chxavmutex.h
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上传日期:2013-07-19
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文件大小:2k
- /*****************************************************************************
- * chxavmutex.h
- * ------------
- *
- * Synopsis:
- * This class is a C++ wrapper for the pthreads mutex primitive.
- *
- * Target:
- * Symbian OS
- *
- *
- * (c) 1995-2003 RealNetworks, Inc. Patents pending. All rights reserved.
- *
- *****************************************************************************/
- #ifndef _chxavmutex_h_
- #define _chxavmutex_h_
- // Symbian includes...
- #include <e32base.h>
- #include <e32cons.h>
- #include <e32std.h>
- #include "bsthread/thread_error.h"
- //
- // bsMutex class
- //
- class CHXAvMutex {
- public:
- friend class bsConditionVar;
- CHXAvMutex ();
- ~CHXAvMutex ();
- void Lock ();
-
- void Unlock ();
- bool TryLock ();
- private:
- CHXAvMutex (const CHXAvMutex& m); // disallow copies
- void operator= (const CHXAvMutex& m); // disallow copies
- RMutex m_cs;
- };
- //
- // bsMutex methods
- //
- inline
- bsMutex::bsMutex ()
- {
- // create a process-relative, local mutex
- TInt ret = m_cs.CreateLocal();
- if (ret != KErrNone)
- bsThreadError (ret);
- }
- inline
- bsMutex::~bsMutex ()
- {
- m_cs.Close();
- }
- inline
- void bsMutex::Lock ()
- {
- m_cs.Wait();
- }
- inline
- void bsMutex::Unlock ()
- {
- m_cs.Signal();
- }
- inline
- bool bsMutex::TryLock ()
- {
- //
- // XXXCBR -- this isn't right - we might get locked by another
- // thread after we check Count() but before we can Wait().
- //
- if (m_cs.Count() < 1)
- return false;
- else
- m_cs.Wait();
- return true;
- }
- #endif // _MUTEX_H_