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