#pragma once

#include <stdbool.h>

// The private_vm_api_access.c includes the RUBY_MJIT_HEADER which replaces and conflicts with any other Ruby headers;
// so we use PRIVATE_VM_API_ACCESS_SKIP_RUBY_INCLUDES to be able to include private_vm_api_access.h on that file
// without also dragging the incompatible includes
#ifndef PRIVATE_VM_API_ACCESS_SKIP_RUBY_INCLUDES
  #include <ruby/thread_native.h>
  #include <ruby/vm.h>
#endif

#include "extconf.h"

// Contains the current gvl owner, and a flag to indicate if it is valid
typedef struct {
  bool valid;
  rb_nativethread_id_t owner;
} current_gvl_owner;

rb_nativethread_id_t pthread_id_for(VALUE thread);
bool is_current_thread_holding_the_gvl(void);
current_gvl_owner gvl_owner(void);
uint64_t native_thread_id_for(VALUE thread);
ptrdiff_t stack_depth_for(VALUE thread);
void ddtrace_thread_list(VALUE result_array);
bool is_thread_alive(VALUE thread);
VALUE thread_name_for(VALUE thread);

int ddtrace_rb_profile_frames(VALUE thread, int start, int limit, VALUE *buff, int *lines, bool* is_ruby_frame);
// Returns true if the current thread belongs to the main Ractor or if Ruby has no Ractor support
bool ddtrace_rb_ractor_main_p(void);

// Ruby 3.0 finally added support for showing CFUNC frames (frames for methods written using native code)
// in stack traces gathered via `rb_profile_frames` (https://github.com/ruby/ruby/pull/3299).
// To access this information on older Rubies, beyond using our custom `ddtrace_rb_profile_frames` above, we also need
// to backport the Ruby 3.0+ version of `rb_profile_frame_method_name`.
#ifdef USE_BACKPORTED_RB_PROFILE_FRAME_METHOD_NAME
  VALUE ddtrace_rb_profile_frame_method_name(VALUE frame);
#else // Ruby > 3.0, just use the stock functionality
  #define ddtrace_rb_profile_frame_method_name rb_profile_frame_method_name
#endif

// See comment on `record_placeholder_stack_in_native_code` for a full explanation of what this means (and why we don't just return 0)
#define PLACEHOLDER_STACK_IN_NATIVE_CODE -1

// This method provides the file and line of the "invoke location" of a thread (first file:line of the block used to
// start the thread), if any.
// This is what Ruby shows in `Thread#to_s`.
// The file is returned directly, and the line is recorded onto *line_location.
VALUE invoke_location_for(VALUE thread, int *line_location);