| // Copyright 2015 Google Inc. 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/condition_variable.h" |
| |
| #include <pthread.h> |
| |
| #include "starboard/shared/pthread/is_success.h" |
| #include "starboard/shared/starboard/lazy_initialization_internal.h" |
| |
| using starboard::shared::starboard::SetInitialized; |
| |
| namespace { |
| struct ConditionVariableAttributes { |
| public: |
| ConditionVariableAttributes() { |
| valid_ = IsSuccess(pthread_condattr_init(&attributes_)); |
| } |
| ~ConditionVariableAttributes() { |
| if (valid_) { |
| SB_CHECK(IsSuccess(pthread_condattr_destroy(&attributes_))); |
| } |
| } |
| |
| bool valid() const { return valid_; } |
| pthread_condattr_t* attributes() { return &attributes_; } |
| |
| private: |
| bool valid_; |
| pthread_condattr_t attributes_; |
| }; |
| } // namespace |
| |
| bool SbConditionVariableCreate(SbConditionVariable* out_condition, |
| SbMutex* /*opt_mutex*/) { |
| if (!out_condition) { |
| return false; |
| } |
| |
| ConditionVariableAttributes attributes; |
| if (!attributes.valid()) { |
| SB_DLOG(ERROR) << "Failed to call pthread_condattr_init()."; |
| return false; |
| } |
| |
| #if !SB_HAS_QUIRK(NO_CONDATTR_SETCLOCK_SUPPORT) |
| // Always use CLOCK_MONOTONIC so that SbConditionVariableWaitTimed() will |
| // not be based off of the system clock (which can lead to erroneous |
| // behavior if the system clock is changed while a process is running). |
| if (!IsSuccess(pthread_condattr_setclock( |
| attributes.attributes(), CLOCK_MONOTONIC))) { |
| SB_DLOG(ERROR) << "Failed to call pthread_condattr_setclock()."; |
| return false; |
| } |
| #endif // !SB_HAS_QUIRK(NO_CONDATTR_SETCLOCK_SUPPORT) |
| |
| bool status = IsSuccess(pthread_cond_init( |
| &out_condition->condition, attributes.attributes())); |
| |
| // We mark that we are initialized regardless of whether initialization |
| // was successful or not. |
| SetInitialized(&out_condition->initialized_state); |
| |
| if (!status) { |
| SB_DLOG(ERROR) << "Failed to call pthread_cond_init()."; |
| } |
| |
| return status; |
| } |