| /* 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 <assert.h> |
| |
| #include "uv.h" |
| #include "internal.h" |
| #include "atomicops-inl.h" |
| #include "handle-inl.h" |
| #include "req-inl.h" |
| |
| |
| void uv_async_endgame(uv_loop_t* loop, uv_async_t* handle) { |
| if (handle->flags & UV__HANDLE_CLOSING && |
| !handle->async_sent) { |
| assert(!(handle->flags & UV_HANDLE_CLOSED)); |
| uv__handle_close(handle); |
| } |
| } |
| |
| |
| int uv_async_init(uv_loop_t* loop, uv_async_t* handle, uv_async_cb async_cb) { |
| uv_req_t* req; |
| |
| uv__handle_init(loop, (uv_handle_t*) handle, UV_ASYNC); |
| handle->async_sent = 0; |
| handle->async_cb = async_cb; |
| |
| req = &handle->async_req; |
| uv_req_init(loop, req); |
| req->type = UV_WAKEUP; |
| req->data = handle; |
| |
| uv__handle_start(handle); |
| |
| return 0; |
| } |
| |
| |
| 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); |
| } |
| |
| |
| int uv_async_send(uv_async_t* handle) { |
| uv_loop_t* loop = handle->loop; |
| |
| if (handle->type != UV_ASYNC) { |
| /* Can't set errno because that's not thread-safe. */ |
| return -1; |
| } |
| |
| /* The user should make sure never to call uv_async_send to a closing */ |
| /* or closed handle. */ |
| assert(!(handle->flags & UV__HANDLE_CLOSING)); |
| |
| if (!uv__atomic_exchange_set(&handle->async_sent)) { |
| POST_COMPLETION_FOR_REQ(loop, &handle->async_req); |
| } |
| |
| return 0; |
| } |
| |
| |
| void uv_process_async_wakeup_req(uv_loop_t* loop, uv_async_t* handle, |
| uv_req_t* req) { |
| assert(handle->type == UV_ASYNC); |
| assert(req->type == UV_WAKEUP); |
| |
| handle->async_sent = 0; |
| |
| if (!(handle->flags & UV__HANDLE_CLOSING)) { |
| handle->async_cb((uv_async_t*) handle, 0); |
| } else { |
| uv_want_endgame(loop, (uv_handle_t*)handle); |
| } |
| } |