1 karl  1.3 //%2006////////////////////////////////////////////////////////////////////////

  2 mike  1.2 //
  3           // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
  4           // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
  5           // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
  6           // IBM Corp.; EMC Corporation, The Open Group.
  7           // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
  8           // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
  9           // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
 10           // EMC Corporation; VERITAS Software Corporation; The Open Group.

 11 karl  1.3 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
 12           // EMC Corporation; Symantec Corporation; The Open Group.

 13 mike  1.2 //
 14           // Permission is hereby granted, free of charge, to any person obtaining a copy
 15           // of this software and associated documentation files (the "Software"), to
 16           // deal in the Software without restriction, including without limitation the
 17           // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 18           // sell copies of the Software, and to permit persons to whom the Software is
 19           // furnished to do so, subject to the following conditions:

 20 karl  1.3 // 

 21 mike  1.2 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
 22           // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
 23           // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 24           // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 25           // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 26           // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 27           // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 28           // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 29           //
 30           //==============================================================================
 31           //
 32           // Author: Mike Day (mdday@us.ibm.com)
 33           //
 34           // Modified By: Markus Mueller
 35           //              Ramnath Ravindran (Ramnath.Ravindran@compaq.com)
 36           //              David Eger (dteger@us.ibm.com)
 37           //              Amit K Arora, IBM (amita@in.ibm.com) for PEP#101
 38           //              Sean Keenan, Hewlett-Packard Company (sean.keenan@hp.com)
 39           //              Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)
 40           //              David Dillard, VERITAS Software Corp.
 41           //                  (david.dillard@veritas.com)
 42 mike  1.2 //              Aruran, IBM (ashanmug@in.ibm.com) for BUG# 3518
 43           //
 44           //%/////////////////////////////////////////////////////////////////////////////
 45           
 46           #ifndef Pegasus_Mutex_h
 47           #define Pegasus_Mutex_h
 48           
 49           #include <Pegasus/Common/Config.h>
 50           #include <Pegasus/Common/Linkage.h>
 51           #include <Pegasus/Common/IPCTypes.h>
 52           
 53           PEGASUS_NAMESPACE_BEGIN
 54           
 55           class PEGASUS_COMMON_LINKAGE Mutex
 56           {
 57           public:
 58           
 59               Mutex();
 60               Mutex(int type);
 61           
 62               ~Mutex();
 63 mike  1.2 
 64               // block until gaining the lock - throw a deadlock
 65               // exception if process already holds the lock
 66               // @exception Deadlock
 67               // @exception WaitFailed
 68               void lock(PEGASUS_THREAD_TYPE caller);
 69           
 70               // try to gain the lock - lock succeeds immediately if the
 71               // mutex is not already locked. throws an exception and returns
 72               // immediately if the mutex is currently locked.
 73               // @exception Deadlock
 74               // @exception AlreadyLocked
 75               // @exception WaitFailed
 76               void try_lock(PEGASUS_THREAD_TYPE caller);
 77           
 78               // wait for milliseconds and throw an exception then return if the wait
 79               // expires without gaining the lock. Otherwise return without throwing an
 80               // exception.
 81               // @exception Deadlock
 82               // @exception TimeOut
 83               // @exception WaitFailed
 84 mike  1.2     void timed_lock( Uint32 milliseconds, PEGASUS_THREAD_TYPE caller);
 85           
 86               // unlock the semaphore
 87               // @exception Permission
 88               void unlock();
 89           
 90               inline PEGASUS_THREAD_TYPE get_owner() { return(_mutex.owner); }
 91           

 92 kumpf 1.3.2.1 #if defined(PEGASUS_OS_LINUX)
 93                   /**
 94                       This method must only be called after a fork() to reset the mutex
 95                       lock status in the new process.  Any other use of this method is
 96                       unsafe.
 97                   */
 98                   void reinitialize();
 99               #endif
100               

101 mike  1.2     private:
102                   inline void _set_owner(PEGASUS_THREAD_TYPE owner) { _mutex.owner = owner; }
103                   PEGASUS_MUTEX_HANDLE _mutex;
104                   PEGASUS_MUTEX_HANDLE & _get_handle()
105                   {
106                       return _mutex;
107                   }
108               
109                   // Hide the assignment operator to avoid implicit use of the default
110                   // assignment operator.  Do not use this method.
111                   Mutex& operator=(const Mutex& original) {return *this;}
112               
113                   // Hide the copy constructor to avoid implicit use of the default
114                   // copy constructor.  Do not use this method.
115                   Mutex(const Mutex& _mutex);
116               
117                   friend class Condition;
118               };
119               
120               PEGASUS_NAMESPACE_END
121               
122 mike  1.2     #endif /* Pegasus_Mutex_h */