/* 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(__FreeBSD_kernel__) ||                                           \

     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;

}