static void uv__drain(uv_handle_t* handle) {
assert(!uv_write_queue_head(handle));
assert(handle->write_queue_size == 0);
ev_io_stop(EV_DEFAULT_ &handle->write_watcher);
/* Shutdown? */
if (uv_flag_is_set(handle, UV_SHUTTING) &&
!uv_flag_is_set(handle, UV_CLOSING) &&
!uv_flag_is_set(handle, UV_SHUT)) {
assert(handle->shutdown_req);
uv_req_t* req = handle->shutdown_req;
uv_shutdown_cb cb = req->cb;
if (shutdown(handle->fd, SHUT_WR)) {
/* Error. Nothing we can do, close the handle. */
uv_err_new(handle, errno);
uv_close(handle);
if (cb) cb(req, -1);
} else {
uv_err_new(handle, 0);
uv_flag_set(handle, UV_SHUT);
if (cb) cb(req, 0);
}
}
}
int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle, uv_shutdown_cb cb) {
uv_tcp_t* tcp = (uv_tcp_t*)handle;
assert(handle->type == UV_TCP &&
"uv_shutdown (unix) only supports uv_tcp_t right now");
assert(tcp->fd >= 0);
/* Initialize request */
uv__req_init((uv_req_t*)req);
req->handle = handle;
req->cb = cb;
if (uv_flag_is_set((uv_handle_t*)tcp, UV_SHUT) ||
uv_flag_is_set((uv_handle_t*)tcp, UV_CLOSED) ||
uv_flag_is_set((uv_handle_t*)tcp, UV_CLOSING)) {
return -1;
}
tcp->shutdown_req = req;
req->type = UV_SHUTDOWN;
uv_flag_set((uv_handle_t*)tcp, UV_SHUTTING);
ev_io_start(EV_DEFAULT_UC_ &tcp->write_watcher);
return 0;
}
static void uv__drain(uv_tcp_t* tcp) {
uv_shutdown_t* req;
assert(!uv_write_queue_head(tcp));
assert(tcp->write_queue_size == 0);
ev_io_stop(EV_DEFAULT_ &tcp->write_watcher);
/* Shutdown? */
if (uv_flag_is_set((uv_handle_t*)tcp, UV_SHUTTING) &&
!uv_flag_is_set((uv_handle_t*)tcp, UV_CLOSING) &&
!uv_flag_is_set((uv_handle_t*)tcp, UV_SHUT)) {
assert(tcp->shutdown_req);
req = tcp->shutdown_req;
if (shutdown(tcp->fd, SHUT_WR)) {
/* Error. Report it. User should call uv_close(). */
uv_err_new((uv_handle_t*)tcp, errno);
if (req->cb) {
req->cb(req, -1);
}
} else {
uv_err_new((uv_handle_t*)tcp, 0);
uv_flag_set((uv_handle_t*)tcp, UV_SHUT);
if (req->cb) {
req->cb(req, 0);
}
}
}
}
int uv_read_start(uv_stream_t* stream, uv_alloc_cb alloc_cb, uv_read_cb read_cb) {
uv_tcp_t* tcp = (uv_tcp_t*)stream;
/* The UV_READING flag is irrelevant of the state of the tcp - it just
* expresses the desired state of the user.
*/
uv_flag_set((uv_handle_t*)tcp, UV_READING);
/* TODO: try to do the read inline? */
/* TODO: keep track of tcp state. If we've gotten a EOF then we should
* not start the IO watcher.
*/
assert(tcp->fd >= 0);
assert(alloc_cb);
tcp->read_cb = read_cb;
tcp->alloc_cb = alloc_cb;
/* These should have been set by uv_tcp_init. */
assert(tcp->read_watcher.data == tcp);
assert(tcp->read_watcher.cb == uv__tcp_io);
ev_io_start(EV_DEFAULT_UC_ &tcp->read_watcher);
return 0;
}
void uv__finish_close(uv_handle_t* handle) {
assert(uv_flag_is_set(handle, UV_CLOSING));
assert(!uv_flag_is_set(handle, UV_CLOSED));
uv_flag_set(handle, UV_CLOSED);
switch (handle->type) {
case UV_TCP:
/* XXX Is it necessary to stop these watchers here? weren't they
* supposed to be stopped in uv_close()?
*/
ev_io_stop(EV_DEFAULT_ &handle->write_watcher);
ev_io_stop(EV_DEFAULT_ &handle->read_watcher);
assert(!ev_is_active(&handle->read_watcher));
assert(!ev_is_active(&handle->write_watcher));
close(handle->fd);
handle->fd = -1;
if (handle->accepted_fd >= 0) {
close(handle->accepted_fd);
handle->accepted_fd = -1;
}
break;
case UV_PREPARE:
assert(!ev_is_active(&handle->prepare_watcher));
break;
case UV_CHECK:
assert(!ev_is_active(&handle->check_watcher));
break;
case UV_IDLE:
assert(!ev_is_active(&handle->idle_watcher));
break;
case UV_ASYNC:
assert(!ev_is_active(&handle->async_watcher));
break;
case UV_TIMER:
assert(!ev_is_active(&handle->timer_watcher));
break;
default:
assert(0);
break;
}
ev_idle_stop(EV_DEFAULT_ &handle->next_watcher);
if (handle->close_cb) {
handle->close_cb(handle, 0);
}
ev_unref(EV_DEFAULT_UC);
}
int uv_close(uv_handle_t* handle, uv_close_cb close_cb) {
uv_tcp_t* tcp;
uv_async_t* async;
uv_timer_t* timer;
handle->close_cb = close_cb;
switch (handle->type) {
case UV_TCP:
tcp = (uv_tcp_t*) handle;
uv_read_stop((uv_stream_t*)tcp);
ev_io_stop(EV_DEFAULT_ &tcp->write_watcher);
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(EV_DEFAULT_ &async->async_watcher);
ev_ref(EV_DEFAULT_UC);
break;
case UV_TIMER:
timer = (uv_timer_t*)handle;
if (ev_is_active(&timer->timer_watcher)) {
ev_ref(EV_DEFAULT_UC);
}
ev_timer_stop(EV_DEFAULT_ &timer->timer_watcher);
break;
default:
assert(0);
return -1;
}
uv_flag_set(handle, UV_CLOSING);
/* This is used to call the on_close callback in the next loop. */
ev_idle_start(EV_DEFAULT_ &handle->next_watcher);
ev_feed_event(EV_DEFAULT_ &handle->next_watcher, EV_IDLE);
assert(ev_is_pending(&handle->next_watcher));
return 0;
}
int uv_close(uv_handle_t* handle) {
switch (handle->type) {
case UV_TCP:
ev_io_stop(EV_DEFAULT_ &handle->write_watcher);
ev_io_stop(EV_DEFAULT_ &handle->read_watcher);
break;
case UV_PREPARE:
uv_prepare_stop(handle);
break;
case UV_CHECK:
uv_check_stop(handle);
break;
case UV_IDLE:
uv_idle_stop(handle);
break;
case UV_ASYNC:
ev_async_stop(EV_DEFAULT_ &handle->async_watcher);
ev_ref(EV_DEFAULT_UC);
break;
case UV_TIMER:
if (ev_is_active(&handle->timer_watcher)) {
ev_ref(EV_DEFAULT_UC);
}
ev_timer_stop(EV_DEFAULT_ &handle->timer_watcher);
break;
default:
assert(0);
return -1;
}
uv_flag_set(handle, UV_CLOSING);
/* This is used to call the on_close callback in the next loop. */
ev_idle_start(EV_DEFAULT_ &handle->next_watcher);
ev_feed_event(EV_DEFAULT_ &handle->next_watcher, EV_IDLE);
assert(ev_is_pending(&handle->next_watcher));
return 0;
}
int uv_shutdown(uv_req_t* req) {
uv_handle_t* handle = req->handle;
assert(handle->fd >= 0);
if (uv_flag_is_set(handle, UV_SHUT) ||
uv_flag_is_set(handle, UV_CLOSED) ||
uv_flag_is_set(handle, UV_CLOSING)) {
return -1;
}
handle->shutdown_req = req;
req->type = UV_SHUTDOWN;
uv_flag_set(handle, UV_SHUTTING);
ev_io_start(EV_DEFAULT_UC_ &handle->write_watcher);
return 0;
}
int uv_read_start(uv_handle_t* handle, uv_read_cb cb) {
/* The UV_READING flag is irrelevant of the state of the handle - it just
* expresses the desired state of the user.
*/
uv_flag_set(handle, UV_READING);
/* TODO: try to do the read inline? */
/* TODO: keep track of handle state. If we've gotten a EOF then we should
* not start the IO watcher.
*/
assert(handle->fd >= 0);
handle->read_cb = cb;
/* These should have been set by uv_tcp_init. */
assert(handle->read_watcher.data == handle);
assert(handle->read_watcher.cb == uv__tcp_io);
ev_io_start(EV_DEFAULT_UC_ &handle->read_watcher);
return 0;
}
int uv_shutdown(uv_req_t* req) {
uv_tcp_t* tcp = (uv_tcp_t*)req->handle;
assert(tcp->fd >= 0);
assert(tcp->type == UV_TCP);
if (uv_flag_is_set((uv_handle_t*)tcp, UV_SHUT) ||
uv_flag_is_set((uv_handle_t*)tcp, UV_CLOSED) ||
uv_flag_is_set((uv_handle_t*)tcp, UV_CLOSING)) {
return -1;
}
tcp->shutdown_req = req;
req->type = UV_SHUTDOWN;
uv_flag_set((uv_handle_t*)tcp, UV_SHUTTING);
ev_io_start(EV_DEFAULT_UC_ &tcp->write_watcher);
return 0;
}