#ifndef POSIXSHMEM_H
#define POSIXSHMEM_H

#include <qsharedmemory.h>
#include <qsystemsemaphore.h>

#include "ShMemBase.h"

/*
union semun{
    int val ;
    struct semid_ds * buf;
    unsigned short array[1];
};
*/

class PosixShMem
        : public ShMemBase
{
public:
    PosixShMem(const char * name, int size);
    virtual ~PosixShMem();

    virtual void *read();
    virtual void write(void *data, int size, unsigned long offset = 0);
    virtual bool wait(unsigned long timeout = 0);
    virtual void lockMemory();
    virtual void unlockMemory();

protected:

private:
    //  int shMemHandle_;
    //  int semaphore_id;
    //  semun sem_arg_ctl;
    QSystemSemaphore * event_;
    QSharedMemory * memory_;
};

#endif // POSIXSHMEM_H