/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_H_INCLUDED_ #define _NGX_EVENT_H_INCLUDED_ #include #include #define NGX_INVALID_INDEX 0xd0d0d0d0 #if (NGX_HAVE_IOCP) typedef struct { WSAOVERLAPPED ovlp; ngx_event_t *event; int error; } ngx_event_ovlp_t; #endif typedef struct { ngx_uint_t lock; ngx_event_t *events; ngx_event_t *last; } ngx_event_mutex_t; struct ngx_event_s { void *data; unsigned write:1; unsigned accept:1; /* used to detect the stale events in kqueue, rtsig, and epoll */ unsigned instance:1; /* * the event was passed or would be passed to a kernel; * in aio mode - operation was posted. */ unsigned active:1; unsigned disabled:1; /* the ready event; in aio mode 0 means that no operation can be posted */ unsigned ready:1; unsigned oneshot:1; /* aio operation is complete */ unsigned complete:1; unsigned eof:1; unsigned error:1; unsigned timedout:1; unsigned timer_set:1; unsigned delayed:1; unsigned deferred_accept:1; /* the pending eof reported by kqueue, epoll or in aio chain operation */ unsigned pending_eof:1; #if !(NGX_THREADS) unsigned posted_ready:1; #endif #if (NGX_WIN32) /* setsockopt(SO_UPDATE_ACCEPT_CONTEXT) was successful */ unsigned accept_context_updated:1; #endif #if (NGX_HAVE_KQUEUE) unsigned kq_vnode:1; /* the pending errno reported by kqueue */ int kq_errno; #endif /* * kqueue only: * accept: number of sockets that wait to be accepted * read: bytes to read when event is ready * or lowat when event is set with NGX_LOWAT_EVENT flag * write: available space in buffer when event is ready * or lowat when event is set with NGX_LOWAT_EVENT flag * * iocp: TODO * * otherwise: * accept: 1 if accept many, 0 otherwise */ #if (NGX_HAVE_KQUEUE) || (NGX_HAVE_IOCP) int available; #else unsigned available:1; #endif ngx_event_handler_pt handler; #if (NGX_HAVE_AIO) #if (NGX_HAVE_IOCP) ngx_event_ovlp_t ovlp; #else struct aiocb aiocb; #endif #endif ngx_uint_t index; ngx_log_t *log; ngx_rbtree_node_t timer; unsigned closed:1; /* to test on worker exit */ unsigned channel:1; unsigned resolver:1; #if (NGX_THREADS) unsigned locked:1; unsigned posted_ready:1; unsigned posted_timedout:1; unsigned posted_eof:1; #if (NGX_HAVE_KQUEUE) /* the pending errno reported by kqueue */ int posted_errno; #endif #if (NGX_HAVE_KQUEUE) || (NGX_HAVE_IOCP) int posted_available; #else unsigned posted_available:1; #endif ngx_atomic_t *lock; ngx_atomic_t *own_lock; #endif /* the links of the posted queue */ ngx_event_t *next; ngx_event_t **prev; #if 0 /* the threads support */ /* * the event thread context, we store it here * if $(CC) does not understand __thread declaration * and pthread_getspecific() is too costly */ void *thr_ctx; #if (NGX_EVENT_T_PADDING) /* event should not cross cache line in SMP */ uint32_t padding[NGX_EVENT_T_PADDING]; #endif #endif }; #if (NGX_HAVE_FILE_AIO) struct ngx_event_aio_s { void *data; ngx_event_handler_pt handler; ngx_file_t *file; ngx_fd_t fd; #if (NGX_HAVE_EVENTFD) int64_t res; #if (NGX_TEST_BUILD_EPOLL) ngx_err_t err; size_t nbytes; #endif #else ngx_err_t err; size_t nbytes; #endif #if (NGX_HAVE_AIO_SENDFILE) off_t last_offset; #endif ngx_aiocb_t aiocb; ngx_event_t event; }; #endif typedef struct { ngx_int_t (*add)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags); ngx_int_t (*del)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags); ngx_int_t (*enable)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags); ngx_int_t (*disable)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags); ngx_int_t (*add_conn)(ngx_connection_t *c); ngx_int_t (*del_conn)(ngx_connection_t *c, ngx_uint_t flags); ngx_int_t (*process_changes)(ngx_cycle_t *cycle, ngx_uint_t nowait); ngx_int_t (*process_events)(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags); ngx_int_t (*init)(ngx_cycle_t *cycle, ngx_msec_t timer); void (*done)(ngx_cycle_t *cycle); } ngx_event_actions_t; extern ngx_event_actions_t ngx_event_actions; /* * The event filter requires to read/write the whole data: * select, poll, /dev/poll, kqueue, epoll. */ #define NGX_USE_LEVEL_EVENT 0x00000001 /* * The event filter is deleted after a notification without an additional * syscall: kqueue, epoll. */ #define NGX_USE_ONESHOT_EVENT 0x00000002 /* * The event filter notifies only the changes and an initial level: * kqueue, epoll. */ #define NGX_USE_CLEAR_EVENT 0x00000004 /* * The event filter has kqueue features: the eof flag, errno, * available data, etc. */ #define NGX_USE_KQUEUE_EVENT 0x00000008 /* * The event filter supports low water mark: kqueue's NOTE_LOWAT. * kqueue in FreeBSD 4.1-4.2 has no NOTE_LOWAT so we need a separate flag. */ #define NGX_USE_LOWAT_EVENT 0x00000010 /* * The event filter requires to do i/o operation until EAGAIN: epoll, rtsig. */ #define NGX_USE_GREEDY_EVENT 0x00000020 /* * The event filter is epoll. */ #define NGX_USE_EPOLL_EVENT 0x00000040 /* * No need to add or delete the event filters: rtsig. */ #define NGX_USE_RTSIG_EVENT 0x00000080 /* * No need to add or delete the event filters: overlapped, aio_read, * aioread, io_submit. */ #define NGX_USE_AIO_EVENT 0x00000100 /* * Need to add socket or handle only once: i/o completion port. * It also requires NGX_HAVE_AIO and NGX_USE_AIO_EVENT to be set. */ #define NGX_USE_IOCP_EVENT 0x00000200 /* * The event filter has no opaque data and requires file descriptors table: * poll, /dev/poll, rtsig. */ #define NGX_USE_FD_EVENT 0x00000400 /* * The event module handles periodic or absolute timer event by itself: * kqueue in FreeBSD 4.4, NetBSD 2.0, and MacOSX 10.4, Solaris 10's event ports. */ #define NGX_USE_TIMER_EVENT 0x00000800 /* * All event filters on file descriptor are deleted after a notification: * Solaris 10's event ports. */ #define NGX_USE_EVENTPORT_EVENT 0x00001000 /* * The event filter support vnode notifications: kqueue. */ #define NGX_USE_VNODE_EVENT 0x00002000 /* * The event filter is deleted just before the closing file. * Has no meaning for select and poll. * kqueue, epoll, rtsig, eventport: allows to avoid explicit delete, * because filter automatically is deleted * on file close, * * /dev/poll: we need to flush POLLREMOVE event * before closing file. */ #define NGX_CLOSE_EVENT 1 /* * disable temporarily event filter, this may avoid locks * in kernel malloc()/free(): kqueue. */ #define NGX_DISABLE_EVENT 2 /* * event must be passed to kernel right now, do not wait until batch processing. */ #define NGX_FLUSH_EVENT 4 /* these flags have a meaning only for kqueue */ #define NGX_LOWAT_EVENT 0 #define NGX_VNODE_EVENT 0 #if (NGX_HAVE_EPOLL) && !(NGX_HAVE_EPOLLRDHUP) #define EPOLLRDHUP 0 #endif #if (NGX_HAVE_KQUEUE) #define NGX_READ_EVENT EVFILT_READ #define NGX_WRITE_EVENT EVFILT_WRITE #undef NGX_VNODE_EVENT #define NGX_VNODE_EVENT EVFILT_VNODE /* * NGX_CLOSE_EVENT, NGX_LOWAT_EVENT, and NGX_FLUSH_EVENT are the module flags * and they must not go into a kernel so we need to choose the value * that must not interfere with any existent and future kqueue flags. * kqueue has such values - EV_FLAG1, EV_EOF, and EV_ERROR: * they are reserved and cleared on a kernel entrance. */ #undef NGX_CLOSE_EVENT #define NGX_CLOSE_EVENT EV_EOF #undef NGX_LOWAT_EVENT #define NGX_LOWAT_EVENT EV_FLAG1 #undef NGX_FLUSH_EVENT #define NGX_FLUSH_EVENT EV_ERROR #define NGX_LEVEL_EVENT 0 #define NGX_ONESHOT_EVENT EV_ONESHOT #define NGX_CLEAR_EVENT EV_CLEAR #undef NGX_DISABLE_EVENT #define NGX_DISABLE_EVENT EV_DISABLE #elif (NGX_HAVE_DEVPOLL || NGX_HAVE_EVENTPORT) #define NGX_READ_EVENT POLLIN #define NGX_WRITE_EVENT POLLOUT #define NGX_LEVEL_EVENT 0 #define NGX_ONESHOT_EVENT 1 #elif (NGX_HAVE_EPOLL) #define NGX_READ_EVENT (EPOLLIN|EPOLLRDHUP) #define NGX_WRITE_EVENT EPOLLOUT #define NGX_LEVEL_EVENT 0 #define NGX_CLEAR_EVENT EPOLLET #define NGX_ONESHOT_EVENT 0x70000000 #if 0 #define NGX_ONESHOT_EVENT EPOLLONESHOT #endif #elif (NGX_HAVE_POLL) #define NGX_READ_EVENT POLLIN #define NGX_WRITE_EVENT POLLOUT #define NGX_LEVEL_EVENT 0 #define NGX_ONESHOT_EVENT 1 #else /* select */ #define NGX_READ_EVENT 0 #define NGX_WRITE_EVENT 1 #define NGX_LEVEL_EVENT 0 #define NGX_ONESHOT_EVENT 1 #endif /* NGX_HAVE_KQUEUE */ #if (NGX_HAVE_IOCP) #define NGX_IOCP_ACCEPT 0 #define NGX_IOCP_IO 1 #define NGX_IOCP_CONNECT 2 #endif #ifndef NGX_CLEAR_EVENT #define NGX_CLEAR_EVENT 0 /* dummy declaration */ #endif #define ngx_process_changes ngx_event_actions.process_changes #define ngx_process_events ngx_event_actions.process_events #define ngx_done_events ngx_event_actions.done #define ngx_add_event ngx_event_actions.add #define ngx_del_event ngx_event_actions.del #define ngx_add_conn ngx_event_actions.add_conn #define ngx_del_conn ngx_event_actions.del_conn #define ngx_add_timer ngx_event_add_timer #define ngx_del_timer ngx_event_del_timer extern ngx_os_io_t ngx_io; #define ngx_recv ngx_io.recv #define ngx_recv_chain ngx_io.recv_chain #define ngx_udp_recv ngx_io.udp_recv #define ngx_send ngx_io.send #define ngx_send_chain ngx_io.send_chain #define NGX_EVENT_MODULE 0x544E5645 /* "EVNT" */ #define NGX_EVENT_CONF 0x02000000 typedef struct { ngx_uint_t connections; ngx_uint_t use; ngx_flag_t multi_accept; ngx_flag_t accept_mutex; ngx_msec_t accept_mutex_delay; u_char *name; #if (NGX_DEBUG) ngx_array_t debug_connection; #endif } ngx_event_conf_t; typedef struct { ngx_str_t *name; void *(*create_conf)(ngx_cycle_t *cycle); char *(*init_conf)(ngx_cycle_t *cycle, void *conf); ngx_event_actions_t actions; } ngx_event_module_t; extern ngx_atomic_t *ngx_connection_counter; extern ngx_atomic_t *ngx_accept_mutex_ptr; extern ngx_shmtx_t ngx_accept_mutex; extern ngx_uint_t ngx_use_accept_mutex; extern ngx_uint_t ngx_accept_events; extern ngx_uint_t ngx_accept_mutex_held; extern ngx_msec_t ngx_accept_mutex_delay; extern ngx_int_t ngx_accept_disabled; #if (NGX_STAT_STUB) extern ngx_atomic_t *ngx_stat_accepted; extern ngx_atomic_t *ngx_stat_handled; extern ngx_atomic_t *ngx_stat_requests; extern ngx_atomic_t *ngx_stat_active; extern ngx_atomic_t *ngx_stat_reading; extern ngx_atomic_t *ngx_stat_writing; extern ngx_atomic_t *ngx_stat_waiting; #endif #define NGX_UPDATE_TIME 1 #define NGX_POST_EVENTS 2 #define NGX_POST_THREAD_EVENTS 4 extern sig_atomic_t ngx_event_timer_alarm; extern ngx_uint_t ngx_event_flags; extern ngx_module_t ngx_events_module; extern ngx_module_t ngx_event_core_module; #define ngx_event_get_conf(conf_ctx, module) \ (*(ngx_get_conf(conf_ctx, ngx_events_module))) [module.ctx_index]; void ngx_event_accept(ngx_event_t *ev); ngx_int_t ngx_trylock_accept_mutex(ngx_cycle_t *cycle); u_char *ngx_accept_log_error(ngx_log_t *log, u_char *buf, size_t len); void ngx_process_events_and_timers(ngx_cycle_t *cycle); ngx_int_t ngx_handle_read_event(ngx_event_t *rev, ngx_uint_t flags); ngx_int_t ngx_handle_write_event(ngx_event_t *wev, size_t lowat); #if (NGX_WIN32) void ngx_event_acceptex(ngx_event_t *ev); ngx_int_t ngx_event_post_acceptex(ngx_listening_t *ls, ngx_uint_t n); u_char *ngx_acceptex_log_error(ngx_log_t *log, u_char *buf, size_t len); #endif ngx_int_t ngx_send_lowat(ngx_connection_t *c, size_t lowat); /* used in ngx_log_debugX() */ #define ngx_event_ident(p) ((ngx_connection_t *) (p))->fd #include #include #include #if (NGX_WIN32) #include #endif #endif /* _NGX_EVENT_H_INCLUDED_ */