| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #ifndef _CM4F_TRYLOCK_H_ |
| #define _CM4F_TRYLOCK_H_ |
| |
| #include <stdint.h> |
| #include <stdbool.h> |
| |
| #ifdef PLATFORM_HAS_OWN_TRYLOCK |
| #include <plat/trylock.h> |
| #else |
| |
| struct TryLock { |
| volatile uint8_t lock; |
| }; |
| |
| #define TRYLOCK_DECL_STATIC(name) struct TryLock name |
| #define TRYLOCK_INIT_STATIC() {0} |
| |
| void trylockInit(struct TryLock *lock); |
| void trylockRelease(struct TryLock *lock); |
| bool trylockTryTake(struct TryLock *lock); //true if we took it |
| |
| /* DON'T YOU EVER DARE TO TRY AND IMPLEMENT A BLOCKING "TAKE" ON THIS TYPE OF LOCK! -dmitrygr@ */ |
| |
| #endif //PLATFORM_HAS_OWN_TRYLOCK |
| |
| #endif |
| |
