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 close_cb) {
uv_async_t* async;
uv_stream_t* stream;
uv_process_t* process;
handle->close_cb = close_cb;
switch (handle->type) {
case UV_NAMED_PIPE:
uv_pipe_cleanup((uv_pipe_t*)handle);
/* Fall through. */
case UV_TTY:
case UV_TCP:
stream = (uv_stream_t*)handle;
uv_read_stop(stream);
ev_io_stop(stream->loop->ev, &stream->write_watcher);
uv__close(stream->fd);
stream->fd = -1;
if (stream->accepted_fd >= 0) {
uv__close(stream->accepted_fd);
stream->accepted_fd = -1;
}
assert(!ev_is_active(&stream->read_watcher));
assert(!ev_is_active(&stream->write_watcher));
break;
case UV_UDP:
uv__udp_start_close((uv_udp_t*)handle);
break;
case UV_PREPARE:
uv_prepare_stop((uv_prepare_t*) handle);
break;
case UV_CHECK:
uv_check_stop((uv_check_t*) handle);
break;
case UV_IDLE:
uv_idle_stop((uv_idle_t*) handle);
break;
case UV_ASYNC:
async = (uv_async_t*)handle;
ev_async_stop(async->loop->ev, &async->async_watcher);
ev_ref(async->loop->ev);
break;
case UV_TIMER:
uv_timer_stop((uv_timer_t*)handle);
break;
case UV_PROCESS:
process = (uv_process_t*)handle;
ev_child_stop(process->loop->ev, &process->child_watcher);
break;
case UV_FS_EVENT:
uv__fs_event_destroy((uv_fs_event_t*)handle);
break;
default:
assert(0);
}
handle->flags |= UV_CLOSING;
/* This is used to call the on_close callback in the next loop. */
ev_idle_start(handle->loop->ev, &handle->next_watcher);
ev_feed_event(handle->loop->ev, &handle->next_watcher, EV_IDLE);
assert(ev_is_pending(&handle->next_watcher));
}
static int uv__create_stdio_pipe_pair(uv_loop_t* loop, uv_pipe_t* server_pipe,
HANDLE* child_pipe_ptr, unsigned int flags) {
char pipe_name[64];
SECURITY_ATTRIBUTES sa;
DWORD server_access = 0;
DWORD client_access = 0;
HANDLE child_pipe = INVALID_HANDLE_VALUE;
if (flags & UV_READABLE_PIPE) {
server_access |= PIPE_ACCESS_OUTBOUND;
client_access |= GENERIC_READ | FILE_WRITE_ATTRIBUTES;
}
if (flags & UV_WRITABLE_PIPE) {
server_access |= PIPE_ACCESS_INBOUND;
client_access |= GENERIC_WRITE;
}
/* Create server pipe handle. */
if (uv_stdio_pipe_server(loop,
server_pipe,
server_access,
pipe_name,
sizeof(pipe_name)) < 0) {
goto error;
}
/* Create child pipe handle. */
sa.nLength = sizeof sa;
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
child_pipe = CreateFileA(pipe_name,
client_access,
0,
&sa,
OPEN_EXISTING,
server_pipe->ipc ? FILE_FLAG_OVERLAPPED : 0,
NULL);
if (child_pipe == INVALID_HANDLE_VALUE) {
uv__set_sys_error(loop, GetLastError());
goto error;
}
#ifndef NDEBUG
/* Validate that the pipe was opened in the right mode. */
{
DWORD mode;
BOOL r = GetNamedPipeHandleState(child_pipe,
&mode,
NULL,
NULL,
NULL,
NULL,
0);
assert(r == TRUE);
assert(mode == (PIPE_READMODE_BYTE | PIPE_WAIT));
}
#endif
/* Do a blocking ConnectNamedPipe. This should not block because we have */
/* both ends of the pipe created. */
if (!ConnectNamedPipe(server_pipe->handle, NULL)) {
if (GetLastError() != ERROR_PIPE_CONNECTED) {
uv__set_sys_error(loop, GetLastError());
goto error;
}
}
*child_pipe_ptr = child_pipe;
return 0;
error:
if (server_pipe->handle != INVALID_HANDLE_VALUE) {
uv_pipe_cleanup(loop, server_pipe);
}
if (child_pipe != INVALID_HANDLE_VALUE) {
CloseHandle(child_pipe);
}
return -1;
}
static int uv__create_stdio_pipe_pair(uv_loop_t* loop,
uv_pipe_t* server_pipe, HANDLE* child_pipe_ptr, unsigned int flags) {
char pipe_name[64];
SECURITY_ATTRIBUTES sa;
DWORD server_access = 0;
DWORD client_access = 0;
HANDLE child_pipe = INVALID_HANDLE_VALUE;
int err;
if (flags & UV_READABLE_PIPE) {
/* The server needs inbound access too, otherwise CreateNamedPipe() */
/* won't give us the FILE_READ_ATTRIBUTES permission. We need that to */
/* probe the state of the write buffer when we're trying to shutdown */
/* the pipe. */
server_access |= PIPE_ACCESS_OUTBOUND | PIPE_ACCESS_INBOUND;
client_access |= GENERIC_READ | FILE_WRITE_ATTRIBUTES;
}
if (flags & UV_WRITABLE_PIPE) {
server_access |= PIPE_ACCESS_INBOUND;
client_access |= GENERIC_WRITE | FILE_READ_ATTRIBUTES;
}
/* Create server pipe handle. */
err = uv_stdio_pipe_server(loop,
server_pipe,
server_access,
pipe_name,
sizeof(pipe_name));
if (err)
goto error;
/* Create child pipe handle. */
sa.nLength = sizeof sa;
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
child_pipe = CreateFileA(pipe_name,
client_access,
0,
&sa,
OPEN_EXISTING,
server_pipe->ipc ? FILE_FLAG_OVERLAPPED : 0,
NULL);
if (child_pipe == INVALID_HANDLE_VALUE) {
err = GetLastError();
goto error;
}
#ifndef NDEBUG
/* Validate that the pipe was opened in the right mode. */
{
DWORD mode;
BOOL r = GetNamedPipeHandleState(child_pipe,
&mode,
NULL,
NULL,
NULL,
NULL,
0);
assert(r == TRUE);
assert(mode == (PIPE_READMODE_BYTE | PIPE_WAIT));
}
#endif
/* Do a blocking ConnectNamedPipe. This should not block because we have */
/* both ends of the pipe created. */
if (!ConnectNamedPipe(server_pipe->handle, NULL)) {
if (GetLastError() != ERROR_PIPE_CONNECTED) {
err = GetLastError();
goto error;
}
}
/* The server end is now readable and/or writable. */
if (flags & UV_READABLE_PIPE)
server_pipe->flags |= UV_HANDLE_WRITABLE;
if (flags & UV_WRITABLE_PIPE)
server_pipe->flags |= UV_HANDLE_READABLE;
*child_pipe_ptr = child_pipe;
return 0;
error:
if (server_pipe->handle != INVALID_HANDLE_VALUE) {
uv_pipe_cleanup(loop, server_pipe);
}
if (child_pipe != INVALID_HANDLE_VALUE) {
CloseHandle(child_pipe);
}
return err;
}
