loop.c File Reference

#include "uv.h"
#include "uv/tree.h"
#include "internal.h"
#include "heap-inl.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

Go to the source code of this file.

Functions
int	uv_loop_init (uv_loop_t *loop)
int	uv_loop_fork (uv_loop_t *loop)
void	uv__loop_close (uv_loop_t *loop)
int	uv__loop_configure (uv_loop_t *loop, uv_loop_option option, va_list ap)

Function Documentation

uv__loop_close()

void uv__loop_close

(

uv_loop_t *

loop

)

Definition at line 165 of file loop.c.

                                     {
  uv__loop_internal_fields_t* lfields;
 
  uv__signal_loop_cleanup(loop);
  uv__platform_loop_delete(loop);
  uv__async_stop(loop);
 
  if (loop->emfile_fd != -1) {
    uv__close(loop->emfile_fd);
    loop->emfile_fd = -1;
  }
 
  if (loop->backend_fd != -1) {
    uv__close(loop->backend_fd);
    loop->backend_fd = -1;
  }
 
  uv_mutex_lock(&loop->wq_mutex);
  assert(QUEUE_EMPTY(&loop->wq) && "thread pool work queue not empty!");
  assert(!uv__has_active_reqs(loop));
  uv_mutex_unlock(&loop->wq_mutex);
  uv_mutex_destroy(&loop->wq_mutex);
 
  /*
   * Note that all thread pool stuff is finished at this point and
   * it is safe to just destroy rw lock
   */
  uv_rwlock_destroy(&loop->cloexec_lock);
 
#if 0
  assert(QUEUE_EMPTY(&loop->pending_queue));
  assert(QUEUE_EMPTY(&loop->watcher_queue));
  assert(loop->nfds == 0);
#endif
 
  uv__free(loop->watchers);
  loop->watchers = NULL;
  loop->nwatchers = 0;
 
  lfields = uv__get_internal_fields(loop);
  uv_mutex_destroy(&lfields->loop_metrics.lock);
  uv__free(lfields);
  loop->internal_fields = NULL;
}

References assert(), uv_loop_s::internal_fields, uv__loop_metrics_s::lock, loop, uv__loop_internal_fields_s::loop_metrics, NULL, QUEUE_EMPTY, uv__async_stop(), uv__close(), uv__free(), uv__get_internal_fields, uv__has_active_reqs, uv__platform_loop_delete(), uv__signal_loop_cleanup(), uv_mutex_destroy(), uv_mutex_lock(), uv_mutex_unlock(), and uv_rwlock_destroy().

Referenced by uv_loop_close().

uv__loop_configure()

int uv__loop_configure	(	uv_loop_t *	loop,
		uv_loop_option	option,
		va_list	ap
	)

Definition at line 211 of file loop.c.

                                                                           {
  uv__loop_internal_fields_t* lfields;
 
  lfields = uv__get_internal_fields(loop);
  if (option == UV_METRICS_IDLE_TIME) {
    lfields->flags |= UV_METRICS_IDLE_TIME;
    return 0;
  }
 
  if (option != UV_LOOP_BLOCK_SIGNAL)
    return UV_ENOSYS;
 
  if (va_arg(ap, int) != SIGPROF)
    return UV_EINVAL;
 
  loop->flags |= UV_LOOP_BLOCK_SIGPROF;
  return 0;
}

References uv__loop_internal_fields_s::flags, loop, uv__get_internal_fields, UV_LOOP_BLOCK_SIGNAL, UV_LOOP_BLOCK_SIGPROF, and UV_METRICS_IDLE_TIME.

Referenced by uv_loop_configure().

uv_loop_fork()

int uv_loop_fork

(

uv_loop_t *

loop

)

Definition at line 132 of file loop.c.

                                  {
  int err;
  unsigned int i;
  uv__io_t* w;
 
  err = uv__io_fork(loop);
  if (err)
    return err;
 
  err = uv__async_fork(loop);
  if (err)
    return err;
 
  err = uv__signal_loop_fork(loop);
  if (err)
    return err;
 
  /* Rearm all the watchers that aren't re-queued by the above. */
  for (i = 0; i < loop->nwatchers; i++) {
    w = loop->watchers[i];
    if (w == NULL)
      continue;
 
    if (w->pevents != 0 && QUEUE_EMPTY(&w->watcher_queue)) {
      w->events = 0; /* Force re-registration in uv__io_poll. */
      QUEUE_INSERT_TAIL(&loop->watcher_queue, &w->watcher_queue);
    }
  }
 
  return 0;
}

uv_loop_init()

int uv_loop_init

(

uv_loop_t *

loop

)

Definition at line 30 of file loop.c.

                                  {
  uv__loop_internal_fields_t* lfields;
  void* saved_data;
  int err;
 
 
  saved_data = loop->data;
  memset(loop, 0, sizeof(*loop));
  loop->data = saved_data;
 
  lfields = (uv__loop_internal_fields_t*) uv__calloc(1, sizeof(*lfields));
  if (lfields == NULL)
    return UV_ENOMEM;
  loop->internal_fields = lfields;
 
  err = uv_mutex_init(&lfields->loop_metrics.lock);
  if (err)
    goto fail_metrics_mutex_init;
 
  heap_init((struct heap*) &loop->timer_heap);
  QUEUE_INIT(&loop->wq);
  QUEUE_INIT(&loop->idle_handles);
  QUEUE_INIT(&loop->async_handles);
  QUEUE_INIT(&loop->check_handles);
  QUEUE_INIT(&loop->prepare_handles);
  QUEUE_INIT(&loop->handle_queue);
 
  loop->active_handles = 0;
  loop->active_reqs.count = 0;
  loop->nfds = 0;
  loop->watchers = NULL;
  loop->nwatchers = 0;
  QUEUE_INIT(&loop->pending_queue);
  QUEUE_INIT(&loop->watcher_queue);
 
  loop->closing_handles = NULL;
  uv__update_time(loop);
  loop->async_io_watcher.fd = -1;
  loop->async_wfd = -1;
  loop->signal_pipefd[0] = -1;
  loop->signal_pipefd[1] = -1;
  loop->backend_fd = -1;
  loop->emfile_fd = -1;
 
  loop->timer_counter = 0;
  loop->stop_flag = 0;
 
  err = uv__platform_loop_init(loop);
  if (err)
    goto fail_platform_init;
 
  uv__signal_global_once_init();
  err = uv_signal_init(loop, &loop->child_watcher);
  if (err)
    goto fail_signal_init;
 
  uv__handle_unref(&loop->child_watcher);
  loop->child_watcher.flags |= UV_HANDLE_INTERNAL;
  QUEUE_INIT(&loop->process_handles);
 
  err = uv_rwlock_init(&loop->cloexec_lock);
  if (err)
    goto fail_rwlock_init;
 
  err = uv_mutex_init(&loop->wq_mutex);
  if (err)
    goto fail_mutex_init;
 
  err = uv_async_init(loop, &loop->wq_async, uv__work_done);
  if (err)
    goto fail_async_init;
 
  uv__handle_unref(&loop->wq_async);
  loop->wq_async.flags |= UV_HANDLE_INTERNAL;
 
  return 0;
 
fail_async_init:
  uv_mutex_destroy(&loop->wq_mutex);
 
fail_mutex_init:
  uv_rwlock_destroy(&loop->cloexec_lock);
 
fail_rwlock_init:
  uv__signal_loop_cleanup(loop);
 
fail_signal_init:
  uv__platform_loop_delete(loop);
 
fail_platform_init:
  uv_mutex_destroy(&lfields->loop_metrics.lock);
 
fail_metrics_mutex_init:
  uv__free(lfields);
  loop->internal_fields = NULL;
 
  uv__free(loop->watchers);
  loop->nwatchers = 0;
  return err;
}