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/BdbTransfer/BdbPTMutex.h

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//------------------------------------------------------------------------------
// File and Version Information:
//      $Id: BdbPTMutex.h,v 1.3 1999/07/14 04:14:45 svarovsk Exp $
//
// Description:
//      C++ interface library to POSIX threads
//      this is pure interface to system calls
//      all functions are inline
//
//      this file deals with mutexes
//
// Environment:
//      Software developed for the BaBar Detector at the SLAC B-Factory
//
// Author:
//      Gennadi S. Svarovski (svarovsk@slac.stanford.edu)
//          original author
//
// Copyright Information:
//      Copyright (C) 1999      Stanford Linear Accelerator Center
//
//------------------------------------------------------------------------------

#ifndef _BDBPTMUTEX_H_
#define _BDBPTMUTEX_H_

#include <pthread.h>

#include "BdbTransfer/BdbPTMutexAttr.h"

class BdbPTCond;

class BdbPTMutex {
    private:
        pthread_mutex_t mutex;
        
    public:
        // default constructor
        inline BdbPTMutex();
        inline BdbPTMutex( const BdbPTMutexAttr &Attr );
        // destructor
        inline ~BdbPTMutex();

        // access methods
        inline int lock    ( void );
        inline int trylock ( void );
        inline int unlock  ( void );

        friend class BdbPTCond;

    private:
        // need to prohibit copying of any kind
        inline BdbPTMutex( BdbPTMutex& c ) {};
        inline BdbPTMutex& operator =(BdbPTMutex& c ) { return *this; };
};
        
// default constructor
inline BdbPTMutex::BdbPTMutex() {
    pthread_mutex_init( &mutex, NULL );
}

inline BdbPTMutex::BdbPTMutex( const BdbPTMutexAttr &Attr ) {
    pthread_mutex_init( &mutex, &Attr.attr );
}

// destructor
inline BdbPTMutex::~BdbPTMutex() {
    pthread_mutex_destroy( &mutex );
}

// access methods
inline int BdbPTMutex::lock    ( void ) {
    return pthread_mutex_lock( &mutex );
}

inline int BdbPTMutex::trylock ( void ) {
    return pthread_mutex_trylock( &mutex );
}

inline int BdbPTMutex::unlock  ( void ) {
    return pthread_mutex_unlock( &mutex );
}

#endif // _BDBPTMUTEX_H_

 

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