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86 lines
2.5 KiB
86 lines
2.5 KiB
7 months ago
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/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Encapsulate a condition variable for thread synchronization.
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*/
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#pragma once
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#include <pthread.h>
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#include "Mutex.h"
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class CondVar {
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public:
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/*******************************************************************************
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**
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** Function: CondVar
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**
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** Description: Initialize member variables.
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**
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** Returns: None.
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**
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*******************************************************************************/
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CondVar();
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/*******************************************************************************
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**
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** Function: ~CondVar
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**
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** Description: Cleanup all resources.
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**
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** Returns: None.
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**
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*******************************************************************************/
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~CondVar();
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/*******************************************************************************
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**
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** Function: wait
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**
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** Description: Block the caller and wait for a condition.
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**
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** Returns: None.
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**
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*******************************************************************************/
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void wait(Mutex& mutex);
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/*******************************************************************************
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**
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** Function: wait
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**
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** Description: Block the caller and wait for a condition.
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** millisec: Timeout in milliseconds.
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**
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** Returns: True if wait is successful; false if timeout occurs.
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**
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*******************************************************************************/
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bool wait(Mutex& mutex, long millisec);
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/*******************************************************************************
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**
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** Function: notifyOne
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**
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** Description: Unblock the waiting thread.
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**
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** Returns: None.
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**
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*******************************************************************************/
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void notifyOne();
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private:
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pthread_cond_t mCondition;
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};
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