void uv_async_close(uv_loop_t* loop, uv_async_t* handle) {
if (!((uv_async_t*)handle)->async_sent) {
uv_want_endgame(loop, (uv_handle_t*) handle);
}
uv__handle_closing(handle);
}
void uv__loop_close(uv_loop_t* loop) {
size_t i;
uv__loops_remove(loop);
/* close the async handle without needing an extra loop iteration */
assert(!loop->wq_async.async_sent);
loop->wq_async.close_cb = NULL;
uv__handle_closing(&loop->wq_async);
uv__handle_close(&loop->wq_async);
for (i = 0; i < ARRAY_SIZE(loop->poll_peer_sockets); i++) {
SOCKET sock = loop->poll_peer_sockets[i];
if (sock != 0 && sock != INVALID_SOCKET)
closesocket(sock);
}
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);
uv__free(loop->timer_heap);
loop->timer_heap = NULL;
CloseHandle(loop->iocp);
}
void uv_signal_close(uv_loop_t* loop, uv_signal_t* handle) {
uv_signal_stop(handle);
uv__handle_closing(handle);
if (handle->pending_signum == 0) {
uv_want_endgame(loop, (uv_handle_t*)handle);
}
}
static void uv__slow_poll_close(uv_loop_t* loop, uv_poll_t* handle) {
handle->events = 0;
uv__handle_closing(handle);
if (handle->submitted_events_1 == 0 &&
handle->submitted_events_2 == 0) {
uv_want_endgame(loop, (uv_handle_t*) handle);
}
}
void uv_fs_event_close(uv_loop_t* loop, uv_fs_event_t* handle) {
uv_fs_event_stop(handle);
uv__handle_closing(handle);
if (!handle->req_pending) {
uv_want_endgame(loop, (uv_handle_t*)handle);
}
}
void uv_udp_close(uv_loop_t* loop, uv_udp_t* handle) {
uv_udp_recv_stop(handle);
closesocket(handle->socket);
uv__handle_closing(handle);
if (handle->reqs_pending == 0) {
uv_want_endgame(loop, (uv_handle_t*) handle);
}
}
static void uv__fast_poll_close(uv_loop_t* loop, uv_poll_t* handle) {
handle->events = 0;
uv__handle_closing(handle);
if (handle->submitted_events_1 == 0 &&
handle->submitted_events_2 == 0) {
uv_want_endgame(loop, (uv_handle_t*) handle);
} else {
/* Cancel outstanding poll requests by executing another, unique poll */
/* request that forces the outstanding ones to return. */
uv__fast_poll_cancel_poll_req(loop, handle);
}
}
void uv_process_close(uv_loop_t* loop, uv_process_t* handle) {
uv__handle_closing(handle);
if (handle->wait_handle != INVALID_HANDLE_VALUE) {
/* This blocks until either the wait was cancelled, or the callback has */
/* completed. */
BOOL r = UnregisterWaitEx(handle->wait_handle, INVALID_HANDLE_VALUE);
if (!r) {
/* This should never happen, and if it happens, we can't recover... */
uv_fatal_error(GetLastError(), "UnregisterWaitEx");
}
handle->wait_handle = INVALID_HANDLE_VALUE;
}
if (!handle->exit_cb_pending) {
uv_want_endgame(loop, (uv_handle_t*)handle);
}
}
void uv_pipe_close(uv_loop_t* loop, uv_pipe_t* handle) {
if (handle->flags & UV_HANDLE_READING) {
handle->flags &= ~UV_HANDLE_READING;
DECREASE_ACTIVE_COUNT(loop, handle);
}
if (handle->flags & UV_HANDLE_LISTENING) {
handle->flags &= ~UV_HANDLE_LISTENING;
DECREASE_ACTIVE_COUNT(loop, handle);
}
uv_pipe_cleanup(loop, handle);
if (handle->reqs_pending == 0) {
uv_want_endgame(loop, (uv_handle_t*) handle);
}
handle->flags &= ~(UV_HANDLE_READABLE | UV_HANDLE_WRITABLE);
uv__handle_closing(handle);
}
void uv_close(uv_handle_t* handle, uv_close_cb cb) {
uv_loop_t* loop = handle->loop;
if (handle->flags & UV__HANDLE_CLOSING) {
assert(0);
return;
}
handle->close_cb = cb;
/* Handle-specific close actions */
switch (handle->type) {
case UV_TCP:
uv_tcp_close(loop, (uv_tcp_t*)handle);
return;
case UV_NAMED_PIPE:
uv_pipe_close(loop, (uv_pipe_t*) handle);
return;
case UV_TTY:
uv_tty_close((uv_tty_t*) handle);
return;
case UV_UDP:
uv_udp_close(loop, (uv_udp_t*) handle);
return;
case UV_POLL:
uv_poll_close(loop, (uv_poll_t*) handle);
return;
case UV_TIMER:
uv_timer_stop((uv_timer_t*)handle);
uv__handle_closing(handle);
uv_want_endgame(loop, handle);
return;
case UV_PREPARE:
uv_prepare_stop((uv_prepare_t*)handle);
uv__handle_closing(handle);
uv_want_endgame(loop, handle);
return;
case UV_CHECK:
uv_check_stop((uv_check_t*)handle);
uv__handle_closing(handle);
uv_want_endgame(loop, handle);
return;
case UV_IDLE:
uv_idle_stop((uv_idle_t*)handle);
uv__handle_closing(handle);
uv_want_endgame(loop, handle);
return;
case UV_ASYNC:
uv_async_close(loop, (uv_async_t*) handle);
return;
case UV_SIGNAL:
uv_signal_close(loop, (uv_signal_t*) handle);
return;
case UV_PROCESS:
uv_process_close(loop, (uv_process_t*) handle);
return;
case UV_FS_EVENT:
uv_fs_event_close(loop, (uv_fs_event_t*) handle);
return;
case UV_FS_POLL:
uv__fs_poll_close((uv_fs_poll_t*) handle);
uv__handle_closing(handle);
uv_want_endgame(loop, handle);
return;
default:
/* Not supported */
abort();
}
}
void uv_tcp_close(uv_loop_t* loop, uv_tcp_t* tcp) {
int close_socket = 1;
if (tcp->flags & UV_HANDLE_READ_PENDING) {
/* In order for winsock to do a graceful close there must not be any */
/* any pending reads, or the socket must be shut down for writing */
if (!(tcp->flags & UV_HANDLE_SHARED_TCP_SOCKET)) {
/* Just do shutdown on non-shared sockets, which ensures graceful close. */
shutdown(tcp->socket, SD_SEND);
} else if (uv_tcp_try_cancel_io(tcp) == 0) {
/* In case of a shared socket, we try to cancel all outstanding I/O, */
/* If that works, don't close the socket yet - wait for the read req to */
/* return and close the socket in uv_tcp_endgame. */
close_socket = 0;
} else {
/* When cancelling isn't possible - which could happen when an LSP is */
/* present on an old Windows version, we will have to close the socket */
/* with a read pending. That is not nice because trailing sent bytes */
/* may not make it to the other side. */
}
} else if ((tcp->flags & UV_HANDLE_SHARED_TCP_SOCKET) &&
tcp->accept_reqs != NULL) {
/* Under normal circumstances closesocket() will ensure that all pending */
/* accept reqs are canceled. However, when the socket is shared the */
/* presence of another reference to the socket in another process will */
/* keep the accept reqs going, so we have to ensure that these are */
/* canceled. */
if (uv_tcp_try_cancel_io(tcp) != 0) {
/* When cancellation is not possible, there is another option: we can */
/* close the incoming sockets, which will also cancel the accept */
/* operations. However this is not cool because we might inadvertedly */
/* close a socket that just accepted a new connection, which will */
/* cause the connection to be aborted. */
unsigned int i;
for (i = 0; i < uv_simultaneous_server_accepts; i++) {
uv_tcp_accept_t* req = &tcp->accept_reqs[i];
if (req->accept_socket != INVALID_SOCKET &&
!HasOverlappedIoCompleted(&req->overlapped)) {
closesocket(req->accept_socket);
req->accept_socket = INVALID_SOCKET;
}
}
}
}
if (tcp->flags & UV_HANDLE_READING) {
tcp->flags &= ~UV_HANDLE_READING;
DECREASE_ACTIVE_COUNT(loop, tcp);
}
if (tcp->flags & UV_HANDLE_LISTENING) {
tcp->flags &= ~UV_HANDLE_LISTENING;
DECREASE_ACTIVE_COUNT(loop, tcp);
}
if (close_socket) {
closesocket(tcp->socket);
tcp->flags |= UV_HANDLE_TCP_SOCKET_CLOSED;
}
tcp->flags &= ~(UV_HANDLE_READABLE | UV_HANDLE_WRITABLE);
uv__handle_closing(tcp);
if (tcp->reqs_pending == 0) {
uv_want_endgame(tcp->loop, (uv_handle_t*)tcp);
}
}
void uv_async_close(uv_loop_t* loop, uv_async_t* handle) {
QUEUE_REMOVE(&handle->queue);
uv_want_endgame(loop, (uv_handle_t*) handle);
uv__handle_closing(handle);
}
