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version 1.6.6.2, 2008/09/29 17:41:56
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version 1.14, 2008/09/16 18:37:03
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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 |
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| /** | /** |
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| struct ReadWriteSemRep | struct ReadWriteSemRep |
| { | { |
| pthread_rwlock_t rwlock; | pthread_rwlock_t rwlock; |
| ThreadType owner; |
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| }; | }; |
| #endif /* PEGASUS_USE_POSIX_RWLOCK */ | #endif /* PEGASUS_USE_POSIX_RWLOCK */ |
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| Semaphore _rlock; | Semaphore _rlock; |
| Mutex _wlock; | Mutex _wlock; |
| Mutex _internal_lock; | Mutex _internal_lock; |
| ThreadType _owner; |
AtomicInt _readers; |
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AtomicInt _writers; |
| ReadWriteSemRep() : | ReadWriteSemRep() : |
| _rlock(10), _wlock(), _internal_lock(), _owner(Threads::self()) |
_rlock(10), _wlock(), _internal_lock(), _readers(0), _writers(0) |
| { | { |
| } | } |
| }; | }; |
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| | |
| ~ReadWriteSem(); | ~ReadWriteSem(); |
| | |
| // @exception Deadlock |
void waitRead(); |
| // @exception Permission |
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| // @exception WaitFailed |
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| inline void wait_read(ThreadType caller) |
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| { |
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| wait(PEG_SEM_READ, caller ); |
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| } |
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| | |
| // @exception Deadlock |
void waitWrite(); |
| // @exception Permission |
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| // @exception WaitFailed |
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| inline void wait_write(ThreadType caller) |
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| { |
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| wait(PEG_SEM_WRITE, caller); |
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| } |
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| | |
| // @exception Permission |
void unlockRead(); |
| inline void unlock_read(ThreadType caller) |
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| { |
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| unlock(PEG_SEM_READ, caller); |
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| } |
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| | |
| // @exception Permission |
void unlockWrite(); |
| inline void unlock_write(ThreadType caller) |
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| { |
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| unlock(PEG_SEM_WRITE, caller); |
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| } |
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| |
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| int read_count() const; |
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| int write_count() const; |
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| |
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| // @exception Deadlock |
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| // @exception Permission |
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| // @exception WaitFailed |
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| // @exception TooManyReaders |
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| void wait(Uint32 mode, ThreadType caller); |
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| // @exception Permission |
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| void unlock(Uint32 mode, ThreadType caller); |
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| | |
| private: | private: |
| AtomicInt _readers; |
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| AtomicInt _writers; |
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| ReadWriteSemRep _rwlock; | ReadWriteSemRep _rwlock; |
| friend void extricate_read_write(void *); |
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| }; | }; |
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| //============================================================================== | //============================================================================== |
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| | |
| ReadLock(ReadWriteSem& rwsem) : _rwsem(rwsem) | ReadLock(ReadWriteSem& rwsem) : _rwsem(rwsem) |
| { | { |
| _rwsem.wait_read(Threads::self()); |
_rwsem.waitRead(); |
| } | } |
| | |
| ~ReadLock() | ~ReadLock() |
| { | { |
| _rwsem.unlock_read(Threads::self()); |
_rwsem.unlockRead(); |
| } | } |
| | |
| private: | private: |
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| | |
| WriteLock(ReadWriteSem& rwsem) : _rwsem(rwsem) | WriteLock(ReadWriteSem& rwsem) : _rwsem(rwsem) |
| { | { |
| _rwsem.wait_write(Threads::self()); |
_rwsem.waitWrite(); |
| } | } |
| | |
| ~WriteLock() | ~WriteLock() |
| { | { |
| _rwsem.unlock_write(Threads::self()); |
_rwsem.unlockWrite(); |
| } | } |
| | |
| private: | private: |
Return to
ReadWriteSem.h
CVS log
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