| /****************************************************************************** |
| * |
| * Copyright (C) 2014 Google, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| #pragma once |
| |
| #include "base.h" |
| |
| #include <semaphore.h> |
| |
| #define WAIT(callback) \ |
| do { \ |
| sem_t *semaphore = callbacks_get_semaphore(#callback); \ |
| sem_wait(semaphore); \ |
| } while (0) |
| |
| #define CALL_AND_WAIT(expression, callback) \ |
| do { \ |
| sem_t *semaphore = callbacks_get_semaphore(#callback); \ |
| while (!sem_trywait(semaphore)); \ |
| expression; \ |
| sem_wait(semaphore); \ |
| } while(0) |
| |
| // To be called from every exit point of the callback. This macro |
| // takes 0 or 1 arguments, the return value of the callback. |
| #define CALLBACK_RET(...) do { \ |
| sem_t *semaphore = callbacks_get_semaphore(__func__); \ |
| sem_post(semaphore); \ |
| return __VA_ARGS__; \ |
| } while (0) |
| |
| void callbacks_init(); |
| void callbacks_cleanup(); |
| |
| bt_callbacks_t *callbacks_get_adapter_struct(); |
| btpan_callbacks_t *callbacks_get_pan_struct(); |
| sem_t *callbacks_get_semaphore(const char *name); |