uv_tcp_t* handle, + struct sockaddr_in6 address, uv_connect_cb cb); + +/* uv_connect_t is a subclass of uv_req_t */ +struct uv_connect_s { + UV_REQ_FIELDS + uv_connect_cb cb; + uv_stream_t* handle; + UV_CONNECT_PRIVATE_FIELDS +}; + + +/* + * UDP support. + */ + +enum uv_udp_flags { + /* Disables dual stack mode. Used with uv_udp_bind6(). */ + UV_UDP_IPV6ONLY = 1, + /* + * Indicates message was truncated because read buffer was too small. The + * remainder was discarded by the OS. Used in uv_udp_recv_cb. + */ + UV_UDP_PARTIAL = 2 +}; + +/* + * Called after a uv_udp_send() or uv_udp_send6(). status 0 indicates + * success otherwise error. + */ +typedef void (*uv_udp_send_cb)(uv_udp_send_t* req, int status); + +/* + * Callback that is invoked when a new UDP datagram is received. + * + * handle UDP handle. + * nread Number of bytes that have been received. + * 0 if there is no more data to read. You may + * discard or repurpose the read buffer. + * < 0 if a transmission error was detected. + * buf uv_buf_t with the received data. + * addr struct sockaddr_in or struct sockaddr_in6. + * Valid for the duration of the callback only. + * flags One or more OR'ed UV_UDP_* constants. + * Right now only UV_UDP_PARTIAL is used. + */ +typedef void (*uv_udp_recv_cb)(uv_udp_t* handle, ssize_t nread, uv_buf_t buf, + struct sockaddr* addr, unsigned flags); + +/* uv_udp_t is a subclass of uv_handle_t */ +struct uv_udp_s { + UV_HANDLE_FIELDS + UV_UDP_PRIVATE_FIELDS +}; + +/* uv_udp_send_t is a subclass of uv_req_t */ +struct uv_udp_send_s { + UV_REQ_FIELDS + uv_udp_t* handle; + uv_udp_send_cb cb; + UV_UDP_SEND_PRIVATE_FIELDS +}; + +/* + * Initialize a new UDP handle. The actual socket is created lazily. + * Returns 0 on success. + */ +UV_EXTERN int uv_udp_init(uv_loop_t*, uv_udp_t* handle); + +/* + * Opens an existing file descriptor or SOCKET as a udp handle. + * + * Unix only: + * The only requirement of the sock argument is that it follows the + * datagram contract (works in unconnected mode, supports sendmsg()/recvmsg(), + * etc.). In other words, other datagram-type sockets like raw sockets or + * netlink sockets can also be passed to this function. + */ +UV_EXTERN int uv_udp_open(uv_udp_t* handle, uv_os_sock_t sock); + +/* + * Bind to a IPv4 address and port. + * + * Arguments: + * handle UDP handle. Should have been initialized with `uv_udp_init`. + * addr struct sockaddr_in with the address and port to bind to. + * flags Unused. + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_bind(uv_udp_t* handle, struct sockaddr_in addr, + unsigned flags); + +/* + * Bind to a IPv6 address and port. + * + * Arguments: + * handle UDP handle. Should have been initialized with `uv_udp_init`. + * addr struct sockaddr_in with the address and port to bind to. + * flags Should be 0 or UV_UDP_IPV6ONLY. + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_bind6(uv_udp_t* handle, struct sockaddr_in6 addr, + unsigned flags); + +UV_EXTERN int uv_udp_getsockname(uv_udp_t* handle, struct sockaddr* name, + int* namelen); + +/* + * Set membership for a multicast address + * + * Arguments: + * handle UDP handle. Should have been initialized with + * `uv_udp_init`. + * multicast_addr multicast address to set membership for + * interface_addr interface address + * membership Should be UV_JOIN_GROUP or UV_LEAVE_GROUP + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_set_membership(uv_udp_t* handle, + const char* multicast_addr, const char* interface_addr, + uv_membership membership); + +/* + * Set IP multicast loop flag. Makes multicast packets loop back to + * local sockets. + * + * Arguments: + * handle UDP handle. Should have been initialized with + * `uv_udp_init`. + * on 1 for on, 0 for off + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_set_multicast_loop(uv_udp_t* handle, int on); + +/* + * Set the multicast ttl + * + * Arguments: + * handle UDP handle. Should have been initialized with + * `uv_udp_init`. + * ttl 1 through 255 + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_set_multicast_ttl(uv_udp_t* handle, int ttl); + +/* + * Set broadcast on or off + * + * Arguments: + * handle UDP handle. Should have been initialized with + * `uv_udp_init`. + * on 1 for on, 0 for off + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_set_broadcast(uv_udp_t* handle, int on); + +/* + * Set the time to live + * + * Arguments: + * handle UDP handle. Should have been initialized with + * `uv_udp_init`. + * ttl 1 through 255 + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_set_ttl(uv_udp_t* handle, int ttl); + +/* + * Send data. If the socket has not previously been bound with `uv_udp_bind` + * or `uv_udp_bind6`, it is bound to 0.0.0.0 (the "all interfaces" address) + * and a random port number. + * + * Arguments: + * req UDP request handle. Need not be initialized. + * handle UDP handle. Should have been initialized with `uv_udp_init`. + * bufs List of buffers to send. + * bufcnt Number of buffers in `bufs`. + * addr Address of the remote peer. See `uv_ip4_addr`. + * send_cb Callback to invoke when the data has been sent out. + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_send(uv_udp_send_t* req, uv_udp_t* handle, + uv_buf_t bufs[], int bufcnt, struct sockaddr_in addr, + uv_udp_send_cb send_cb); + +/* + * Send data. If the socket has not previously been bound with `uv_udp_bind6`, + * it is bound to ::0 (the "all interfaces" address) and a random port number. + * + * Arguments: + * req UDP request handle. Need not be initialized. + * handle UDP handle. Should have been initialized with `uv_udp_init`. + * bufs List of buffers to send. + * bufcnt Number of buffers in `bufs`. + * addr Address of the remote peer. See `uv_ip6_addr`. + * send_cb Callback to invoke when the data has been sent out. + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_send6(uv_udp_send_t* req, uv_udp_t* handle, + uv_buf_t bufs[], int bufcnt, struct sockaddr_in6 addr, + uv_udp_send_cb send_cb); + +/* + * Receive data. If the socket has not previously been bound with `uv_udp_bind` + * or `uv_udp_bind6`, it is bound to 0.0.0.0 (the "all interfaces" address) + * and a random port number. + * + * Arguments: + * handle UDP handle. Should have been initialized with `uv_udp_init`. + * alloc_cb Callback to invoke when temporary storage is needed. + * recv_cb Callback to invoke with received data. + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloc_cb, + uv_udp_recv_cb recv_cb); + +/* + * Stop listening for incoming datagrams. + * + * Arguments: + * handle UDP handle. Should have been initialized with `uv_udp_init`. + * + * Returns: + * 0 on success, or an error code < 0 on failure. + */ +UV_EXTERN int uv_udp_recv_stop(uv_udp_t* handle); + + +/* + * uv_tty_t is a subclass of uv_stream_t + * + * Representing a stream for the console. + */ +struct uv_tty_s { + UV_HANDLE_FIELDS + UV_STREAM_FIELDS + UV_TTY_PRIVATE_FIELDS +}; + +/* + * Initialize a new TTY stream with the given file descriptor. Usually the + * file descriptor will be + * 0 = stdin + * 1 = stdout + * 2 = stderr + * The last argument, readable, specifies if you plan on calling + * uv_read_start with this stream. stdin is readable, stdout is not. + * + * TTY streams which are not readable have blocking writes. + */ +UV_EXTERN int uv_tty_init(uv_loop_t*, uv_tty_t*, uv_file fd, int readable); + +/* + * Set mode. 0 for normal, 1 for raw. + */ +UV_EXTERN int uv_tty_set_mode(uv_tty_t*, int mode); + +/* + * To be called when the program exits. Resets TTY settings to default + * values for the next process to take over. + */ +UV_EXTERN void uv_tty_reset_mode(void); + +/* + * Gets the current Window size. On success zero is returned. + */ +UV_EXTERN int uv_tty_get_winsize(uv_tty_t*, int* width, int* height); + +/* + * Used to detect what type of stream should be used with a given file + * descriptor. Usually this will be used during initialization to guess the + * type of the stdio streams. + * For isatty() functionality use this function and test for UV_TTY. + */ +UV_EXTERN uv_handle_type uv_guess_handle(uv_file file); + +/* + * uv_pipe_t is a subclass of uv_stream_t + * + * Representing a pipe stream or pipe server. On Windows this is a Named + * Pipe. On Unix this is a UNIX domain socket. + */ +struct uv_pipe_s { + UV_HANDLE_FIELDS + UV_STREAM_FIELDS + int ipc; /* non-zero if this pipe is used for passing handles */ + UV_PIPE_PRIVATE_FIELDS +}; + +/* + * Initialize a pipe. The last argument is a boolean to indicate if + * this pipe will be used for handle passing between processes. + */ +UV_EXTERN int uv_pipe_init(uv_loop_t*, uv_pipe_t* handle, int ipc); + +/* + * Opens an existing file descriptor or HANDLE as a pipe. + */ +UV_EXTERN int uv_pipe_open(uv_pipe_t*, uv_file file); + +UV_EXTERN int uv_pipe_bind(uv_pipe_t* handle, const char* name); + +UV_EXTERN void uv_pipe_connect(uv_connect_t* req, uv_pipe_t* handle, + const char* name, uv_connect_cb cb); + +/* + * This setting applies to Windows only. + * Set the number of pending pipe instance handles when the pipe server + * is waiting for connections. + */ +UV_EXTERN void uv_pipe_pending_instances(uv_pipe_t* handle, int count); + + +/* + * uv_poll_t is a subclass of uv_handle_t. + * + * The uv_poll watcher is used to watch file descriptors for readability and + * writability, similar to the purpose of poll(2). + * + * The purpose of uv_poll is to enable integrating external libraries that + * rely on the event loop to signal it about the socket status changes, like + * c-ares or libssh2. Using uv_poll_t for any other other purpose is not + * recommended; uv_tcp_t, uv_udp_t, etc. provide an implementation that is + * much faster and more scalable than what can be achieved with uv_poll_t, + * especially on Windows. + * + * It is possible that uv_poll occasionally signals that a file descriptor is + * readable or writable even when it isn't. The user should therefore always + * be prepared to handle EAGAIN or equivalent when it attempts to read from or + * write to the fd. + * + * It is not okay to have multiple active uv_poll watchers for the same socket. + * This can cause libuv to busyloop or otherwise malfunction. + * + * The user should not close a file descriptor while it is being polled by an + * active uv_poll watcher. This can cause the poll watcher to report an error, + * but it might also start polling another socket. However the fd can be safely + * closed immediately after a call to uv_poll_stop() or uv_close(). + * + * On windows only sockets can be polled with uv_poll. On unix any file + * descriptor that would be accepted by poll(2) can be used with uv_poll. + */ +struct uv_poll_s { + UV_HANDLE_FIELDS + uv_poll_cb poll_cb; + UV_POLL_PRIVATE_FIELDS +}; + +enum uv_poll_event { + UV_READABLE = 1, + UV_WRITABLE = 2 +}; + +/* Initialize the poll watcher using a file descriptor. */ +UV_EXTERN int uv_poll_init(uv_loop_t* loop, uv_poll_t* handle, int fd); + +/* Initialize the poll watcher using a socket descriptor. On unix this is */ +/* identical to uv_poll_init. On windows it takes a SOCKET handle. */ +UV_EXTERN int uv_poll_init_socket(uv_loop_t* loop, uv_poll_t* handle, + uv_os_sock_t socket); + +/* + * Starts polling the file descriptor. `events` is a bitmask consisting made up + * of UV_READABLE and UV_WRITABLE. As soon as an event is detected the callback + * will be called with `status` set to 0, and the detected events set en the + * `events` field. + * + * If an error happens while polling status, `status` < 0 and corresponds + * with one of the UV_E* error codes. The user should not close the socket + * while uv_poll is active. If the user does that anyway, the callback *may* + * be called reporting an error status, but this is not guaranteed. + * + * Calling uv_poll_start on an uv_poll watcher that is already active is fine. + * Doing so will update the events mask that is being watched for. + */ +UV_EXTERN int uv_poll_start(uv_poll_t* handle, int events, uv_poll_cb cb); + +/* Stops polling the file descriptor. */ +UV_EXTERN int uv_poll_stop(uv_poll_t* handle); + + +/* + * uv_prepare_t is a subclass of uv_handle_t. + * + * Every active prepare handle gets its callback called exactly once per loop + * iteration, just before the system blocks to wait for completed i/o. + */ +struct uv_prepare_s { + UV_HANDLE_FIELDS + UV_PREPARE_PRIVATE_FIELDS +}; + +UV_EXTERN int uv_prepare_init(uv_loop_t*, uv_prepare_t* prepare); + +UV_EXTERN int uv_prepare_start(uv_prepare_t* prepare, uv_prepare_cb cb); + +UV_EXTERN int uv_prepare_stop(uv_prepare_t* prepare); + + +/* + * uv_check_t is a subclass of uv_handle_t. + * + * Every active check handle gets its callback called exactly once per loop + * iteration, just after the system returns from blocking. + */ +struct uv_check_s { + UV_HANDLE_FIELDS + UV_CHECK_PRIVATE_FIELDS +}; + +UV_EXTERN int uv_check_init(uv_loop_t*, uv_check_t* check); + +UV_EXTERN int uv_check_start(uv_check_t* check, uv_check_cb cb); + +UV_EXTERN int uv_check_stop(uv_check_t* check); + + +/* + * uv_idle_t is a subclass of uv_handle_t. + * + * Every active idle handle gets its callback called repeatedly until it is + * stopped. This happens after all other types of callbacks are processed. + * When there are multiple "idle" handles active, their callbacks are called + * in turn. + */ +struct uv_idle_s { + UV_HANDLE_FIELDS + UV_IDLE_PRIVATE_FIELDS +}; + +UV_EXTERN int uv_idle_init(uv_loop_t*, uv_idle_t* idle); + +UV_EXTERN int uv_idle_start(uv_idle_t* idle, uv_idle_cb cb); + +UV_EXTERN int uv_idle_stop(uv_idle_t* idle); + + +/* + * uv_async_t is a subclass of uv_handle_t. + * + * uv_async_send wakes up the event loop and calls the async handle's callback. + * There is no guarantee that every uv_async_send call leads to exactly one + * invocation of the callback; the only guarantee is that the callback function + * is called at least once after the call to async_send. Unlike all other + * libuv functions, uv_async_send can be called from another thread. + */ +struct uv_async_s { + UV_HANDLE_FIELDS + UV_ASYNC_PRIVATE_FIELDS +}; + +/* + * Initialize the uv_async_t handle. A NULL callback is allowed. + * + * Note that uv_async_init(), unlike other libuv functions, immediately + * starts the handle. To stop the handle again, close it with uv_close(). + */ +UV_EXTERN int uv_async_init(uv_loop_t*, uv_async_t* async, + uv_async_cb async_cb); + +/* + * This can be called from other threads to wake up a libuv thread. + * + * libuv is single threaded at the moment. + */ +UV_EXTERN int uv_async_send(uv_async_t* async); + + +/* + * uv_timer_t is a subclass of uv_handle_t. + * + * Used to get woken up at a specified time in the future. + */ +struct uv_timer_s { + UV_HANDLE_FIELDS + UV_TIMER_PRIVATE_FIELDS +}; + +UV_EXTERN int uv_timer_init(uv_loop_t*, uv_timer_t* handle); + +/* + * Start the timer. `timeout` and `repeat` are in milliseconds. + * + * If timeout is zero, the callback fires on the next tick of the event loop. + * + * If repeat is non-zero, the callback fires first after timeout milliseconds + * and then repeatedly after repeat milliseconds. + */ +UV_EXTERN int uv_timer_start(uv_timer_t* handle, + uv_timer_cb cb, + uint64_t timeout, + uint64_t repeat); + +UV_EXTERN int uv_timer_stop(uv_timer_t* handle); + +/* + * Stop the timer, and if it is repeating restart it using the repeat value + * as the timeout. If the timer has never been started before it returns + * UV_EINVAL. + */ +UV_EXTERN int uv_timer_again(uv_timer_t* handle); + +/* + * Set the repeat value in milliseconds. Note that if the repeat value is set + * from a timer callback it does not immediately take effect. If the timer was + * non-repeating before, it will have been stopped. If it was repeating, then + * the old repeat value will have been used to schedule the next timeout. + */ +UV_EXTERN void uv_timer_set_repeat(uv_timer_t* handle, uint64_t repeat); + +UV_EXTERN uint64_t uv_timer_get_repeat(const uv_timer_t* handle); + + +/* + * uv_getaddrinfo_t is a subclass of uv_req_t + * + * Request object for uv_getaddrinfo. + */ +struct uv_getaddrinfo_s { + UV_REQ_FIELDS + /* read-only */ + uv_loop_t* loop; + UV_GETADDRINFO_PRIVATE_FIELDS +}; + + +/* + * Asynchronous getaddrinfo(3). + * + * Either node or service may be NULL but not both. + * + * hints is a pointer to a struct addrinfo with additional address type + * constraints, or NULL. Consult `man -s 3 getaddrinfo` for details. + * + * Returns 0 on success or an error code < 0 on failure. + * + * If successful, your callback gets called sometime in the future with the + * lookup result, which is either: + * + * a) err == 0, the res argument points to a valid struct addrinfo, or + * b) err < 0, the res argument is NULL. See the UV_EAI_* constants. + * + * Call uv_freeaddrinfo() to free the addrinfo structure. + */ +UV_EXTERN int uv_getaddrinfo(uv_loop_t* loop, + uv_getaddrinfo_t* req, + uv_getaddrinfo_cb getaddrinfo_cb, + const char* node, + const char* service, + const struct addrinfo* hints); + +/* + * Free the struct addrinfo. Passing NULL is allowed and is a no-op. + */ +UV_EXTERN void uv_freeaddrinfo(struct addrinfo* ai); + + +/* uv_spawn() options */ +typedef enum { + UV_IGNORE = 0x00, + UV_CREATE_PIPE = 0x01, + UV_INHERIT_FD = 0x02, + UV_INHERIT_STREAM = 0x04, + + /* When UV_CREATE_PIPE is specified, UV_READABLE_PIPE and UV_WRITABLE_PIPE + * determine the direction of flow, from the child process' perspective. Both + * flags may be specified to create a duplex data stream. + */ + UV_READABLE_PIPE = 0x10, + UV_WRITABLE_PIPE = 0x20 +} uv_stdio_flags; + +typedef struct uv_stdio_container_s { + uv_stdio_flags flags; + + union { + uv_stream_t* stream; + int fd; + } data; +} uv_stdio_container_t; + +typedef struct uv_process_options_s { + uv_exit_cb exit_cb; /* Called after the process exits. */ + const char* file; /* Path to program to execute. */ + /* + * Command line arguments. args[0] should be the path to the program. On + * Windows this uses CreateProcess which concatenates the arguments into a + * string this can cause some strange errors. See the note at + * windows_verbatim_arguments. + */ + char** args; + /* + * This will be set as the environ variable in the subprocess. If this is + * NULL then the parents environ will be used. + */ + char** env; + /* + * If non-null this represents a directory the subprocess should execute + * in. Stands for current working directory. + */ + char* cwd; + /* + * Various flags that control how uv_spawn() behaves. See the definition of + * `enum uv_process_flags` below. + */ + unsigned int flags; + /* + * The `stdio` field points to an array of uv_stdio_container_t structs that + * describe the file descriptors that will be made available to the child + * process. The convention is that stdio[0] points to stdin, fd 1 is used for + * stdout, and fd 2 is stderr. + * + * Note that on windows file descriptors greater than 2 are available to the + * child process only if the child processes uses the MSVCRT runtime. + */ + int stdio_count; + uv_stdio_container_t* stdio; + /* + * Libuv can change the child process' user/group id. This happens only when + * the appropriate bits are set in the flags fields. This is not supported on + * windows; uv_spawn() will fail and set the error to UV_ENOTSUP. + */ + uv_uid_t uid; + uv_gid_t gid; +} uv_process_options_t; + +/* + * These are the flags that can be used for the uv_process_options.flags field. + */ +enum uv_process_flags { + /* + * Set the child process' user id. The user id is supplied in the `uid` field + * of the options struct. This does not work on windows; setting this flag + * will cause uv_spawn() to fail. + */ + UV_PROCESS_SETUID = (1 << 0), + /* + * Set the child process' group id. The user id is supplied in the `gid` + * field of the options struct. This does not work on windows; setting this + * flag will cause uv_spawn() to fail. + */ + UV_PROCESS_SETGID = (1 << 1), + /* + * Do not wrap any arguments in quotes, or perform any other escaping, when + * converting the argument list into a command line string. This option is + * only meaningful on Windows systems. On unix it is silently ignored. + */ + UV_PROCESS_WINDOWS_VERBATIM_ARGUMENTS = (1 << 2), + /* + * Spawn the child process in a detached state - this will make it a process + * group leader, and will effectively enable the child to keep running after + * the parent exits. Note that the child process will still keep the + * parent's event loop alive unless the parent process calls uv_unref() on + * the child's process handle. + */ + UV_PROCESS_DETACHED = (1 << 3), + /* + * Hide the subprocess console window that would normally be created. This + * option is only meaningful on Windows systems. On unix it is silently + * ignored. + */ + UV_PROCESS_WINDOWS_HIDE = (1 << 4) +}; + +/* + * uv_process_t is a subclass of uv_handle_t + */ +struct uv_process_s { + UV_HANDLE_FIELDS + uv_exit_cb exit_cb; + int pid; + UV_PROCESS_PRIVATE_FIELDS +}; + +/* Initializes uv_process_t and starts the process. */ +UV_EXTERN int uv_spawn(uv_loop_t*, uv_process_t*, + uv_process_options_t options); + + +/* + * Kills the process with the specified signal. The user must still + * call uv_close on the process. + */ +UV_EXTERN int uv_process_kill(uv_process_t*, int signum); + + +/* Kills the process with the specified signal. */ +UV_EXTERN int uv_kill(int pid, int signum); + + +/* + * uv_work_t is a subclass of uv_req_t + */ +struct uv_work_s { + UV_REQ_FIELDS + uv_loop_t* loop; + uv_work_cb work_cb; + uv_after_work_cb after_work_cb; + UV_WORK_PRIVATE_FIELDS +}; + +/* Queues a work request to execute asynchronously on the thread pool. */ +UV_EXTERN int uv_queue_work(uv_loop_t* loop, uv_work_t* req, + uv_work_cb work_cb, uv_after_work_cb after_work_cb); + +/* Cancel a pending request. Fails if the request is executing or has finished + * executing. + * + * Returns 0 on success, or an error code < 0 on failure. + * + * Only cancellation of uv_fs_t, uv_getaddrinfo_t and uv_work_t requests is + * currently supported. + * + * Cancelled requests have their callbacks invoked some time in the future. + * It's _not_ safe to free the memory associated with the request until your + * callback is called. + * + * Here is how cancellation is reported to your callback: + * + * - A uv_fs_t request has its req->result field set to UV_ECANCELED. + * + * - A uv_work_t or uv_getaddrinfo_t request has its callback invoked with + * status == UV_ECANCELED. + * + * This function is currently only implemented on UNIX platforms. On Windows, + * it always returns UV_ENOSYS. + */ +UV_EXTERN int uv_cancel(uv_req_t* req); + + +struct uv_cpu_info_s { + char* model; + int speed; + struct uv_cpu_times_s { + uint64_t user; + uint64_t nice; + uint64_t sys; + uint64_t idle; + uint64_t irq; + } cpu_times; +}; + +struct uv_interface_address_s { + char* name; + char phys_addr[6]; + int is_internal; + union { + struct sockaddr_in address4; + struct sockaddr_in6 address6; + } address; + union { + struct sockaddr_in netmask4; + struct sockaddr_in6 netmask6; + } netmask; +}; + +UV_EXTERN char** uv_setup_args(int argc, char** argv); +UV_EXTERN int uv_get_process_title(char* buffer, size_t size); +UV_EXTERN int uv_set_process_title(const char* title); +UV_EXTERN int uv_resident_set_memory(size_t* rss); +UV_EXTERN int uv_uptime(double* uptime); + +/* + * This allocates cpu_infos array, and sets count. The array + * is freed using uv_free_cpu_info(). + */ +UV_EXTERN int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count); +UV_EXTERN void uv_free_cpu_info(uv_cpu_info_t* cpu_infos, int count); + +/* + * This allocates addresses array, and sets count. The array + * is freed using uv_free_interface_addresses(). + */ +UV_EXTERN int uv_interface_addresses(uv_interface_address_t** addresses, + int* count); +UV_EXTERN void uv_free_interface_addresses(uv_interface_address_t* addresses, + int count); + +/* + * File System Methods. + * + * The uv_fs_* functions execute a blocking system call asynchronously (in a + * thread pool) and call the specified callback in the specified loop after + * completion. If the user gives NULL as the callback the blocking system + * call will be called synchronously. req should be a pointer to an + * uninitialized uv_fs_t object. + * + * uv_fs_req_cleanup() must be called after completion of the uv_fs_ + * function to free any internal memory allocations associated with the + * request. + */ + +typedef enum { + UV_FS_UNKNOWN = -1, + UV_FS_CUSTOM, + UV_FS_OPEN, + UV_FS_CLOSE, + UV_FS_READ, + UV_FS_WRITE, + UV_FS_SENDFILE, + UV_FS_STAT, + UV_FS_LSTAT, + UV_FS_FSTAT, + UV_FS_FTRUNCATE, + UV_FS_UTIME, + UV_FS_FUTIME, + UV_FS_CHMOD, + UV_FS_FCHMOD, + UV_FS_FSYNC, + UV_FS_FDATASYNC, + UV_FS_UNLINK, + UV_FS_RMDIR, + UV_FS_MKDIR, + UV_FS_RENAME, + UV_FS_READDIR, + UV_FS_LINK, + UV_FS_SYMLINK, + UV_FS_READLINK, + UV_FS_CHOWN, + UV_FS_FCHOWN +} uv_fs_type; + +/* uv_fs_t is a subclass of uv_req_t */ +struct uv_fs_s { + UV_REQ_FIELDS + uv_fs_type fs_type; + uv_loop_t* loop; + uv_fs_cb cb; + ssize_t result; + void* ptr; + const char* path; + uv_stat_t statbuf; /* Stores the result of uv_fs_stat and uv_fs_fstat. */ + UV_FS_PRIVATE_FIELDS +}; + +UV_EXTERN void uv_fs_req_cleanup(uv_fs_t* req); + +UV_EXTERN int uv_fs_close(uv_loop_t* loop, uv_fs_t* req, uv_file file, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_open(uv_loop_t* loop, uv_fs_t* req, const char* path, + int flags, int mode, uv_fs_cb cb); + +UV_EXTERN int uv_fs_read(uv_loop_t* loop, uv_fs_t* req, uv_file file, + void* buf, size_t length, int64_t offset, uv_fs_cb cb); + +UV_EXTERN int uv_fs_unlink(uv_loop_t* loop, uv_fs_t* req, const char* path, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_write(uv_loop_t* loop, uv_fs_t* req, uv_file file, + const void* buf, size_t length, int64_t offset, uv_fs_cb cb); + +UV_EXTERN int uv_fs_mkdir(uv_loop_t* loop, uv_fs_t* req, const char* path, + int mode, uv_fs_cb cb); + +UV_EXTERN int uv_fs_rmdir(uv_loop_t* loop, uv_fs_t* req, const char* path, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_readdir(uv_loop_t* loop, uv_fs_t* req, + const char* path, int flags, uv_fs_cb cb); + +UV_EXTERN int uv_fs_stat(uv_loop_t* loop, uv_fs_t* req, const char* path, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_fstat(uv_loop_t* loop, uv_fs_t* req, uv_file file, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_rename(uv_loop_t* loop, uv_fs_t* req, const char* path, + const char* new_path, uv_fs_cb cb); + +UV_EXTERN int uv_fs_fsync(uv_loop_t* loop, uv_fs_t* req, uv_file file, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_ftruncate(uv_loop_t* loop, uv_fs_t* req, uv_file file, + int64_t offset, uv_fs_cb cb); + +UV_EXTERN int uv_fs_sendfile(uv_loop_t* loop, uv_fs_t* req, uv_file out_fd, + uv_file in_fd, int64_t in_offset, size_t length, uv_fs_cb cb); + +UV_EXTERN int uv_fs_chmod(uv_loop_t* loop, uv_fs_t* req, const char* path, + int mode, uv_fs_cb cb); + +UV_EXTERN int uv_fs_utime(uv_loop_t* loop, uv_fs_t* req, const char* path, + double atime, double mtime, uv_fs_cb cb); + +UV_EXTERN int uv_fs_futime(uv_loop_t* loop, uv_fs_t* req, uv_file file, + double atime, double mtime, uv_fs_cb cb); + +UV_EXTERN int uv_fs_lstat(uv_loop_t* loop, uv_fs_t* req, const char* path, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_link(uv_loop_t* loop, uv_fs_t* req, const char* path, + const char* new_path, uv_fs_cb cb); + +/* + * This flag can be used with uv_fs_symlink on Windows + * to specify whether path argument points to a directory. + */ +#define UV_FS_SYMLINK_DIR 0x0001 + +/* + * This flag can be used with uv_fs_symlink on Windows + * to specify whether the symlink is to be created using junction points. + */ +#define UV_FS_SYMLINK_JUNCTION 0x0002 + +UV_EXTERN int uv_fs_symlink(uv_loop_t* loop, uv_fs_t* req, const char* path, + const char* new_path, int flags, uv_fs_cb cb); + +UV_EXTERN int uv_fs_readlink(uv_loop_t* loop, uv_fs_t* req, const char* path, + uv_fs_cb cb); + +UV_EXTERN int uv_fs_fchmod(uv_loop_t* loop, uv_fs_t* req, uv_file file, + int mode, uv_fs_cb cb); + +UV_EXTERN int uv_fs_chown(uv_loop_t* loop, uv_fs_t* req, const char* path, + uv_uid_t uid, uv_gid_t gid, uv_fs_cb cb); + +UV_EXTERN int uv_fs_fchown(uv_loop_t* loop, uv_fs_t* req, uv_file file, + uv_uid_t uid, uv_gid_t gid, uv_fs_cb cb); + + +enum uv_fs_event { + UV_RENAME = 1, + UV_CHANGE = 2 +}; + + +struct uv_fs_event_s { + UV_HANDLE_FIELDS + char* filename; + UV_FS_EVENT_PRIVATE_FIELDS +}; + + +/* + * uv_fs_stat() based polling file watcher. + */ +struct uv_fs_poll_s { + UV_HANDLE_FIELDS + /* Private, don't touch. */ + void* poll_ctx; +}; + +UV_EXTERN int uv_fs_poll_init(uv_loop_t* loop, uv_fs_poll_t* handle); + +/* + * Check the file at `path` for changes every `interval` milliseconds. + * + * Your callback is invoked with `status < 0` if `path` does not exist + * or is inaccessible. The watcher is *not* stopped but your callback is + * not called again until something changes (e.g. when the file is created + * or the error reason changes). + * + * When `status == 0`, your callback receives pointers to the old and new + * `uv_stat_t` structs. They are valid for the duration of the callback + * only! + * + * For maximum portability, use multi-second intervals. Sub-second intervals + * will not detect all changes on many file systems. + */ +UV_EXTERN int uv_fs_poll_start(uv_fs_poll_t* handle, + uv_fs_poll_cb poll_cb, + const char* path, + unsigned int interval); + +UV_EXTERN int uv_fs_poll_stop(uv_fs_poll_t* handle); + + +/* + * UNIX signal handling on a per-event loop basis. The implementation is not + * ultra efficient so don't go creating a million event loops with a million + * signal watchers. + * + * Note to Linux users: SIGRT0 and SIGRT1 (signals 32 and 33) are used by the + * NPTL pthreads library to manage threads. Installing watchers for those + * signals will lead to unpredictable behavior and is strongly discouraged. + * Future versions of libuv may simply reject them. + * + * Some signal support is available on Windows: + * + * SIGINT is normally delivered when the user presses CTRL+C. However, like + * on Unix, it is not generated when terminal raw mode is enabled. + * + * SIGBREAK is delivered when the user pressed CTRL+BREAK. + * + * SIGHUP is generated when the user closes the console window. On SIGHUP the + * program is given approximately 10 seconds to perform cleanup. After that + * Windows will unconditionally terminate it. + * + * SIGWINCH is raised whenever libuv detects that the console has been + * resized. SIGWINCH is emulated by libuv when the program uses an uv_tty_t + * handle to write to the console. SIGWINCH may not always be delivered in a + * timely manner; libuv will only detect size changes when the cursor is + * being moved. When a readable uv_tty_handle is used in raw mode, resizing + * the console buffer will also trigger a SIGWINCH signal. + * + * Watchers for other signals can be successfully created, but these signals + * are never generated. These signals are: SIGILL, SIGABRT, SIGFPE, SIGSEGV, + * SIGTERM and SIGKILL. + * + * Note that calls to raise() or abort() to programmatically raise a signal are + * not detected by libuv; these will not trigger a signal watcher. + */ +struct uv_signal_s { + UV_HANDLE_FIELDS + uv_signal_cb signal_cb; + int signum; + UV_SIGNAL_PRIVATE_FIELDS +}; + +UV_EXTERN int uv_signal_init(uv_loop_t* loop, uv_signal_t* handle); + +UV_EXTERN int uv_signal_start(uv_signal_t* handle, + uv_signal_cb signal_cb, + int signum); + +UV_EXTERN int uv_signal_stop(uv_signal_t* handle); + + +/* + * Gets load average. + * See: http://en.wikipedia.org/wiki/Load_(computing) + * Returns [0,0,0] on Windows. + */ +UV_EXTERN void uv_loadavg(double avg[3]); + + +/* + * Flags to be passed to uv_fs_event_init. + */ +enum uv_fs_event_flags { + /* + * By default, if the fs event watcher is given a directory name, we will + * watch for all events in that directory. This flags overrides this behavior + * and makes fs_event report only changes to the directory entry itself. This + * flag does not affect individual files watched. + * This flag is currently not implemented yet on any backend. + */ + UV_FS_EVENT_WATCH_ENTRY = 1, + + /* + * By default uv_fs_event will try to use a kernel interface such as inotify + * or kqueue to detect events. This may not work on remote filesystems such + * as NFS mounts. This flag makes fs_event fall back to calling stat() on a + * regular interval. + * This flag is currently not implemented yet on any backend. + */ + UV_FS_EVENT_STAT = 2, + + /* + * By default, event watcher, when watching directory, is not registering + * (is ignoring) changes in it's subdirectories. + * This flag will override this behaviour on platforms that support it. + */ + UV_FS_EVENT_RECURSIVE = 3 +}; + + +UV_EXTERN int uv_fs_event_init(uv_loop_t* loop, uv_fs_event_t* handle, + const char* filename, uv_fs_event_cb cb, int flags); + +/* Utility */ + +/* Convert string ip addresses to binary structures */ +UV_EXTERN struct sockaddr_in uv_ip4_addr(const char* ip, int port); +UV_EXTERN struct sockaddr_in6 uv_ip6_addr(const char* ip, int port); + +/* Convert binary addresses to strings */ +UV_EXTERN int uv_ip4_name(struct sockaddr_in* src, char* dst, size_t size); +UV_EXTERN int uv_ip6_name(struct sockaddr_in6* src, char* dst, size_t size); + +/* Cross-platform IPv6-capable implementation of the 'standard' inet_ntop */ +/* and inet_pton functions. On success they return 0. If an error */ +/* the target of the `dst` pointer is unmodified. */ +UV_EXTERN int uv_inet_ntop(int af, const void* src, char* dst, size_t size); +UV_EXTERN int uv_inet_pton(int af, const char* src, void* dst); + +/* Gets the executable path */ +UV_EXTERN int uv_exepath(char* buffer, size_t* size); + +/* Gets the current working directory */ +UV_EXTERN int uv_cwd(char* buffer, size_t size); + +/* Changes the current working directory */ +UV_EXTERN int uv_chdir(const char* dir); + +/* Gets memory info in bytes */ +UV_EXTERN uint64_t uv_get_free_memory(void); +UV_EXTERN uint64_t uv_get_total_memory(void); + +/* + * Returns the current high-resolution real time. This is expressed in + * nanoseconds. It is relative to an arbitrary time in the past. It is not + * related to the time of day and therefore not subject to clock drift. The + * primary use is for measuring performance between intervals. + * + * Note not every platform can support nanosecond resolution; however, this + * value will always be in nanoseconds. + */ +UV_EXTERN extern uint64_t uv_hrtime(void); + + +/* + * Disables inheritance for file descriptors / handles that this process + * inherited from its parent. The effect is that child processes spawned by + * this process don't accidentally inherit these handles. + * + * It is recommended to call this function as early in your program as possible, + * before the inherited file descriptors can be closed or duplicated. + * + * Note that this function works on a best-effort basis: there is no guarantee + * that libuv can discover all file descriptors that were inherited. In general + * it does a better job on Windows than it does on unix. + */ +UV_EXTERN void uv_disable_stdio_inheritance(void); + +/* + * Opens a shared library. The filename is in utf-8. Returns 0 on success and + * -1 on error. Call `uv_dlerror(uv_lib_t*)` to get the error message. + */ +UV_EXTERN int uv_dlopen(const char* filename, uv_lib_t* lib); + +/* + * Close the shared library. + */ +UV_EXTERN void uv_dlclose(uv_lib_t* lib); + +/* + * Retrieves a data pointer from a dynamic library. It is legal for a symbol to + * map to NULL. Returns 0 on success and -1 if the symbol was not found. + */ +UV_EXTERN int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr); + +/* + * Returns the last uv_dlopen() or uv_dlsym() error message. + */ +UV_EXTERN const char* uv_dlerror(uv_lib_t* lib); + +/* + * The mutex functions return 0 on success or an error code < 0 + * (unless the return type is void, of course). + */ +UV_EXTERN int uv_mutex_init(uv_mutex_t* handle); +UV_EXTERN void uv_mutex_destroy(uv_mutex_t* handle); +UV_EXTERN void uv_mutex_lock(uv_mutex_t* handle); +UV_EXTERN int uv_mutex_trylock(uv_mutex_t* handle); +UV_EXTERN void uv_mutex_unlock(uv_mutex_t* handle); + +/* + * Same goes for the read/write lock functions. + */ +UV_EXTERN int uv_rwlock_init(uv_rwlock_t* rwlock); +UV_EXTERN void uv_rwlock_destroy(uv_rwlock_t* rwlock); +UV_EXTERN void uv_rwlock_rdlock(uv_rwlock_t* rwlock); +UV_EXTERN int uv_rwlock_tryrdlock(uv_rwlock_t* rwlock); +UV_EXTERN void uv_rwlock_rdunlock(uv_rwlock_t* rwlock); +UV_EXTERN void uv_rwlock_wrlock(uv_rwlock_t* rwlock); +UV_EXTERN int uv_rwlock_trywrlock(uv_rwlock_t* rwlock); +UV_EXTERN void uv_rwlock_wrunlock(uv_rwlock_t* rwlock); + +/* + * Same goes for the semaphore functions. + */ +UV_EXTERN int uv_sem_init(uv_sem_t* sem, unsigned int value); +UV_EXTERN void uv_sem_destroy(uv_sem_t* sem); +UV_EXTERN void uv_sem_post(uv_sem_t* sem); +UV_EXTERN void uv_sem_wait(uv_sem_t* sem); +UV_EXTERN int uv_sem_trywait(uv_sem_t* sem); + +/* + * Same goes for the condition variable functions. + */ +UV_EXTERN int uv_cond_init(uv_cond_t* cond); +UV_EXTERN void uv_cond_destroy(uv_cond_t* cond); +UV_EXTERN void uv_cond_signal(uv_cond_t* cond); +UV_EXTERN void uv_cond_broadcast(uv_cond_t* cond); +/* Waits on a condition variable without a timeout. + * + * Note: + * 1. callers should be prepared to deal with spurious wakeups. + */ +UV_EXTERN void uv_cond_wait(uv_cond_t* cond, uv_mutex_t* mutex); +/* Waits on a condition variable with a timeout in nano seconds. + * Returns 0 for success or UV_ETIMEDOUT on timeout, It aborts when other + * errors happen. + * + * Note: + * 1. callers should be prepared to deal with spurious wakeups. + * 2. the granularity of timeout on Windows is never less than one millisecond. + * 3. uv_cond_timedwait takes a relative timeout, not an absolute time. + */ +UV_EXTERN int uv_cond_timedwait(uv_cond_t* cond, uv_mutex_t* mutex, + uint64_t timeout); + +UV_EXTERN int uv_barrier_init(uv_barrier_t* barrier, unsigned int count); +UV_EXTERN void uv_barrier_destroy(uv_barrier_t* barrier); +UV_EXTERN void uv_barrier_wait(uv_barrier_t* barrier); + +/* Runs a function once and only once. Concurrent calls to uv_once() with the + * same guard will block all callers except one (it's unspecified which one). + * The guard should be initialized statically with the UV_ONCE_INIT macro. + */ +UV_EXTERN void uv_once(uv_once_t* guard, void (*callback)(void)); + +UV_EXTERN int uv_thread_create(uv_thread_t *tid, + void (*entry)(void *arg), void *arg); +UV_EXTERN unsigned long uv_thread_self(void); +UV_EXTERN int uv_thread_join(uv_thread_t *tid); + +/* The presence of these unions force similar struct layout. */ +#define XX(_, name) uv_ ## name ## _t name; +union uv_any_handle { + UV_HANDLE_TYPE_MAP(XX) +}; + +union uv_any_req { + UV_REQ_TYPE_MAP(XX) +}; +#undef XX + + +struct uv_loop_s { + /* User data - use this for whatever. */ + void* data; + /* Loop reference counting */ + unsigned int active_handles; + void* handle_queue[2]; + void* active_reqs[2]; + /* Internal flag to signal loop stop */ + unsigned int stop_flag; + UV_LOOP_PRIVATE_FIELDS +}; + + +/* Don't export the private CPP symbols. */ +#undef UV_HANDLE_TYPE_PRIVATE +#undef UV_REQ_TYPE_PRIVATE +#undef UV_REQ_PRIVATE_FIELDS +#undef UV_STREAM_PRIVATE_FIELDS +#undef UV_TCP_PRIVATE_FIELDS +#undef UV_PREPARE_PRIVATE_FIELDS +#undef UV_CHECK_PRIVATE_FIELDS +#undef UV_IDLE_PRIVATE_FIELDS +#undef UV_ASYNC_PRIVATE_FIELDS +#undef UV_TIMER_PRIVATE_FIELDS +#undef UV_GETADDRINFO_PRIVATE_FIELDS +#undef UV_FS_REQ_PRIVATE_FIELDS +#undef UV_WORK_PRIVATE_FIELDS +#undef UV_FS_EVENT_PRIVATE_FIELDS +#undef UV_SIGNAL_PRIVATE_FIELDS +#undef UV_LOOP_PRIVATE_FIELDS +#undef UV_LOOP_PRIVATE_PLATFORM_FIELDS + +#ifdef __cplusplus +} +#endif +#endif /* UV_H */