ibrcommon/ibrcommon/thread/RWMutex.cpp

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/*
 * RWMutex.cpp
 *
 *  Created on: 27.03.2012
 *      Author: morgenro
 */

#include "ibrcommon/thread/RWMutex.h"
#include <errno.h>

namespace ibrcommon
{
        RWMutex::RWMutex()
        {
                pthread_rwlock_init(&_rwlock, NULL);
        }

        RWMutex::~RWMutex()
        {
                pthread_rwlock_destroy(&_rwlock);
        }

        void RWMutex::trylock(LockState state) throw (MutexException)
        {
                int ret = 0;

                switch (state) {
                case LOCK_READONLY:
                        ret = pthread_rwlock_tryrdlock(&_rwlock);
                        break;

                case LOCK_READWRITE:
                        ret = pthread_rwlock_trywrlock(&_rwlock);
                        break;
                }

                switch (ret)
                {
                case 0:
                        break;

                case EBUSY:
                        throw MutexException("The mutex could not be acquired because it was already locked.");
                        break;
                }
        }

        void RWMutex::enter(LockState state) throw (MutexException)
        {
                switch (state) {
                case LOCK_READONLY:
                        pthread_rwlock_rdlock(&_rwlock);
                        break;

                case LOCK_READWRITE:
                        pthread_rwlock_wrlock(&_rwlock);
                        break;
                }
        }

        void RWMutex::leave() throw (MutexException)
        {
                pthread_rwlock_unlock(&_rwlock);
        }
} /* namespace ibrcommon */