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File: [Pegasus] / pegasus / src / Pegasus / Common / Mutex.h
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Revision: 1.18, Tue Dec 2 09:00:50 2008 UTC (15 years, 6 months ago) by martin Branch: MAIN CVS Tags: preBug9676, postBug9676, TASK_PEP317_1JUNE_2013, TASK-TASK_PEP362_RestfulService_branch-root, TASK-TASK_PEP362_RestfulService_branch-merged_out_from_trunk, TASK-TASK_PEP362_RestfulService_branch-merged_in_to_trunk, TASK-TASK_PEP362_RestfulService_branch-merged_in_from_branch, TASK-TASK_PEP362_RestfulService_branch-branch, TASK-PEP362_RestfulService-root, TASK-PEP362_RestfulService-merged_out_to_branch, TASK-PEP362_RestfulService-merged_out_from_trunk, TASK-PEP362_RestfulService-merged_in_to_trunk, TASK-PEP362_RestfulService-merged_in_from_branch, TASK-PEP362_RestfulService-branch, TASK-PEP348_SCMO-root, TASK-PEP348_SCMO-merged_out_to_branch, TASK-PEP348_SCMO-merged_out_from_trunk, TASK-PEP348_SCMO-merged_in_to_trunk, TASK-PEP348_SCMO-merged_in_from_branch, TASK-PEP348_SCMO-branch, TASK-PEP317_pullop-root, TASK-PEP317_pullop-merged_out_to_branch, TASK-PEP317_pullop-merged_out_from_trunk, TASK-PEP317_pullop-merged_in_to_trunk, TASK-PEP317_pullop-merged_in_from_branch, TASK-PEP317_pullop-branch, RELEASE_2_9_2-RC2, RELEASE_2_9_2-RC1, RELEASE_2_9_2, RELEASE_2_9_1-RC1, RELEASE_2_9_1, RELEASE_2_9_0-RC1, RELEASE_2_9_0-FC, RELEASE_2_9_0, RELEASE_2_9-root, RELEASE_2_9-branch, RELEASE_2_14_1, RELEASE_2_14_0-RC2, RELEASE_2_14_0-RC1, RELEASE_2_14_0, RELEASE_2_14-root, RELEASE_2_14-branch, RELEASE_2_13_0-RC2, RELEASE_2_13_0-RC1, RELEASE_2_13_0-FC, RELEASE_2_13_0, RELEASE_2_13-root, RELEASE_2_13-branch, RELEASE_2_12_1-RC1, RELEASE_2_12_1, RELEASE_2_12_0-RC1, RELEASE_2_12_0-FC, RELEASE_2_12_0, RELEASE_2_12-root, RELEASE_2_12-branch, RELEASE_2_11_2-RC1, RELEASE_2_11_2, RELEASE_2_11_1-RC1, RELEASE_2_11_1, RELEASE_2_11_0-RC1, RELEASE_2_11_0-FC, RELEASE_2_11_0, RELEASE_2_11-root, RELEASE_2_11-branch, RELEASE_2_10_1-RC1, RELEASE_2_10_1, RELEASE_2_10_0-RC2, RELEASE_2_10_0-RC1, RELEASE_2_10_0, RELEASE_2_10-root, RELEASE_2_10-branch, PREAUG25UPDATE, POSTAUG25UPDATE, HPUX_TEST, HEAD, CIMRS_WORK_20130824, BeforeUpdateToHeadOct82011 Changes since 1.17: +6 -6 lines BUG#: 8123 TITLE: Update copyright/license text DESCRIPTION: Fixing trailing spaces in copyright/license text |
//%LICENSE//////////////////////////////////////////////////////////////// // // Licensed to The Open Group (TOG) under one or more contributor license // agreements. Refer to the OpenPegasusNOTICE.txt file distributed with // this work for additional information regarding copyright ownership. // Each contributor licenses this file to you under the OpenPegasus Open // Source License; you may not use this file except in compliance with the // License. // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included // in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // ////////////////////////////////////////////////////////////////////////// // //%///////////////////////////////////////////////////////////////////////////// #ifndef Pegasus_Mutex_h #define Pegasus_Mutex_h #include <Pegasus/Common/Config.h> #include <Pegasus/Common/Linkage.h> #include <Pegasus/Common/Magic.h> #include <Pegasus/Common/Threads.h> PEGASUS_NAMESPACE_BEGIN //============================================================================== // // MutexRep // //============================================================================== #if defined(PEGASUS_HAVE_PTHREADS) typedef pthread_mutex_t MutexType; inline void mutex_lock(MutexType* mutex) { pthread_mutex_lock(mutex); } inline void mutex_unlock(MutexType* mutex) { pthread_mutex_unlock(mutex); } struct MutexRep { pthread_mutex_t mutex; int count; }; # define PEGASUS_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER #endif #if defined(PEGASUS_HAVE_WINDOWS_THREADS) typedef HANDLE MutexType; inline void mutex_lock(MutexType* m) { WaitForSingleObject(*m, INFINITE); } inline void mutex_unlock(MutexType* m) { ReleaseMutex(*m); } struct MutexRep { MutexType handle; size_t count; }; # define PEGASUS_MUTEX_INITIALIZER (CreateMutex(NULL, FALSE, NULL)) #endif //============================================================================== // // Mutex // //============================================================================== class PEGASUS_COMMON_LINKAGE Mutex { public: enum RecursiveTag { RECURSIVE }; enum NonRecursiveTag { NON_RECURSIVE }; /** Default constructor creates a recursive mutex. */ Mutex(); /** Call as Mutex(Mutex::RECURSIVE) to create a recursive mutex. */ Mutex(RecursiveTag); /** Call as Mutex(Mutex::NON_RECURSIVE) to create a non-recursive mutex. */ Mutex(NonRecursiveTag); ~Mutex(); void lock(); /** Attempts to lock the mutex without blocking. @return A Boolean indicating whether the lock was acquired. */ Boolean try_lock(); /** Attempts to lock the mutex within the specified time. @param milliseconds The maximum time to block while attempting to acquire the lock. @return A Boolean indicating whether the lock was acquired. */ Boolean timed_lock(Uint32 milliseconds); void unlock(); #if defined(PEGASUS_OS_LINUX) /** This method must only be called after a fork() to reset the mutex lock status in the new process. Any other use of this method is unsafe. */ void reinitialize(); #endif private: Mutex(const Mutex&); Mutex& operator=(const Mutex&); MutexRep _rep; Magic<0x57D11485> _magic; friend class Condition; }; //============================================================================== // // AutoMutex // //============================================================================== class PEGASUS_COMMON_LINKAGE AutoMutex { public: AutoMutex(Mutex& mutex) : _mutex(mutex) { _mutex.lock(); } ~AutoMutex() { _mutex.unlock(); } private: AutoMutex(); // Unimplemented AutoMutex(const AutoMutex& x); // Unimplemented AutoMutex& operator=(const AutoMutex& x); // Unimplemented Mutex& _mutex; }; //============================================================================== // // PEGASUS_FORK_SAFE_MUTEX // //============================================================================== // Use of this macro ensures that a static Mutex is not locked across a fork(). #if !defined(PEGASUS_HAVE_PTHREADS) || \ defined(PEGASUS_OS_ZOS) || \ defined(PEGASUS_OS_VMS) # define PEGASUS_FORK_SAFE_MUTEX(mutex) #elif defined(PEGASUS_OS_LINUX) # define PEGASUS_FORK_SAFE_MUTEX(mutex) \ class ForkSafeMutex ## mutex \ { \ public: \ ForkSafeMutex ## mutex() \ { \ pthread_atfork( \ 0, \ 0, \ _reinitializeMutex); \ } \ \ private: \ static void _reinitializeMutex() \ { \ mutex.reinitialize(); \ } \ }; \ \ static ForkSafeMutex ## mutex __forkSafeMutex ## mutex; #else # define PEGASUS_FORK_SAFE_MUTEX(mutex) \ class ForkSafeMutex ## mutex \ { \ public: \ ForkSafeMutex ## mutex() \ { \ pthread_atfork( \ _lockMutex, \ _unlockMutex, \ _unlockMutex); \ } \ \ private: \ static void _lockMutex() \ { \ mutex.lock(); \ } \ \ static void _unlockMutex() \ { \ mutex.unlock(); \ } \ }; \ \ static ForkSafeMutex ## mutex __forkSafeMutex ## mutex; #endif PEGASUS_NAMESPACE_END #endif /* Pegasus_Mutex_h */
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