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File: [Pegasus] / pegasus / src / Pegasus / Common / Semaphore.h
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Revision: 1.4, Fri Dec 1 22:40:23 2006 UTC (17 years, 7 months ago) by mike Branch: MAIN CVS Tags: TASK-PEP291_IPV6-root, TASK-PEP291_IPV6-branch, TASK-PEP286_PRIVILEGE_SEPARATION-root, TASK-PEP286_PRIVILEGE_SEPARATION-branch, TASK-PEP274_dacim-root, TASK-PEP274_dacim-merged_out_to_branch, TASK-PEP274_dacim-merged_out_from_trunk, TASK-PEP274_dacim-merged_in_to_trunk, TASK-PEP274_dacim-merged_in_from_branch, TASK-PEP274_dacim-branch, TASK-Bug2102_RCMPIWindows-root, TASK-Bug2102_RCMPIWindows-merged_out_to_branch, TASK-Bug2102_RCMPIWindows-merged_out_from_trunk, TASK-Bug2102_RCMPIWindows-merged_in_to_trunk, TASK-Bug2102_RCMPIWindows-merged_in_from_branch, TASK-Bug2102_RCMPIWindows-branch, TASK-Bug2102Final-root, TASK-Bug2102Final-merged_out_to_branch, TASK-Bug2102Final-merged_out_from_trunk, TASK-Bug2102Final-merged_in_to_trunk, TASK-Bug2102Final-merged_in_from_branch, TASK-Bug2102Final-branch, TASK-BUG7240-root, TASK-BUG7240-branch, RELEASE_2_6_3-RC2, RELEASE_2_6_3-RC1, RELEASE_2_6_3, RELEASE_2_6_2-RC1, RELEASE_2_6_2, RELEASE_2_6_1-RC1, RELEASE_2_6_1, RELEASE_2_6_0-RC1, RELEASE_2_6_0, RELEASE_2_6-root, RELEASE_2_6-branch-clean, RELEASE_2_6-branch, PEP286_PRIVILEGE_SEPARATION_ROOT, PEP286_PRIVILEGE_SEPARATION_CODE_FREEZE, PEP286_PRIVILEGE_SEPARATION_BRANCH, PEP286_PRIVILEGE_SEPARATION_1 Changes since 1.3: +1 -1 lines BUG#: 5907 TITLE: Port to DARWIN_IX86_GNU DESCRIPTION: Ported to DARWIN_IX86_GNU platform (modeled after DARWIN_PPC_GNU). |
//%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. // //============================================================================== // //%///////////////////////////////////////////////////////////////////////////// #ifndef Pegasus_Semaphore_h #define Pegasus_Semaphore_h #include <Pegasus/Common/Config.h> #include <Pegasus/Common/Linkage.h> #include <Pegasus/Common/Threads.h> //============================================================================== // // Select sempahore implementation by defining one of these: // // PEGASUS_USE_POSIX_SEMAPHORE // PEGASUS_USE_PTHREAD_SEMAPHORE // PEGASUS_USE_WINDOWS_SEMAPHORE // //============================================================================== #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) || \ defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) || \ defined(PEGASUS_OS_DARWIN) || \ defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) || \ defined(PEGASUS_PLATFORM_VMS_IA64_DECCXX) || \ defined(PEGASUS_PLATFORM_VMS_ALPHA_DECCXX) # define PEGASUS_USE_PTHREAD_SEMAPHORE #elif defined(PEGASUS_OS_TYPE_WINDOWS) # define PEGASUS_USE_WINDOWS_SEMAPHORE #else # define PEGASUS_USE_POSIX_SEMAPHORE #endif #if defined(PEGASUS_USE_POSIX_SEMAPHORE) # include <semaphore.h> #endif PEGASUS_NAMESPACE_BEGIN //============================================================================== // // SemaphoreRep // //============================================================================== #if defined(PEGASUS_USE_PTHREAD_SEMAPHORE) struct SemaphoreRep { Uint32 waiters; pthread_mutex_t mutex; pthread_cond_t cond; ThreadType owner; }; #endif /* PEGASUS_USE_PTHREAD_SEMAPHORE */ #if defined(PEGASUS_USE_POSIX_SEMAPHORE) struct SemaphoreRep { sem_t sem; ThreadType owner; }; #endif /* defined(PEGASUS_USE_POSIX_SEMAPHORE) */ #if defined(PEGASUS_USE_WINDOWS_SEMAPHORE) struct SemaphoreRep { HANDLE sem; ThreadType owner; }; #endif /* PEGASUS_USE_WINDOWS_SEMAPHORE */ //============================================================================== // // Semaphore // //============================================================================== class PEGASUS_COMMON_LINKAGE Semaphore { public: /** Creates a semaphore and sets its initial value as specified. @param initial The initial value for the Semaphore (defaults to 1). */ Semaphore(Uint32 initial = 1); /** Destructor. */ ~Semaphore(); /** Blocks until this Semaphore is in a signalled state. @param ignoreInterrupt Indicates whether the wait operation should continue (true) or an exception should be thrown (false) when an interrupt is received. @exception WaitFailed If unable to block on the semaphore. @exception WaitInterrupted If the operation is interrupted. */ void wait(Boolean ignoreInterrupt = true); /** Checks whether the Semaphore is signalled without waiting. This method returns normally if the Semaphore has a non-zero count. @exception WaitFailed If the wait operation does not immediately succeed. */ void try_wait(); /** Waits for the Semaphore to be signalled for a specified time interval. This method returns normally if the Semaphore has a non-zero count or it is signalled during the specified time interval. @param milliseconds The time interval to wait (in milliseconds). @exception TimeOut If the wait operation does not succeed within the specified time interval. */ void time_wait(Uint32 milliseconds); /** Increments the count of the semaphore. */ void signal(); /** Return the count of the semaphore. */ int count() const; private: Semaphore(const Semaphore& x); // Unimplemented Semaphore& operator=(const Semaphore& x); // Unimplemented mutable int _count; mutable SemaphoreRep _rep; friend class Condition; }; PEGASUS_NAMESPACE_END #endif /* Pegasus_Semaphore_h */
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