Mutex.h

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/*
 * Copyright 2017 Fraunhofer Institute for Manufacturing Engineering and Automation (IPA)
 *
 * 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 MUTEX_INCLUDEDEF_H
#define MUTEX_INCLUDEDEF_H
//-----------------------------------------------
#include <pthread.h>
 
const unsigned int INFINITE = 0;
 
 
class Mutex
{
private:
        pthread_mutex_t m_hMutex;
 
public:
        Mutex()
        {
                pthread_mutex_init(&m_hMutex, 0);
        }
 
        Mutex( std::string sName)
        {
// no named Mutexes for POSIX
                pthread_mutex_init(&m_hMutex, 0);
        }
 
        ~Mutex()
        {
                pthread_mutex_destroy(&m_hMutex);
        }
 
        bool lock( unsigned int uiTimeOut = INFINITE )
        {
                int ret;
 
                if (uiTimeOut == INFINITE)
                {
                        ret = pthread_mutex_lock(&m_hMutex);
                }
                else
                {
                        timespec abstime = { time(0) + uiTimeOut, 0 };
                        ret = pthread_mutex_timedlock(&m_hMutex, &abstime);
                }
 
                return ! ret;
        }
 
        void unlock()
        {
                pthread_mutex_unlock(&m_hMutex);
        }
};
//-----------------------------------------------
#endif