jack2/common/JackProcessSync.h

/*
Copyright (C) 2004-2006 Grame

This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __JackProcessSync__
#define __JackProcessSync__

#include "JackSyncInterface.h"
#include "JackSynchro.h"
#include <pthread.h>
#include <sys/time.h>
#include <unistd.h>

namespace Jack
{

/*!
\brief  A synchronization primitive built using a condition variable.
*/

class JackProcessSync : public JackSyncInterface
{

    private:

        pthread_mutex_t fLock;  // Mutex
        pthread_cond_t fCond;   // Condition variable

    public:

        JackProcessSync(): JackSyncInterface()
        {
            pthread_mutex_init(&fLock, NULL);
            pthread_cond_init(&fCond, NULL);
        }
        virtual ~JackProcessSync()
        {
            pthread_mutex_destroy(&fLock);
            pthread_cond_destroy(&fCond);
        }

        bool Allocate(const char* name)
        {
            return true;
        }

        bool Connect(const char* name)
        {
            return true;
        }

        void Destroy()
        {}

        bool TimedWait(long usec);
  
        void Wait();
        
        void Signal()
        {
            pthread_mutex_lock(&fLock);
            pthread_cond_signal(&fCond);
            pthread_mutex_unlock(&fLock);
        }
     
        void SignalAll()
        {
            //pthread_mutex_lock(&fLock);
            pthread_cond_broadcast(&fCond);
            //pthread_mutex_unlock(&fLock);
        }

};

/*!
\brief  A synchronization primitive built using an inter-process synchronization object.
*/

class JackInterProcessSync : public JackSyncInterface
{

    private:

        JackSynchro* fSynchro;

    public:

        JackInterProcessSync(JackSynchro* synchro): fSynchro(synchro)
        {}
        virtual ~JackInterProcessSync()
        {
            delete fSynchro;
        }

        bool Allocate(const char* name)
        {
            return fSynchro->Allocate(name, "", 0);
        }

        void Destroy()
        {
            fSynchro->Destroy();
        }

        bool Connect(const char* name)
        {
            return fSynchro->Connect(name, "");
        }

        bool TimedWait(long usec);

        void Wait()
        {
            fSynchro->Wait();
        }

        void SignalAll()
        {
            fSynchro->SignalAll();
        }
};


} // end of namespace

#endif