jack2/macosx/JackMachSemaphore.h

/*
Copyright (C) 2004-2008 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 __JackMacSemaphore__
#define __JackMacSemaphore__

#include "JackSynchro.h"
#include <mach/mach.h>
#include <mach/mach_types.h>
#include <mach/message.h>
#include <mach/mach_error.h>
#include <servers/bootstrap.h>
#include <mach/semaphore.h>

namespace Jack
{

/*!
\brief Inter process synchronization using using Mach semaphore.
*/

class JackMachSemaphore : public JackSynchro
{

    private:

        semaphore_t fSemaphore;
        static mach_port_t fBootPort;

    protected:

        void BuildName(const char* name, const char* server_name, char* res);

    public:

        JackMachSemaphore(): JackSynchro(), fSemaphore(0)
        {}
        virtual ~JackMachSemaphore()
        {}

        bool Signal();
        bool SignalAll();
        bool Wait();
        bool TimedWait(long usec);

        bool Allocate(const char* name, const char* server_name, int value);
        bool Connect(const char* name, const char* server_name);
        bool ConnectInput(const char* name, const char* server_name);
        bool ConnectOutput(const char* name, const char* server_name);
        bool Disconnect();
        void Destroy();
};


} // end of namespace


#endif