root/jack2/branches/libjacknet/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.
        ("Apple") in consideration of your agreement to the following terms, and your
        use, installation, modification or redistribution of this Apple software
        constitutes acceptance of these terms.  If you do not agree with these terms,
        please do not use, install, modify or redistribute this Apple software.

        In consideration of your agreement to abide by the following terms, and subject
        to these terms, Apple grants you a personal, non-exclusive license, under Apple
        copyrights in this original Apple software (the "Apple Software"), to use,
        reproduce, modify and redistribute the Apple Software, with or without
        modifications, in source and/or binary forms; provided that if you redistribute
        the Apple Software in its entirety and without modifications, you must retain
        this notice and the following text and disclaimers in all such redistributions of
        the Apple Software.  Neither the name, trademarks, service marks or logos of
        Apple Computer, Inc. may be used to endorse or promote products derived from the
        Apple Software without specific prior written permission from Apple.  Except as
        expressly stated in this notice, no other rights or licenses, express or implied,
        are granted by Apple herein, including but not limited to any patent rights that
        may be infringed by your derivative works or by other works in which the Apple
        Software may be incorporated.

        The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO
        WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
        WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
        COMBINATION WITH YOUR PRODUCTS.

        IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
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        GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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*/


#ifndef __JackMachThread__
#define __JackMachThread__

#include <TargetConditionals.h>

#ifdef MY_TARGET_OS_IPHONE
typedef unsigned char Boolean;
#endif


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

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

#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();                  // Used when called from another thread
        int AcquireSelfRealTime();              // Used when called from thread itself
        
        int AcquireRealTime(int priority);      // Used when called from another thread
        int AcquireSelfRealTime(int priority);  // Used when called from thread itself
        
        int DropRealTime();                     // Used when called from another thread
        int DropSelfRealTime();                 // Used when called from thread itself
        
        void SetParams(UInt64 period, UInt64 computation, UInt64 constraint);
        static int GetParams(pthread_t thread, 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 AcquireRealTimeImp(pthread_t thread, int priority, UInt64 period, UInt64 computation, UInt64 constraint)
                { 
            return JackMachThread::AcquireRealTimeImp(thread, period, computation, constraint); 
        }
        static int DropRealTimeImp(pthread_t thread);
};

} // end of namespace

#endif