version 1.6.2.3, 2008/06/30 14:28:44
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version 1.10, 2008/08/29 09:23:57
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#include <Pegasus/Common/Mutex.h> | #include <Pegasus/Common/Mutex.h> |
#include <Pegasus/Common/AtomicInt.h> | #include <Pegasus/Common/AtomicInt.h> |
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#define PEG_SEM_READ 1 |
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#define PEG_SEM_WRITE 2 |
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PEGASUS_NAMESPACE_BEGIN | PEGASUS_NAMESPACE_BEGIN |
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//============================================================================== |
/** |
// |
Every platform should decide which implementation for read/write locks |
// Select the read-write-lock implementation for your platform: |
should be used in OpenPegasus by defining one of the following: |
// |
1.) PEGASUS_USE_POSIX_RWLOCK - POSIX standard based implementation |
// PEGASUS_USE_POSIX_RWLOCK |
2.) PEGASUS_USE_SEMAPHORE_RWLOCK - mutex based implementation |
// PEGASUS_USE_SEMAPHORE_RWLOCK |
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// |
The definition for each platform can be found in the according platform |
//============================================================================== |
header file: pegasus/src/Pegasus/Common/Platform_<Platform>.h |
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*/ |
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#if defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) |
#if !defined(PEGASUS_USE_POSIX_RWLOCK) && !defined(PEGASUS_USE_SEMAPHORE_RWLOCK) |
# define PEGASUS_USE_POSIX_RWLOCK |
# error "Unsupported platform: ReadWriteSem.h implementation type missing" |
#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_OS_SOLARIS) |
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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 |
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#endif | #endif |
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//============================================================================== | //============================================================================== |
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~ReadWriteSem(); | ~ReadWriteSem(); |
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// @exception Deadlock |
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// @exception Permission |
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// @exception WaitFailed | // @exception WaitFailed |
inline void wait_read(ThreadType caller) | inline void wait_read(ThreadType caller) |
{ | { |
wait(PEG_SEM_READ, caller ); |
_wait(false, caller); |
} | } |
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// @exception Deadlock |
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// @exception Permission |
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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); |
} | } |
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// @exception Permission | // @exception Permission |
inline void unlock_read(ThreadType caller) | inline void unlock_read(ThreadType caller) |
{ | { |
unlock(PEG_SEM_READ, caller); |
_unlock(false, caller); |
} | } |
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// @exception Permission | // @exception Permission |
inline void unlock_write(ThreadType caller) | inline void unlock_write(ThreadType caller) |
{ | { |
unlock(PEG_SEM_WRITE, caller); |
_unlock(true, caller); |
} | } |
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int read_count() const; | int read_count() const; |
int write_count() const; | int write_count() const; |
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// @exception Deadlock |
private: |
// @exception Permission |
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// @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); |
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private: |
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AtomicInt _readers; | AtomicInt _readers; |
AtomicInt _writers; | AtomicInt _writers; |
ReadWriteSemRep _rwlock; | ReadWriteSemRep _rwlock; |
friend void extricate_read_write(void *); |
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}; | }; |
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//============================================================================== | //============================================================================== |