1/* 2 * Copyright (c) 2004 Apple Computer, Inc. All Rights Reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24 25 26#ifndef __MUTEX_H__ 27#define __MUTEX_H__ 28 29 30 31#include <pthread.h> 32 33 34 35// base class for a mutex -- note that this can't be instantiated 36class Mutex 37{ 38protected: 39 pthread_mutex_t *mMutexPtr; 40 Mutex () {} 41 42public: 43 void Lock (); 44 void Unlock (); 45}; 46 47 48 49 50// Mutex which initializes its own mutex 51class DynamicMutex : public Mutex 52{ 53protected: 54 pthread_mutex_t mMutex; 55 56public: 57 DynamicMutex (); 58 ~DynamicMutex (); 59}; 60 61 62 63// Mutex which takes an externally initialized mutex 64class StaticMutex : public Mutex 65{ 66protected: 67 pthread_mutex_t& mMutex; 68 69public: 70 StaticMutex (pthread_mutex_t &mutex); 71}; 72 73 74 75// class which locks and unlocks a mutex when it goes in and out of scope 76class MutexLocker 77{ 78protected: 79 Mutex& mMutex; 80 81public: 82 MutexLocker (Mutex &mutex); 83 ~MutexLocker (); 84}; 85 86 87 88#endif 89