BMutex.h

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/*******************************************************************************
 *  BMutex.h        BMutex Classes
 *  T.Barnaby,  BEAM Ltd,   1/11/02
 *  Copyright (c) 2022 All Right Reserved, Beam Ltd, https://www.beam.ltd.uk
 *  For license see LICENSE.txt at the root of the beamlib source tree.
 *******************************************************************************
 */
#ifndef BMUTEX_H
#define BMUTEX_H    1
 
#include <pthread.h>
 
class BMutex {
public:
    enum Type   { Normal, Recursive };
 
            BMutex(Type type =  Normal);
            BMutex(const BMutex& mutex);
            ~BMutex();
    
    int     lock();         
    int     timedLock(int timeoutUs);   
    int     unlock();       
    int     tryLock();      
    
    BMutex&     operator=(const BMutex& mutex);
private:
    pthread_mutex_t omutex;
};
 
class BMutexLock {
public:
            BMutexLock(BMutex& lock, int doLock = 0) : olock(lock)  { if(doLock) olock.lock();  }
            ~BMutexLock()               { olock.unlock();       }
    int     lock()                  { return olock.lock();      }
    int     unlock()                { return olock.unlock();    }
private:
    BMutex&     olock;
};
#endif