c55dab446f
git-svn-id: https://svn.code.sf.net/p/flaim/code/trunk@7 0109f412-320b-0410-ab79-c3e0c5ffbbe6
100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
//-------------------------------------------------------------------------
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// Desc: Definitions for mutex handling class
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// Tabs: 3
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//
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// Copyright (c) 1998-2000,2002-2006 Novell, Inc. All Rights Reserved.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the GNU General Public
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// License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, contact Novell, Inc.
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//
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// To contact Novell about this file by physical or electronic mail,
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// you may find current contact information at www.novell.com
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//
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// $Id: fmutxref.h 12329 2006-01-20 17:49:30 -0700 (Fri, 20 Jan 2006) ahodgkinson $
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//-------------------------------------------------------------------------
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#ifndef FMUTXREF_H
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#define FMUTXREF_H
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#include "fpackon.h"
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// IMPORTANT NOTE: No other include files should follow this one except
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// for fpackoff.h
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/****************************************************************************
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Desc: This object provides management and use of a mutex
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****************************************************************************/
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class F_MutexRef : public F_Base
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{
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public:
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F_MutexRef( // Constructor
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F_MUTEX * phMutex) // Actual semaphore object to use.
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{
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m_phMutex = phMutex;
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m_uiLockCount = 0;
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};
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virtual ~F_MutexRef() // Destructor - make sure lock count == 0.
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{
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/* Unlock the semaphore if it is locked.
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The semaphore could be still locked on an error condition within the
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users code.
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*/
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if( m_uiLockCount != 0)
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{
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(void)f_mutexUnlock( *m_phMutex);
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}
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};
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void Lock() // Locks the semaphore
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{
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if( m_phMutex)
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{
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if( !m_uiLockCount)
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{
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(void)f_mutexLock( *m_phMutex);
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}
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m_uiLockCount++;
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}
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};
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void Unlock() // Unlock the semaphore
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{
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if( m_phMutex)
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{
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//flmAssert( m_uiLockCount != 0); // Should not be zero
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if( !( --m_uiLockCount))
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{
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(void)f_mutexUnlock( *m_phMutex);
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}
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}
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};
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// AddRef/Release provided by F_Base
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//FLMUINT AddRef(); // Increment ref count for this object
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//FLMUINT Release(); // Decrement ref count, if 0 then delete.
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private:
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FLMUINT m_uiLockCount; // Number of times the semaphore has
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// been locked by the thread.
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F_MUTEX * m_phMutex; // Pointer to semaphore. If NULL,
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// there is no need to lock and
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// unlock the semaphore because the
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// objects it is controlling are NOT
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// shared.
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};
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#include "fpackoff.h"
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#endif
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