jack2/macosx/JackMachThread.h

/*
Copyright (C) 2001 Paul Davis
Copyright (C) 2004-2008 Grame

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software 
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

*/

/*
	Copyright: 	© Copyright 2002 Apple Computer, Inc. All rights reserved.

	Disclaimer:	IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.
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#ifndef __JackMachThread__
#define __JackMachThread__

#include "JackPosixThread.h"
#import <CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h>

#include <mach/thread_policy.h>
#include <mach/thread_act.h>
#include <CoreAudio/HostTime.h>

#define THREAD_SET_PRIORITY         0
#define THREAD_SCHEDULED_PRIORITY   1

namespace Jack
{

/*!
\brief Darwin threads. Real-time threads are actually "time constraint" threads.
*/

class SERVER_EXPORT JackMachThread : public JackPosixThread
{

    private:

        UInt64 fPeriod;
        UInt64 fComputation;
        UInt64 fConstraint;

        static UInt32 GetThreadSetPriority(pthread_t thread);
        static UInt32 GetThreadScheduledPriority(pthread_t thread);
        static UInt32 GetThreadPriority(pthread_t thread, int inWhichPriority);

    public:

        JackMachThread(JackRunnableInterface* runnable, UInt64 period, UInt64 computation, UInt64 constraint)
                : JackPosixThread(runnable), fPeriod(period), fComputation(computation), fConstraint(constraint)
        {}

        JackMachThread(JackRunnableInterface* runnable, int cancellation = PTHREAD_CANCEL_ASYNCHRONOUS)
                : JackPosixThread(runnable, cancellation), fPeriod(0), fComputation(0), fConstraint(0)
        {}

        int Kill();

        int AcquireRealTime();
        int AcquireRealTime(int priority);
        int DropRealTime();
        void SetParams(UInt64 period, UInt64 computation, UInt64 constraint);
        static int GetParams(UInt64* period, UInt64* computation, UInt64* constraint);
        static int SetThreadToPriority(pthread_t thread, UInt32 inPriority, Boolean inIsFixed, UInt64 period, UInt64 computation, UInt64 constraint);

        static int AcquireRealTimeImp(pthread_t thread, UInt64 period, UInt64 computation, UInt64 constraint);
        static int DropRealTimeImp(pthread_t thread);
};

} // end of namespace

#endif