text: /* 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.
   */
  
  #include "uv.h"
  #include "task.h"
  #include <stdio.h>
  #include <stdlib.h>
  #include <errno.h>
  
  #ifndef HAVE_KQUEUE
  # if defined(__APPLE__) ||                                                    \
       defined(__DragonFly__) ||                                                \
       defined(__FreeBSD__) ||                                                  \
       defined(__OpenBSD__) ||                                                  \
       defined(__NetBSD__)
  #  define HAVE_KQUEUE 1
  # endif
  #endif
  
  #ifndef HAVE_EPOLL
  # if defined(__linux__)
  #  define HAVE_EPOLL 1
  # endif
  #endif
  
  #if defined(HAVE_KQUEUE) || defined(HAVE_EPOLL)
  
  #if defined(HAVE_KQUEUE)
  # include <sys/types.h>
  # include <sys/event.h>
  # include <sys/time.h>
  #endif
  
  #if defined(HAVE_EPOLL)
  # include <sys/epoll.h>
  #endif
  
  static uv_thread_t embed_thread;
  static uv_sem_t embed_sem;
  static uv_timer_t embed_timer;
  static uv_async_t embed_async;
  static volatile int embed_closed;
  
  static int embed_timer_called;
  
  
  static void embed_thread_runner(void* arg) {
    int r;
    int fd;
    int timeout;
  
    while (!embed_closed) {
      fd = uv_backend_fd(uv_default_loop());
      timeout = uv_backend_timeout(uv_default_loop());
  
      do {
  #if defined(HAVE_KQUEUE)
        struct timespec ts;
        ts.tv_sec = timeout / 1000;
        ts.tv_nsec = (timeout % 1000) * 1000000;
        r = kevent(fd, NULL, 0, NULL, 0, &ts);
  #elif defined(HAVE_EPOLL)
        {
          struct epoll_event ev;
          r = epoll_wait(fd, &ev, 1, timeout);
        }
  #endif
      } while (r == -1 && errno == EINTR);
      uv_async_send(&embed_async);
      uv_sem_wait(&embed_sem);
    }
  }
  
  
  static void embed_cb(uv_async_t* async) {
    uv_run(uv_default_loop(), UV_RUN_ONCE);
  
    uv_sem_post(&embed_sem);
  }
  
  
  static void embed_timer_cb(uv_timer_t* timer) {
    embed_timer_called++;
    embed_closed = 1;
  
    uv_close((uv_handle_t*) &embed_async, NULL);
  }
  #endif
  
  
  TEST_IMPL(embed) {
  #if defined(HAVE_KQUEUE) || defined(HAVE_EPOLL)
    uv_loop_t external;
  
    ASSERT(0 == uv_loop_init(&external));
  
    embed_timer_called = 0;
    embed_closed = 0;
  
    uv_async_init(&external, &embed_async, embed_cb);
  
    /* Start timer in default loop */
    uv_timer_init(uv_default_loop(), &embed_timer);
    uv_timer_start(&embed_timer, embed_timer_cb, 250, 0);
  
    /* Start worker that will interrupt external loop */
    uv_sem_init(&embed_sem, 0);
    uv_thread_create(&embed_thread, embed_thread_runner, NULL);
  
    /* But run external loop */
    uv_run(&external, UV_RUN_DEFAULT);
  
    uv_thread_join(&embed_thread);
    uv_loop_close(&external);
  
    ASSERT(embed_timer_called == 1);
  #endif
  
    return 0;
  }
  