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version 1.6.6.2, 2008/09/29 17:41:56
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version 1.7, 2008/08/14 17:44:27
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| #include <Pegasus/Common/Mutex.h> | #include <Pegasus/Common/Mutex.h> |
| #include <Pegasus/Common/AtomicInt.h> | #include <Pegasus/Common/AtomicInt.h> |
| | |
| #define PEG_SEM_READ 1 |
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| #define PEG_SEM_WRITE 2 |
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| |
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| PEGASUS_NAMESPACE_BEGIN | PEGASUS_NAMESPACE_BEGIN |
| | |
| /** |
//============================================================================== |
| Every platform should decide which implementation for read/write locks |
// |
| should be used in OpenPegasus by defining one of the following: |
// Select the read-write-lock implementation for your platform: |
| 1.) PEGASUS_USE_POSIX_RWLOCK - POSIX standard based implementation |
// |
| 2.) PEGASUS_USE_SEMAPHORE_RWLOCK - mutex based implementation |
// PEGASUS_USE_POSIX_RWLOCK |
| |
// PEGASUS_USE_SEMAPHORE_RWLOCK |
| The definition for each platform can be found in the according platform |
// |
| header file: pegasus/src/Pegasus/Common/Platform_<Platform>.h |
//============================================================================== |
| */ |
|
| |
|
| #if !defined(PEGASUS_USE_POSIX_RWLOCK) && !defined(PEGASUS_USE_SEMAPHORE_RWLOCK) |
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| # error "Unsupported platform: ReadWriteSem.h implementation type missing" |
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| | |
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#if defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#elif defined(PEGASUS_PLATFORM_PASE_ISERIES_IBMCXX) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#elif defined(PEGASUS_PLATFORM_HPUX_ACC) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#elif defined(PEGASUS_PLATFORM_SOLARIS_SPARC_CC) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#elif defined(PEGASUS_PLATFORM_TRU64_ALPHA_DECCXX) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#elif defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#elif defined(PEGASUS_PLATFORM_VMS_IA64_DECCXX) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#elif defined(PEGASUS_PLATFORM_VMS_ALPHA_DECCXX) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#elif defined(PEGASUS_PLATFORM_LINUX_X86_64_GNU) |
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# define PEGASUS_USE_POSIX_RWLOCK |
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#else |
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# define PEGASUS_USE_SEMAPHORE_RWLOCK |
| #endif | #endif |
| | |
| //============================================================================== | //============================================================================== |
|
|
|
| // @exception WaitFailed | // @exception WaitFailed |
| inline void wait_read(ThreadType caller) | inline void wait_read(ThreadType caller) |
| { | { |
| wait(PEG_SEM_READ, caller ); |
_wait(false, caller); |
| } | } |
| | |
| // @exception Deadlock | // @exception Deadlock |
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| // @exception WaitFailed | // @exception WaitFailed |
| inline void wait_write(ThreadType caller) | inline void wait_write(ThreadType caller) |
| { | { |
| wait(PEG_SEM_WRITE, caller); |
_wait(true, caller); |
| } | } |
| | |
| // @exception Permission | // @exception Permission |
| inline void unlock_read(ThreadType caller) | inline void unlock_read(ThreadType caller) |
| { | { |
| unlock(PEG_SEM_READ, caller); |
_unlock(false, caller); |
| } | } |
| | |
| // @exception Permission | // @exception Permission |
| inline void unlock_write(ThreadType caller) | inline void unlock_write(ThreadType caller) |
| { | { |
| unlock(PEG_SEM_WRITE, caller); |
_unlock(true, caller); |
| } | } |
| | |
| int read_count() const; | int read_count() const; |
| int write_count() const; | int write_count() const; |
| | |
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private: |
| // @exception Deadlock | // @exception Deadlock |
| // @exception Permission | // @exception Permission |
| // @exception WaitFailed | // @exception WaitFailed |
| // @exception TooManyReaders |
void _wait(Boolean writeLock, ThreadType caller); |
| void wait(Uint32 mode, ThreadType caller); |
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| | |
| // @exception Permission | // @exception Permission |
| void unlock(Uint32 mode, ThreadType caller); |
void _unlock(Boolean writeLock, ThreadType caller); |
| | |
| private: |
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| AtomicInt _readers; | AtomicInt _readers; |
| AtomicInt _writers; | AtomicInt _writers; |
| ReadWriteSemRep _rwlock; | ReadWriteSemRep _rwlock; |
| friend void extricate_read_write(void *); |
|
| }; | }; |
| | |
| //============================================================================== | //============================================================================== |
Return to
ReadWriteSem.h
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