148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
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/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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/*
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File: OSMutex.h
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Contains: Platform - independent mutex header. The implementation of this object
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is platform - specific. Each platform must define an independent
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OSMutex.h & OSMutex.cpp file.
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This file is for Mac OS X Server only
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*/
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#ifndef _OSMUTEX_H_
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#define _OSMUTEX_H_
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#include <stdlib.h>
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#include "SafeStdLib.h"
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#ifndef __Win32__
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#include <sys/errno.h>
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#if __PTHREADS_MUTEXES__
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#if __MacOSX__
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#ifndef _POSIX_PTHREAD_H
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#include <pthread.h>
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#endif
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#else
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#include <pthread.h>
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#endif
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#include <unistd.h>
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#else
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#include "mymutex.h"
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#endif
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#endif
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#include "OSHeaders.h"
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#include "OSThread.h"
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#include "MyAssert.h"
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class OSCond;
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class OSMutex
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{
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public:
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OSMutex();
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~OSMutex();
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inline void Lock();
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inline void Unlock();
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// Returns true on successful grab of the lock, false on failure
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inline Bool16 TryLock();
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private:
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#ifdef __Win32__
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CRITICAL_SECTION fMutex;
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DWORD fHolder;
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UInt32 fHolderCount;
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#elif !__PTHREADS_MUTEXES__
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mymutex_t fMutex;
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#else
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pthread_mutex_t fMutex;
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// These two platforms don't implement pthreads recursive mutexes, so
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// we have to do it manually
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pthread_t fHolder;
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UInt32 fHolderCount;
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#endif
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#if __PTHREADS_MUTEXES__ || __Win32__
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void RecursiveLock();
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void RecursiveUnlock();
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Bool16 RecursiveTryLock();
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#endif
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friend class OSCond;
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};
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class OSMutexLocker
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{
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public:
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OSMutexLocker(OSMutex *inMutexP) : fMutex(inMutexP) { if (fMutex != NULL) fMutex->Lock(); }
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~OSMutexLocker() { if (fMutex != NULL) fMutex->Unlock(); }
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void Lock() { if (fMutex != NULL) fMutex->Lock(); }
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void Unlock() { if (fMutex != NULL) fMutex->Unlock(); }
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private:
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OSMutex* fMutex;
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};
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void OSMutex::Lock()
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{
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#if __PTHREADS_MUTEXES__ || __Win32__
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this->RecursiveLock();
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#else
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mymutex_lock(fMutex);
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#endif //!__PTHREADS__
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}
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void OSMutex::Unlock()
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{
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#if __PTHREADS_MUTEXES__ || __Win32__
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this->RecursiveUnlock();
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#else
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mymutex_unlock(fMutex);
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#endif //!__PTHREADS__
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}
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Bool16 OSMutex::TryLock()
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{
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#if __PTHREADS_MUTEXES__ || __Win32__
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return this->RecursiveTryLock();
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#else
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return (Bool16)mymutex_try_lock(fMutex);
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#endif //!__PTHREADS__
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}
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#endif //_OSMUTEX_H_
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