SynchronizedSharedMemory.h

// $Id: SynchronizedSharedMemory.h 21 2010-09-05 04:18:17Z cschwarz1 $

#ifndef BASE_SYNCHRONIZEDSHAREDMEMORY_H
#define BASE_SYNCHRONIZEDSHAREDMEMORY_H

#ifndef _WIN32
    #include <pthread.h>
#endif
#include "SharedMemory.h"

namespace base {

    class PPBASE_EXPORT SynchronizedSharedMemory: public SharedMemory {
    public:
        enum waitE {
            waitNone = 0,   
            waitEmpty = 1,  
            waitFull = 2    
        };

        SynchronizedSharedMemory();

        ~SynchronizedSharedMemory();

        void close();


        void destroy();


        void lock(waitE wait = waitNone);


        void open(const char *name, unsigned size, int flags = 0);


        void unlock(waitE wait = waitNone);

    private:
    #ifdef _WIN32
        HANDLE          _evente;  
        HANDLE          _eventf;  
        HANDLE          _mutex;   
    #else
        pthread_mutex_t _mutex;   
        int             _semid;   
    #endif
    };
}

#endif