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libuv/src/unix/core.c  view on Meta::CPAN

#include <sys/ioctl.h>
#endif

static int uv__run_pending(uv_loop_t* loop);

/* Verify that uv_buf_t is ABI-compatible with struct iovec. */
STATIC_ASSERT(sizeof(uv_buf_t) == sizeof(struct iovec));
STATIC_ASSERT(sizeof(&((uv_buf_t*) 0)->base) ==
              sizeof(((struct iovec*) 0)->iov_base));
STATIC_ASSERT(sizeof(&((uv_buf_t*) 0)->len) ==
              sizeof(((struct iovec*) 0)->iov_len));
STATIC_ASSERT(offsetof(uv_buf_t, base) == offsetof(struct iovec, iov_base));
STATIC_ASSERT(offsetof(uv_buf_t, len) == offsetof(struct iovec, iov_len));


uint64_t uv_hrtime(void) {
  return uv__hrtime(UV_CLOCK_PRECISE);
}


void uv_close(uv_handle_t* handle, uv_close_cb close_cb) {
  assert(!uv__is_closing(handle));

  handle->flags |= UV_HANDLE_CLOSING;
  handle->close_cb = close_cb;

  switch (handle->type) {
  case UV_NAMED_PIPE:
    uv__pipe_close((uv_pipe_t*)handle);
    break;

  case UV_TTY:
    uv__stream_close((uv_stream_t*)handle);
    break;

  case UV_TCP:
    uv__tcp_close((uv_tcp_t*)handle);
    break;

  case UV_UDP:
    uv__udp_close((uv_udp_t*)handle);
    break;

  case UV_PREPARE:
    uv__prepare_close((uv_prepare_t*)handle);
    break;

  case UV_CHECK:
    uv__check_close((uv_check_t*)handle);
    break;

  case UV_IDLE:
    uv__idle_close((uv_idle_t*)handle);
    break;

  case UV_ASYNC:
    uv__async_close((uv_async_t*)handle);
    break;

  case UV_TIMER:
    uv__timer_close((uv_timer_t*)handle);
    break;

  case UV_PROCESS:
    uv__process_close((uv_process_t*)handle);
    break;

  case UV_FS_EVENT:
    uv__fs_event_close((uv_fs_event_t*)handle);
    break;

  case UV_POLL:
    uv__poll_close((uv_poll_t*)handle);
    break;

  case UV_FS_POLL:
    uv__fs_poll_close((uv_fs_poll_t*)handle);
    /* Poll handles use file system requests, and one of them may still be
     * running. The poll code will call uv__make_close_pending() for us. */
    return;

  case UV_SIGNAL:
    uv__signal_close((uv_signal_t*) handle);
    /* Signal handles may not be closed immediately. The signal code will
     * itself close uv__make_close_pending whenever appropriate. */
    return;

  default:
    assert(0);
  }

  uv__make_close_pending(handle);
}

int uv__socket_sockopt(uv_handle_t* handle, int optname, int* value) {
  int r;
  int fd;
  socklen_t len;

  if (handle == NULL || value == NULL)
    return UV_EINVAL;

  if (handle->type == UV_TCP || handle->type == UV_NAMED_PIPE)
    fd = uv__stream_fd((uv_stream_t*) handle);
  else if (handle->type == UV_UDP)
    fd = ((uv_udp_t *) handle)->io_watcher.fd;
  else
    return UV_ENOTSUP;

  len = sizeof(*value);

  if (*value == 0)
    r = getsockopt(fd, SOL_SOCKET, optname, value, &len);
  else
    r = setsockopt(fd, SOL_SOCKET, optname, (const void*) value, len);

  if (r < 0)
    return UV__ERR(errno);

  return 0;
}

libuv/src/unix/core.c  view on Meta::CPAN

    q = p->next_closing;
    uv__finish_close(p);
    p = q;
  }
}


int uv_is_closing(const uv_handle_t* handle) {
  return uv__is_closing(handle);
}


int uv_backend_fd(const uv_loop_t* loop) {
  return loop->backend_fd;
}


int uv_backend_timeout(const uv_loop_t* loop) {
  if (loop->stop_flag != 0)
    return 0;

  if (!uv__has_active_handles(loop) && !uv__has_active_reqs(loop))
    return 0;

  if (!QUEUE_EMPTY(&loop->idle_handles))
    return 0;

  if (!QUEUE_EMPTY(&loop->pending_queue))
    return 0;

  if (loop->closing_handles)
    return 0;

  return uv__next_timeout(loop);
}


static int uv__loop_alive(const uv_loop_t* loop) {
  return uv__has_active_handles(loop) ||
         uv__has_active_reqs(loop) ||
         loop->closing_handles != NULL;
}


int uv_loop_alive(const uv_loop_t* loop) {
    return uv__loop_alive(loop);
}


int uv_run(uv_loop_t* loop, uv_run_mode mode) {
  int timeout;
  int r;
  int ran_pending;

  r = uv__loop_alive(loop);
  if (!r)
    uv__update_time(loop);

  while (r != 0 && loop->stop_flag == 0) {
    uv__update_time(loop);
    uv__run_timers(loop);
    ran_pending = uv__run_pending(loop);
    uv__run_idle(loop);
    uv__run_prepare(loop);

    timeout = 0;
    if ((mode == UV_RUN_ONCE && !ran_pending) || mode == UV_RUN_DEFAULT)
      timeout = uv_backend_timeout(loop);

    uv__io_poll(loop, timeout);
    uv__run_check(loop);
    uv__run_closing_handles(loop);

    if (mode == UV_RUN_ONCE) {
      /* UV_RUN_ONCE implies forward progress: at least one callback must have
       * been invoked when it returns. uv__io_poll() can return without doing
       * I/O (meaning: no callbacks) when its timeout expires - which means we
       * have pending timers that satisfy the forward progress constraint.
       *
       * UV_RUN_NOWAIT makes no guarantees about progress so it's omitted from
       * the check.
       */
      uv__update_time(loop);
      uv__run_timers(loop);
    }

    r = uv__loop_alive(loop);
    if (mode == UV_RUN_ONCE || mode == UV_RUN_NOWAIT)
      break;
  }

  /* The if statement lets gcc compile it to a conditional store. Avoids
   * dirtying a cache line.
   */
  if (loop->stop_flag != 0)
    loop->stop_flag = 0;

  return r;
}


void uv_update_time(uv_loop_t* loop) {
  uv__update_time(loop);
}


int uv_is_active(const uv_handle_t* handle) {
  return uv__is_active(handle);
}


/* Open a socket in non-blocking close-on-exec mode, atomically if possible. */
int uv__socket(int domain, int type, int protocol) {
  int sockfd;
  int err;

#if defined(SOCK_NONBLOCK) && defined(SOCK_CLOEXEC)
  sockfd = socket(domain, type | SOCK_NONBLOCK | SOCK_CLOEXEC, protocol);
  if (sockfd != -1)
    return sockfd;

  if (errno != EINVAL)
    return UV__ERR(errno);
#endif

  sockfd = socket(domain, type, protocol);
  if (sockfd == -1)
    return UV__ERR(errno);

  err = uv__nonblock(sockfd, 1);
  if (err == 0)
    err = uv__cloexec(sockfd, 1);

  if (err) {
    uv__close(sockfd);
    return err;
  }

#if defined(SO_NOSIGPIPE)
  {
    int on = 1;
    setsockopt(sockfd, SOL_SOCKET, SO_NOSIGPIPE, &on, sizeof(on));
  }
#endif