mirror of
https://github.com/kyleneideck/BackgroundMusic
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191 lines
7.3 KiB
C++
191 lines
7.3 KiB
C++
/*
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File: CAPThread.h
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Abstract: Part of CoreAudio Utility Classes
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Version: 1.1
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
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terms, and your use, installation, modification or redistribution of
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this Apple software constitutes acceptance of these terms. If you do
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not agree with these terms, please do not use, install, modify or
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redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and
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subject to these terms, Apple grants you a personal, non-exclusive
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license, under Apple's copyrights in this original Apple software (the
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"Apple Software"), to use, reproduce, modify and redistribute the Apple
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Software, with or without modifications, in source and/or binary forms;
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provided that if you redistribute the Apple Software in its entirety and
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without modifications, you must retain this notice and the following
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text and disclaimers in all such redistributions of the Apple Software.
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Neither the name, trademarks, service marks or logos of Apple Inc. may
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be used to endorse or promote products derived from the Apple Software
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without specific prior written permission from Apple. Except as
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expressly stated in this notice, no other rights or licenses, express or
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implied, are granted by Apple herein, including but not limited to any
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patent rights that may be infringed by your derivative works or by other
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works in which the Apple Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2014 Apple Inc. All Rights Reserved.
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*/
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#if !defined(__CAPThread_h__)
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#define __CAPThread_h__
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//==================================================================================================
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// Includes
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//==================================================================================================
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// System Includes
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#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
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#include <CoreFoundation/CFBase.h>
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#else
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#include <CFBase.h>
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#endif
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#if TARGET_OS_MAC
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#include <pthread.h>
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#include <unistd.h>
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#elif TARGET_OS_WIN32
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#include <windows.h>
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#else
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#error Unsupported operating system
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#endif
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//==================================================================================================
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// CAPThread
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//
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// This class wraps a pthread and a Win32 thread.
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// caution: long-running fixed priority threads can make the system unresponsive
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//==================================================================================================
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class CAPThread
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{
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// Types
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public:
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typedef void* (*ThreadRoutine)(void* inParameter);
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// Constants
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public:
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enum
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{
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#if TARGET_OS_MAC
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kMinThreadPriority = 1,
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kMaxThreadPriority = 63,
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kDefaultThreadPriority = 31,
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kMaxThreadNameLength = 64
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#elif TARGET_OS_WIN32
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kMinThreadPriority = 1,
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kMaxThreadPriority = 31,
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kDefaultThreadPriority = THREAD_PRIORITY_NORMAL,
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kMaxThreadNameLength = 256
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#endif
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};
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// Construction/Destruction
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public:
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CAPThread(ThreadRoutine inThreadRoutine, void* inParameter, UInt32 inPriority = kDefaultThreadPriority, bool inFixedPriority=false, bool inAutoDelete=false, const char* inThreadName = NULL);
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CAPThread(ThreadRoutine inThreadRoutine, void* inParameter, UInt32 inPeriod, UInt32 inComputation, UInt32 inConstraint, bool inIsPreemptible, bool inAutoDelete=false, const char* inThreadName = NULL);
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virtual ~CAPThread();
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// Properties
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public:
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#if TARGET_OS_MAC
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typedef pthread_t NativeThread;
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NativeThread GetNativeThread() { return mPThread; }
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static NativeThread GetCurrentThread() { return pthread_self(); }
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static bool IsNativeThreadsEqual(NativeThread a, NativeThread b) { return (a==b); }
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bool operator==(NativeThread b) { return pthread_equal(mPThread,b); }
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pthread_t GetPThread() const { return mPThread; }
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bool IsCurrentThread() const { return (0 != mPThread) && (pthread_self() == mPThread); }
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bool IsRunning() const { return 0 != mPThread; }
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static UInt32 getScheduledPriority(pthread_t inThread, int inPriorityKind);
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#elif TARGET_OS_WIN32
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typedef unsigned long NativeThread;
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NativeThread GetNativeThread() { return mThreadID; }
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static NativeThread GetCurrentThread() { return GetCurrentThreadId(); }
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static bool IsNativeThreadsEqual(NativeThread a, NativeThread b) { return (a==b); }
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bool operator ==(NativeThread b) { return (mThreadID==b); }
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HANDLE GetThreadHandle() const { return mThreadHandle; }
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UInt32 GetThreadID() const { return mThreadID; }
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bool IsCurrentThread() const { return (0 != mThreadID) && (GetCurrentThreadId() == mThreadID); }
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bool IsRunning() const { return 0 != mThreadID; }
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#endif
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bool IsTimeShareThread() const { return !mTimeConstraintSet; }
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bool IsTimeConstraintThread() const { return mTimeConstraintSet; }
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UInt32 GetPriority() const { return mPriority; }
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UInt32 GetScheduledPriority();
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static UInt32 GetScheduledPriority(NativeThread thread);
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void SetPriority(UInt32 inPriority, bool inFixedPriority=false);
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static void SetPriority(NativeThread inThread, UInt32 inPriority, bool inFixedPriority = false);
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void GetTimeConstraints(UInt32& outPeriod, UInt32& outComputation, UInt32& outConstraint, bool& outIsPreemptible) const { outPeriod = mPeriod; outComputation = mComputation; outConstraint = mConstraint; outIsPreemptible = mIsPreemptible; }
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void SetTimeConstraints(UInt32 inPeriod, UInt32 inComputation, UInt32 inConstraint, bool inIsPreemptible);
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void ClearTimeConstraints() { SetPriority(mPriority); }
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bool WillAutoDelete() const { return mAutoDelete; }
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void SetAutoDelete(bool b) { mAutoDelete = b; }
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void SetName(const char* inThreadName);
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#if CoreAudio_Debug
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void DebugPriority(const char *label);
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#endif
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// Actions
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public:
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virtual void Start();
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// Implementation
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protected:
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#if TARGET_OS_MAC
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static void* Entry(CAPThread* inCAPThread);
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#elif TARGET_OS_WIN32
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static UInt32 WINAPI Entry(CAPThread* inCAPThread);
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#endif
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#if TARGET_OS_MAC
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pthread_t mPThread;
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UInt32 mSpawningThreadPriority;
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#elif TARGET_OS_WIN32
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HANDLE mThreadHandle;
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unsigned long mThreadID;
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#endif
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ThreadRoutine mThreadRoutine;
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void* mThreadParameter;
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char mThreadName[kMaxThreadNameLength];
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UInt32 mPriority;
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UInt32 mPeriod;
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UInt32 mComputation;
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UInt32 mConstraint;
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bool mIsPreemptible;
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bool mTimeConstraintSet;
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bool mFixedPriority;
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bool mAutoDelete; // delete self when thread terminates
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};
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#endif
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