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version 1.4, 2006/07/11 18:39:28
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version 1.4.2.7, 2006/07/30 23:11:55
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| // | // |
| //============================================================================== | //============================================================================== |
| // | // |
| // Author: Mike Day (mdday@us.ibm.com) |
// Author: Mike Brasher (m.brasher@inovadevelopment.com) |
| // |
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| // Modified By: Markus Mueller |
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| // Ramnath Ravindran (Ramnath.Ravindran@compaq.com) |
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| // David Eger (dteger@us.ibm.com) |
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| // Amit K Arora, IBM (amita@in.ibm.com) for PEP#101 |
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| // Sean Keenan, Hewlett-Packard Company (sean.keenan@hp.com) |
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| // Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com) |
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| // David Dillard, VERITAS Software Corp. |
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| // (david.dillard@veritas.com) |
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| // Aruran, IBM (ashanmug@in.ibm.com) for BUG# 3518 |
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| // | // |
| //%///////////////////////////////////////////////////////////////////////////// | //%///////////////////////////////////////////////////////////////////////////// |
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| #include <Pegasus/Common/Config.h> | #include <Pegasus/Common/Config.h> |
| #include <Pegasus/Common/Linkage.h> | #include <Pegasus/Common/Linkage.h> |
| #include <Pegasus/Common/IPCTypes.h> |
#include <Pegasus/Common/IPCExceptions.h> |
| #include <Pegasus/Common/Magic.h> | #include <Pegasus/Common/Magic.h> |
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#include <Pegasus/Common/Threads.h> |
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| PEGASUS_NAMESPACE_BEGIN | PEGASUS_NAMESPACE_BEGIN |
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//============================================================================== |
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// |
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// MutexRep |
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// |
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//============================================================================== |
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#if defined(PEGASUS_HAVE_PTHREADS) |
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typedef pthread_mutex_t MutexType; |
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inline void mutex_lock(MutexType* mutex) { pthread_mutex_lock(mutex); } |
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inline void mutex_unlock(MutexType* mutex) { pthread_mutex_unlock(mutex); } |
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struct MutexRep |
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{ |
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pthread_mutex_t mutex; |
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}; |
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# define PEGASUS_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER |
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#endif |
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#if defined(PEGASUS_HAVE_WINDOWS_THREADS) |
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typedef HANDLE MutexType; |
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inline void mutex_lock(MutexType* m) { WaitForSingleObject(*m, INFINITE); } |
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inline void mutex_unlock(MutexType* m) { ReleaseMutex(*m); } |
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struct MutexRep |
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{ |
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MutexType handle; |
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size_t count; |
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}; |
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# define PEGASUS_MUTEX_INITIALIZER (CreateMutex(NULL, FALSE, NULL)) |
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#endif |
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//============================================================================== |
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// |
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// Mutex |
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// |
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//============================================================================== |
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| class PEGASUS_COMMON_LINKAGE Mutex | class PEGASUS_COMMON_LINKAGE Mutex |
| { | { |
| public: | public: |
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| Mutex(); | Mutex(); |
| Mutex(int type); |
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| ~Mutex(); | ~Mutex(); |
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| // block until gaining the lock - throw a deadlock |
void lock(); |
| // exception if process already holds the lock |
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| // @exception Deadlock |
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| // @exception WaitFailed |
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| void lock(PEGASUS_THREAD_TYPE caller = pegasus_thread_self()); |
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| // try to gain the lock - lock succeeds immediately if the |
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| // mutex is not already locked. throws an exception and returns |
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| // immediately if the mutex is currently locked. |
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| // @exception Deadlock |
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| // @exception AlreadyLocked |
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| // @exception WaitFailed |
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| void try_lock(PEGASUS_THREAD_TYPE caller = pegasus_thread_self()); |
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| // wait for milliseconds and throw an exception then return if the wait |
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| // expires without gaining the lock. Otherwise return without throwing an |
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| // exception. |
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| // @exception Deadlock |
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| // @exception TimeOut |
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| // @exception WaitFailed |
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| void timed_lock( |
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| Uint32 milliseconds, |
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| PEGASUS_THREAD_TYPE caller = pegasus_thread_self()); |
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| // unlock the semaphore |
void try_lock(); |
| // @exception Permission |
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| void unlock(); |
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| inline PEGASUS_THREAD_TYPE get_owner() { return(_mutex.owner); } |
void timed_lock(Uint32 milliseconds); |
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void unlock(); |
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| private: | private: |
| inline void _set_owner(PEGASUS_THREAD_TYPE owner) { _mutex.owner = owner; } |
Mutex(const Mutex&); |
| PEGASUS_MUTEX_HANDLE _mutex; |
Mutex& operator=(const Mutex&); |
| PEGASUS_MUTEX_HANDLE & _get_handle() |
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MutexRep _rep; |
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Magic<0x57D11485> _magic; |
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friend class Condition; |
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}; |
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//============================================================================== |
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// |
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// AutoMutex |
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// |
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//============================================================================== |
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class PEGASUS_COMMON_LINKAGE AutoMutex |
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{ |
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public: |
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AutoMutex(Mutex& mutex, Boolean autoLock = true) : |
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_mutex(mutex), _locked(autoLock) |
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{ |
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if (autoLock) |
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_mutex.lock(); |
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} |
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~AutoMutex() |
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{ |
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try |
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{ |
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if (_locked) |
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unlock(); |
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} |
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catch (...) |
| { | { |
| return _mutex; |
// Do not propagate exception from destructor |
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} |
| } | } |
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| // Hide the assignment operator to avoid implicit use of the default |
void lock() |
| // assignment operator. Do not use this method. |
{ |
| Mutex& operator=(const Mutex& original) {return *this;} |
if (_locked) |
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throw AlreadyLocked(ThreadType()); |
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| // Hide the copy constructor to avoid implicit use of the default |
_mutex.lock(); |
| // copy constructor. Do not use this method. |
_locked = true; |
| Mutex(const Mutex& _mutex); |
} |
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| friend class Condition; |
void unlock() |
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{ |
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if (!_locked) |
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throw Permission(ThreadType()); |
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| Magic<0x57D11485> _magic; |
_mutex.unlock(); |
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_locked = false; |
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} |
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Boolean isLocked() const |
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{ |
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return _locked; |
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} |
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private: |
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AutoMutex(); // Unimplemented |
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AutoMutex(const AutoMutex& x); // Unimplemented |
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AutoMutex& operator=(const AutoMutex& x); // Unimplemented |
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Mutex& _mutex; |
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Boolean _locked; |
| }; | }; |
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| PEGASUS_NAMESPACE_END | PEGASUS_NAMESPACE_END |
Return to
Mutex.h
CVS log
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