atomicops.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: atomicops.cpp,v 1.1.32.3 2004/07/09 01:48:15 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
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- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #if !defined (HXATOMIC_MUTEX_POOL_SIZE)
- #define HXATOMIC_MUTEX_POOL_SIZE 256 // must be a power of 2
- #endif
- #include "hxtypes.h"
- #include "atomicbase.h"
- #include "microsleep.h"
- #include "hxcom.h"
- #include "hxmutexlock.h"
- #include "hxassert.h"
- HXAtomic g_AtomicOps;
- HXAtomic::HXAtomic()
- : m_pLocks(0)
- {
- }
- HXAtomic::~HXAtomic()
- {
- HX_DELETE(m_pLocks);
- }
- void
- HXAtomic::Lock(HX_MUTEX pLock)
- {
- while (_HXMutexSetBit((pLock)))
- {
- /*spin - this is fine since the locks are held so briefly */
- }
- };
- void
- HXAtomic::Unlock(HX_MUTEX pLock)
- {
- _HXMutexClearBit((pLock));
- };
- void
- HXAtomic::InitLockPool()
- {
- HX_ASSERT(!m_pLocks);
- HX_MUTEX* pLocks = new HX_MUTEX[HXATOMIC_MUTEX_POOL_SIZE];
- for (int i=0; i < HXATOMIC_MUTEX_POOL_SIZE; ++i)
- {
- pLocks[i] = HXMutexCreate();
- }
- m_pLocks = pLocks;
- };
- INT32
- HXAtomic::_AddRetINT32(INT32* pNum, INT32 nNum)
- {
- register INT32 nRet;
- if (m_pLocks)
- {
- register int nIndex = ((UINT32)(PTR_INT)pNum >> 4) & (HXATOMIC_MUTEX_POOL_SIZE - 1);
- register HX_MUTEX pLock = (HX_MUTEX) m_pLocks[nIndex];
- Lock(pLock);
- nRet = *pNum;
- nRet += nNum;
- *pNum = nRet;
- Unlock(pLock);
- return nRet;
- }
- // locks are not defined, so just do it -- (non-threadsafe!)
- nRet = *pNum;
- nRet += nNum;
- *pNum = nRet;
- return nRet;
- };
- UINT32
- HXAtomic::_AddRetUINT32(UINT32* pNum, UINT32 ulNum)
- {
- register UINT32 ulRet;
- if (m_pLocks)
- {
- register int nIndex = ((UINT32)(PTR_INT)pNum >> 4) & (HXATOMIC_MUTEX_POOL_SIZE - 1);
- register HX_MUTEX pLock = (HX_MUTEX) m_pLocks[nIndex];
- Lock(pLock);
- ulRet = *pNum;
- ulRet += ulNum;
- *pNum = ulRet;
- Unlock(pLock);
- return ulRet;
- }
- // locks are not defined, so just do it -- (non-threadsafe!)
- ulRet = *pNum;
- ulRet += ulNum;
- *pNum = ulRet;
- return ulRet;
- };
- INT32
- HXAtomic::_SubRetINT32(INT32* pNum, INT32 nNum)
- {
- register INT32 nRet;
- if (m_pLocks)
- {
- register int nIndex = ((UINT32)(PTR_INT)pNum >> 4) & (HXATOMIC_MUTEX_POOL_SIZE - 1);
- register HX_MUTEX pLock = (HX_MUTEX) m_pLocks[nIndex];
- Lock(pLock);
- nRet = *pNum;
- nRet -= nNum;
- *pNum = nRet;
- Unlock(pLock);
- return nRet;
- }
- // locks are not defined, so just do it -- (non-threadsafe!)
- nRet = *pNum;
- nRet -= nNum;
- *pNum = nRet;
- return nRet;
- };
- UINT32
- HXAtomic::_SubRetUINT32(UINT32* pNum, UINT32 ulNum)
- {
- register UINT32 ulRet;
- if (m_pLocks)
- {
- register int nIndex = ((UINT32)(PTR_INT)pNum >> 4) & (HXATOMIC_MUTEX_POOL_SIZE - 1);
- register HX_MUTEX pLock = (HX_MUTEX) m_pLocks[nIndex];
- Lock(pLock);
- ulRet = *pNum;
- ulRet -= ulNum;
- *pNum = ulRet;
- Unlock(pLock);
- return ulRet;
- }
- // locks are not defined, so just do it -- (non-threadsafe!)
- ulRet = *pNum;
- ulRet -= ulNum;
- *pNum = ulRet;
- return ulRet;
- };