| // Copyright 2015 The Cobalt Authors. All Rights Reserved. |
| // |
| // 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. |
| |
| #include "starboard/common/mutex.h" |
| |
| #include <pthread.h> |
| |
| #include "starboard/shared/pthread/is_success.h" |
| #include "starboard/shared/pthread/types_internal.h" |
| #include "starboard/shared/starboard/lazy_initialization_internal.h" |
| |
| using starboard::shared::starboard::EnsureInitialized; |
| using starboard::shared::starboard::SetInitialized; |
| |
| SbMutexResult SbMutexAcquireTry(SbMutex* mutex) { |
| if (!mutex) { |
| return kSbMutexDestroyed; |
| } |
| |
| #if SB_API_VERSION >= 12 |
| if (!EnsureInitialized(&(SB_INTERNAL_MUTEX(mutex)->initialized_state))) { |
| *SB_PTHREAD_INTERNAL_MUTEX(mutex) = PTHREAD_MUTEX_INITIALIZER; |
| SetInitialized(&(SB_INTERNAL_MUTEX(mutex)->initialized_state)); |
| } |
| #endif |
| |
| int result = pthread_mutex_trylock(SB_PTHREAD_INTERNAL_MUTEX(mutex)); |
| if (IsSuccess(result)) { |
| return kSbMutexAcquired; |
| } |
| |
| return kSbMutexBusy; |
| } |