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File: [Pegasus] / pegasus / src / Pegasus / Common / SpinLock.cpp
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Revision: 1.9, Mon Jan 30 16:17:08 2006 UTC (18 years, 5 months ago) by karl Branch: MAIN CVS Tags: TASK_PEP233_EmbeddedInstSupport-merge_out_trunk, TASK-PEP250_RPMProvider-root, TASK-PEP250_RPMProvider-merged_out_to_branch, TASK-PEP250_RPMProvider-merged_out_from_trunk, TASK-PEP250_RPMProvider-merged_in_to_trunk, TASK-PEP250_RPMProvider-merged_in_from_branch, TASK-PEP250_RPMProvider-branch, TASK-PEP245_CimErrorInfrastructure-root, TASK-PEP245_CimErrorInfrastructure-merged_out_to_branch, TASK-PEP245_CimErrorInfrastructure-merged_out_from_trunk, TASK-PEP245_CimErrorInfrastructure-merged_in_to_trunk, TASK-PEP245_CimErrorInfrastructure-merged_in_from_branch, TASK-PEP245_CimErrorInfrastructure-branch, TASK-PEP241_OpenPegasusStressTests-root, TASK-PEP241_OpenPegasusStressTests-merged_out_to_branch, TASK-PEP241_OpenPegasusStressTests-merged_out_from_trunk, TASK-PEP241_OpenPegasusStressTests-merged_in_to_trunk, TASK-PEP241_OpenPegasusStressTests-merged_in_from_branch, TASK-PEP241_OpenPegasusStressTests-branch, TASK-BUG4011_WinLocalConnect-root, TASK-BUG4011_WinLocalConnect-merged_out_to_branch, TASK-BUG4011_WinLocalConnect-merged_out_from_trunk, TASK-BUG4011_WinLocalConnect-merged_in_to_trunk, TASK-BUG4011_WinLocalConnect-merged_in_from_branch, TASK-BUG4011_WinLocalConnect-branch, RELEASE_2_5_5-RC2, RELEASE_2_5_5-RC1, RELEASE_2_5_5, RELEASE_2_5_4-RC2, RELEASE_2_5_4-RC1, RELEASE_2_5_4, RELEASE_2_5_3-RC1, RELEASE_2_5_3, RELEASE_2_5_2-RC1, RELEASE_2_5_2, RELEASE_2_5_1-RC1, RELEASE_2_5_1, RELEASE_2_5-root, RELEASE_2_5-branch Changes since 1.8: +4 -2 lines BUG#: 4691 TITLE: Update Licenses to 2006 DESCRIPTION: Updates most of the licenses to 2006. The slp_client directories are excluded for the moment pending discussion. This change has passed unit and system tests. Note that this changes just about EVERY file in Pegasus. |
//%2006//////////////////////////////////////////////////////////////////////// // // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems. // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.; // IBM Corp.; EMC Corporation, The Open Group. // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.; // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group. // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.; // EMC Corporation; VERITAS Software Corporation; The Open Group. // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.; // EMC Corporation; Symantec Corporation; The Open Group. // // 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. // //============================================================================== // // Author: Mike Brasher, Inova Europe (mike-brasher@austin.rr.com) // // Modified By: David Dillard, Symantec Corp. (david_dillard@symantec.com) // //%///////////////////////////////////////////////////////////////////////////// #if defined(PEGASUS_OS_SOLARIS) # include <sys/types.h> # include <unistd.h> #endif #include "SpinLock.h" #if !defined(PEGASUS_OS_VMS) && !defined(PEGASUS_OS_TYPE_WINDOWS) # define PEGASUS_SPINLOCK_USE_PTHREADS #endif #ifdef PEGASUS_SPINLOCK_USE_PTHREADS # include <pthread.h> #else # include "IPC.h" #endif PEGASUS_NAMESPACE_BEGIN SpinLock spinLockPool[PEGASUS_NUM_SHARED_SPIN_LOCKS]; int spinLockPoolInitialized; #ifdef PEGASUS_SPINLOCK_USE_PTHREADS pthread_mutex_t _spinLockInitMutex = PTHREAD_MUTEX_INITIALIZER; #else static Mutex _spinLockInitMutex; #endif void SpinLockCreatePool() { // There's no need to check spinLockPoolInitialized before locking the // mutex, because the caller can check the flag before calling this // function. #ifdef PEGASUS_SPINLOCK_USE_PTHREADS pthread_mutex_lock(&_spinLockInitMutex); #else _spinLockInitMutex.lock(pegasus_thread_self()); #endif if (spinLockPoolInitialized == 0) { for (size_t i = 0; i < PEGASUS_NUM_SHARED_SPIN_LOCKS; i++) SpinLockCreate(spinLockPool[i]); spinLockPoolInitialized = 1; } #ifdef PEGASUS_SPINLOCK_USE_PTHREADS pthread_mutex_unlock(&_spinLockInitMutex); #else _spinLockInitMutex.unlock(); #endif } #if defined(PEGASUS_SPINLOCK_USE_PTHREADS) // This function is called prior to forking. We must obtain a lock // on every mutex that the child will inherit. These will remain locked // until they are unlocked (by _unlockSpinLockPool()). This prevents a // child process from waiting indefinitely on a mutex that was locked by // another thread in the parent process during the fork. extern "C" void _lockSpinLockPool() { // Initialize the spinlock pool if not already done. if (spinLockPoolInitialized == 0) SpinLockCreatePool(); pthread_mutex_lock(&_spinLockInitMutex); for (size_t i = 0; i < PEGASUS_NUM_SHARED_SPIN_LOCKS; i++) SpinLockLock(spinLockPool[i]); } // This function is called after forking. It unlocks the mutexes that // were locked by _lockSpinLockPool() before the fork. extern "C" void _unlockSpinLockPool() { pthread_mutex_unlock(&_spinLockInitMutex); for (size_t i = 0; i < PEGASUS_NUM_SHARED_SPIN_LOCKS; i++) SpinLockUnlock(spinLockPool[i]); } class SpinLockInitializer { public: SpinLockInitializer() { // ATTN: Temporary workaround for Bug 4559 #if defined(PEGASUS_OS_HPUX) || defined(PEGASUS_OS_SOLARIS) pthread_atfork( _lockSpinLockPool, _unlockSpinLockPool, _unlockSpinLockPool); #endif } }; static SpinLockInitializer spinLockInitializer; #endif /* PEGASUS_SPINLOCK_USE_PTHREADS */ PEGASUS_NAMESPACE_END
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