Cider Isn't Darwin Emulation, Really
Something went wrong. Try again.
12 kB · 335 lines
C++
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336/* Copyright: � Copyright 2005 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�s 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 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*//*============================================================================= CAPThread.cp
=============================================================================*/
//=============================================================================// Includes//=============================================================================
// Self Include#include "CAPThread.h"
// PublicUtility Includes#include "CADebugMacros.h"#include "CAException.h"
// System Includes#if TARGET_OS_MAC #include <mach/mach.h>#endif
// Standard Library Includes#include <stdio.h>
//==================================================================================================// CAPThread//==================================================================================================
// returns the thread's priority as it was last set by the API#define CAPTHREAD_SET_PRIORITY 0// returns the thread's priority as it was last scheduled by the Kernel#define CAPTHREAD_SCHEDULED_PRIORITY 1
CAPThread::CAPThread(ThreadRoutine inThreadRoutine, void* inParameter, UInt32 inPriority, bool inFixedPriority):#if TARGET_OS_MAC mPThread(0), mSpawningThreadPriority(getScheduledPriority(pthread_self(), CAPTHREAD_SET_PRIORITY)),#elif TARGET_OS_WIN32 mThreadHandle(NULL), mThreadID(0),#endif mThreadRoutine(inThreadRoutine), mThreadParameter(inParameter), mPriority(inPriority), mPeriod(0), mComputation(0), mConstraint(0), mIsPreemptible(true), mTimeConstraintSet(false), mFixedPriority(inFixedPriority){}
CAPThread::CAPThread(ThreadRoutine inThreadRoutine, void* inParameter, UInt32 inPeriod, UInt32 inComputation, UInt32 inConstraint, bool inIsPreemptible):#if TARGET_OS_MAC mPThread(0), mSpawningThreadPriority(getScheduledPriority(pthread_self(), CAPTHREAD_SET_PRIORITY)),#elif TARGET_OS_WIN32 mThreadHandle(NULL), mThreadID(0),#endif mThreadRoutine(inThreadRoutine), mThreadParameter(inParameter), mPriority(kDefaultThreadPriority), mPeriod(inPeriod), mComputation(inComputation), mConstraint(inConstraint), mIsPreemptible(inIsPreemptible), mTimeConstraintSet(true), mFixedPriority(false){}
CAPThread::~CAPThread(){}
UInt32 CAPThread::GetScheduledPriority(){#if TARGET_OS_MAC return CAPThread::getScheduledPriority( mPThread, CAPTHREAD_SCHEDULED_PRIORITY );#elif TARGET_OS_WIN32 UInt32 theAnswer = 0; if(mThreadHandle != NULL) { theAnswer = GetThreadPriority(mThreadHandle); } return theAnswer;#endif}
void CAPThread::SetPriority(UInt32 inPriority, bool inFixedPriority){ mPriority = inPriority; mTimeConstraintSet = false; mFixedPriority = inFixedPriority;#if TARGET_OS_MAC if(mPThread != 0) { if (mFixedPriority) { thread_extended_policy_data_t theFixedPolicy; theFixedPolicy.timeshare = false; // set to true for a non-fixed thread AssertNoError(thread_policy_set(pthread_mach_thread_np(mPThread), THREAD_EXTENDED_POLICY, (thread_policy_t)&theFixedPolicy, THREAD_EXTENDED_POLICY_COUNT), "CAPThread::SetPriority: failed to set the fixed-priority policy"); } // We keep a reference to the spawning thread's priority around (initialized in the constructor), // and set the importance of the child thread relative to the spawning thread's priority. thread_precedence_policy_data_t thePrecedencePolicy; thePrecedencePolicy.importance = mPriority - mSpawningThreadPriority; AssertNoError(thread_policy_set(pthread_mach_thread_np(mPThread), THREAD_PRECEDENCE_POLICY, (thread_policy_t)&thePrecedencePolicy, THREAD_PRECEDENCE_POLICY_COUNT), "CAPThread::SetPriority: failed to set the precedence policy"); } #elif TARGET_OS_WIN32 if(mThreadHandle != NULL) { SetThreadPriority(mThreadHandle, mPriority); }#endif}
void CAPThread::SetTimeConstraints(UInt32 inPeriod, UInt32 inComputation, UInt32 inConstraint, bool inIsPreemptible){ mPeriod = inPeriod; mComputation = inComputation; mConstraint = inConstraint; mIsPreemptible = inIsPreemptible; mTimeConstraintSet = true;#if TARGET_OS_MAC if(mPThread != 0) { thread_time_constraint_policy_data_t thePolicy; thePolicy.period = mPeriod; thePolicy.computation = mComputation; thePolicy.constraint = mConstraint; thePolicy.preemptible = mIsPreemptible; AssertNoError(thread_policy_set(pthread_mach_thread_np(mPThread), THREAD_TIME_CONSTRAINT_POLICY, (thread_policy_t)&thePolicy, THREAD_TIME_CONSTRAINT_POLICY_COUNT), "CAPThread::SetTimeConstraints: thread_policy_set failed"); }#elif TARGET_OS_WIN32 if(mThreadHandle != NULL) { SetThreadPriority(mThreadHandle, THREAD_PRIORITY_TIME_CRITICAL); }#endif}
void CAPThread::Start(){#if TARGET_OS_MAC if(mPThread == 0) { OSStatus theResult; pthread_attr_t theThreadAttributes; theResult = pthread_attr_init(&theThreadAttributes); ThrowIf(theResult != 0, CAException(theResult), "CAPThread::Start: Thread attributes could not be created."); theResult = pthread_attr_setdetachstate(&theThreadAttributes, PTHREAD_CREATE_DETACHED); ThrowIf(theResult != 0, CAException(theResult), "CAPThread::Start: A thread could not be created in the detached state."); theResult = pthread_create(&mPThread, &theThreadAttributes, (ThreadRoutine)CAPThread::Entry, this); ThrowIf(theResult != 0 || !mPThread, CAException(theResult), "CAPThread::Start: Could not create a thread."); pthread_attr_destroy(&theThreadAttributes); }#elif TARGET_OS_WIN32 if(mThreadID == 0) { // clean up the existing thread handle if(mThreadHandle != NULL) { CloseHandle(mThreadHandle); mThreadHandle = NULL; } // create a new thread mThreadHandle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)Entry, this, 0, &mThreadID); ThrowIf(mThreadHandle == NULL, CAException(GetLastError()), "CAPThread::Start: Could not create a thread."); }#endif}
#if TARGET_OS_MAC
void* CAPThread::Entry(CAPThread* inCAPThread){ void* theAnswer = NULL;
try { if(inCAPThread->mTimeConstraintSet) { inCAPThread->SetTimeConstraints(inCAPThread->mPeriod, inCAPThread->mComputation, inCAPThread->mConstraint, inCAPThread->mIsPreemptible); } else { inCAPThread->SetPriority(inCAPThread->mPriority, inCAPThread->mFixedPriority); }
if(inCAPThread->mThreadRoutine != NULL) { theAnswer = inCAPThread->mThreadRoutine(inCAPThread->mThreadParameter); } } catch (...) { // what should be done here? } inCAPThread->mPThread = 0; return theAnswer;}
UInt32 CAPThread::getScheduledPriority(pthread_t inThread, int inPriorityKind){ thread_basic_info_data_t threadInfo; policy_info_data_t thePolicyInfo; unsigned int count;
if (inThread == NULL) return 0; // get basic info count = THREAD_BASIC_INFO_COUNT; thread_info (pthread_mach_thread_np (inThread), THREAD_BASIC_INFO, (thread_info_t)&threadInfo, &count); switch (threadInfo.policy) { case POLICY_TIMESHARE: count = POLICY_TIMESHARE_INFO_COUNT; thread_info(pthread_mach_thread_np (inThread), THREAD_SCHED_TIMESHARE_INFO, (thread_info_t)&(thePolicyInfo.ts), &count); if (inPriorityKind == CAPTHREAD_SCHEDULED_PRIORITY) { return thePolicyInfo.ts.cur_priority; } return thePolicyInfo.ts.base_priority; break; case POLICY_FIFO: count = POLICY_FIFO_INFO_COUNT; thread_info(pthread_mach_thread_np (inThread), THREAD_SCHED_FIFO_INFO, (thread_info_t)&(thePolicyInfo.fifo), &count); if ( (thePolicyInfo.fifo.depressed) && (inPriorityKind == CAPTHREAD_SCHEDULED_PRIORITY) ) { return thePolicyInfo.fifo.depress_priority; } return thePolicyInfo.fifo.base_priority; break; case POLICY_RR: count = POLICY_RR_INFO_COUNT; thread_info(pthread_mach_thread_np (inThread), THREAD_SCHED_RR_INFO, (thread_info_t)&(thePolicyInfo.rr), &count); if ( (thePolicyInfo.rr.depressed) && (inPriorityKind == CAPTHREAD_SCHEDULED_PRIORITY) ) { return thePolicyInfo.rr.depress_priority; } return thePolicyInfo.rr.base_priority; break; } return 0;}
#elif TARGET_OS_WIN32
UInt32 WINAPI CAPThread::Entry(CAPThread* inCAPThread){ UInt32 theAnswer = 0;
try { if(inCAPThread->mTimeConstraintSet) { inCAPThread->SetTimeConstraints(inCAPThread->mPeriod, inCAPThread->mComputation, inCAPThread->mConstraint, inCAPThread->mIsPreemptible); } else { inCAPThread->SetPriority(inCAPThread->mPriority, inCAPThread->mFixedPriority); }
if(inCAPThread->mThreadRoutine != NULL) { theAnswer = reinterpret_cast<UInt32>(inCAPThread->mThreadRoutine(inCAPThread->mThreadParameter)); } inCAPThread->mThreadID = 0; } catch (...) { // what should be done here? } return theAnswer;}
// a definition of this function here for nowextern "C"Boolean CompareAndSwap(UInt32 inOldValue, UInt32 inNewValue, UInt32* inOldValuePtr){ return InterlockedCompareExchange((volatile LONG*)inOldValuePtr, inNewValue, inOldValue) == inOldValue;}
#endif