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Diff for /pegasus/src/Pegasus/Common/Mutex.cpp between version 1.2 and 1.3.14.2

version 1.2, 2005/10/24 19:35:25 version 1.3.14.2, 2006/07/28 17:41:27
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 //%2005////////////////////////////////////////////////////////////////////////  //%2006////////////////////////////////////////////////////////////////////////
 // //
 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems. // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
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 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group. // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.; // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
 // EMC Corporation; VERITAS Software Corporation; The Open Group. // EMC Corporation; VERITAS Software Corporation; The Open Group.
   // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
   // EMC Corporation; Symantec Corporation; The Open Group.
 // //
 // Permission is hereby granted, free of charge, to any person obtaining a copy // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to // of this software and associated documentation files (the "Software"), to
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 //                  (david.dillard@veritas.com) //                  (david.dillard@veritas.com)
 //              Aruran, IBM (ashanmug@in.ibm.com) for BUG# 3518 //              Aruran, IBM (ashanmug@in.ibm.com) for BUG# 3518
 // //
   // Reworked By: Mike Brasher (m.brasher@inovadevelopment.com)
   //
 //%///////////////////////////////////////////////////////////////////////////// //%/////////////////////////////////////////////////////////////////////////////
  
 #include "Mutex.h" #include "Mutex.h"
   #include "Time.h"
   #include "PegasusAssert.h"
  
 PEGASUS_NAMESPACE_BEGIN PEGASUS_NAMESPACE_BEGIN
  
   //==============================================================================
   //
   // PEGASUS_HAVE_PTHREADS
   //
   //==============================================================================
   
   #if defined(PEGASUS_HAVE_PTHREADS)
   
   Mutex::Mutex()
   {
       pthread_mutexattr_init(&_rep.attr);
   
       // If your platform does not define PTHREAD_MUTEX_RECURSIVE, try
       // PTHREAD_MUTEX_RECURSIVE_NP.
       pthread_mutexattr_settype(&_rep.attr, PTHREAD_MUTEX_RECURSIVE);
   
       pthread_mutex_init(&_rep.mutex, &_rep.attr);
       _rep.owner.clear();
   }
   
   Mutex::~Mutex()
   {
      PEGASUS_DEBUG_ASSERT(_magic);
   
       if (pthread_mutex_destroy(&_rep.mutex) == 0)
           pthread_mutexattr_destroy(&_rep.attr);
   }
   
   void Mutex::lock(ThreadType caller)
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       switch (pthread_mutex_lock(&_rep.mutex))
       {
           case 0:
               _rep.owner = caller;
               break;
   
           case EDEADLK:
               throw Deadlock(_rep.owner);
   
           default:
               throw WaitFailed(_rep.owner);
       }
   }
   
   void Mutex::try_lock(ThreadType caller)
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       switch (pthread_mutex_trylock(&_rep.mutex))
       {
           case 0:
               _rep.owner = caller;
               break;
   
           case EBUSY:
               throw AlreadyLocked(_rep.owner);
   
           case EDEADLK:
               throw Deadlock(_rep.owner);
   
           default:
               throw WaitFailed(_rep.owner);
       }
   }
   
   void Mutex::timed_lock(Uint32 milliseconds, ThreadType caller)
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       struct timeval now;
       struct timeval finish;
       struct timeval remaining;
       {
           Uint32 usec;
           gettimeofday(&finish, NULL);
           finish.tv_sec += (milliseconds / 1000 );
           milliseconds %= 1000;
           usec = finish.tv_usec + ( milliseconds * 1000 );
           finish.tv_sec += (usec / 1000000);
           finish.tv_usec = usec % 1000000;
       }
   
       for (;;)
       {
           switch (pthread_mutex_trylock(&_rep.mutex))
           {
               case 0:
                   return;
   
               case EBUSY:
               {
                   gettimeofday(&now, NULL);
   
                   if (Time::subtract(&remaining, &finish, &now))
                       throw TimeOut(Threads::self());
   
                   Threads::yield();
                   break;
               }
   
               case EDEADLK:
                   throw Deadlock(Threads::self());
   
               default:
                   throw WaitFailed(Threads::self());
           }
       }
   }
   
   void Mutex::unlock()
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       ThreadType owner = _rep.owner;
       _rep.owner.clear();
   
       if (pthread_mutex_unlock(&_rep.mutex) != 0)
       {
           _rep.owner = owner;
           throw Permission(_rep.owner);
       }
   }
   
   #endif /* PEGASUS_HAVE_PTHREADS */
   
   //==============================================================================
   //
   // PEGASUS_HAVE_WINDOWS_THREADS
   //
   //==============================================================================
   
   #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
   
   Mutex::Mutex()
   {
       _rep.handle = CreateMutex(NULL, FALSE, NULL);
       _rep.owner = ThreadType(0);
       _rep.count.clear();
   }
   
   Mutex::~Mutex()
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       WaitForSingleObject(_rep.handle, INFINITE);
       CloseHandle(_rep.handle);
   }
   
   void Mutex::lock(ThreadType caller)
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       DWORD rc = WaitForSingleObject(_rep.handle, INFINITE);
   
       if (rc == WAIT_FAILED)
           throw WaitFailed(_rep.owner);
   
       _rep.owner = caller;
       _rep.count++;
   }
   
   void Mutex::try_lock(ThreadType caller)
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       DWORD rc = WaitForSingleObject(_rep.handle, 0);
   
       if (rc == WAIT_TIMEOUT)
           throw AlreadyLocked(_rep.owner);
   
       if (rc == WAIT_FAILED)
           throw WaitFailed(_rep.owner);
   
       _rep.owner = caller;
       _rep.count++;
   }
   
   void Mutex::timed_lock(Uint32 milliseconds , ThreadType caller)
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       DWORD rc = WaitForSingleObject(_rep.handle, milliseconds);
   
       if (rc == WAIT_TIMEOUT)
           throw TimeOut(_rep.owner);
   
       if (rc == WAIT_FAILED)
           throw WaitFailed(_rep.owner);
   
       _rep.owner = caller;
       _rep.count++;
   }
   
   void Mutex::unlock()
   {
       PEGASUS_DEBUG_ASSERT(_magic);
   
       _rep.owner.clear();
       _rep.count--;
       ReleaseMutex(_rep.handle);
   }
   
   #endif /* PEGASUS_HAVE_WINDOWS_THREADS */
   
 PEGASUS_NAMESPACE_END PEGASUS_NAMESPACE_END

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