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RocksDB for Erlang

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rocksdb c_src mutex.h
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c_src/mutex.h 

// -------------------------------------------------------------------

//

// eleveldb: Erlang Wrapper for LevelDB (http://code.google.com/p/leveldb/)

//

// Copyright (c) 2011-2013 Basho Technologies, Inc. All Rights Reserved.

//

// This file is provided to you 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 INCL_MUTEX_H

#define INCL_MUTEX_H



#include <pthread.h>



namespace erocksdb {





/**

 * Autoinitializing mutex object

 */

class Mutex

{

protected:

    pthread_mutex_t m_Mutex;



public:

    Mutex() {pthread_mutex_init(&m_Mutex, NULL);};



    ~Mutex() {pthread_mutex_destroy(&m_Mutex);};



    pthread_mutex_t & get() {return(m_Mutex);};



//    pthread_mutex_t * operator() {return(&m_Mutex);};



    void Lock() {pthread_mutex_lock(&m_Mutex);};



    void Unlock() {pthread_mutex_unlock(&m_Mutex);};



private:

    Mutex(const Mutex & rhs);             // no copy

    Mutex & operator=(const Mutex & rhs); // no assignment



};  // class Mutex





/**

 * Automatic lock and unlock of mutex

 */

class MutexLock

{

protected:



    Mutex & m_MutexObject;



public:



    explicit MutexLock(Mutex & MutexObject)

        : m_MutexObject(MutexObject)

    {m_MutexObject.Lock();};



    ~MutexLock() {m_MutexObject.Unlock();};



private:



    MutexLock();                                  // no default constructor

    MutexLock(const MutexLock & rhs);             // no copy constructor

    MutexLock & operator=(const MutexLock & rhs); // no assignment constructor

};  // class MutexLock



} // namespace erocksdb





#endif  // INCL_MUTEX_H