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99 lines
2.5 KiB
99 lines
2.5 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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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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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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#ifndef CoreLib_Thread |
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#define CoreLib_Thread |
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#include "hsThread.h" |
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#include "hsUtils.h" |
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////////////////////////////////////////////////////////////////////////////// |
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hsReaderWriterLock::hsReaderWriterLock( const char * name, Callback * cb ) |
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: fReaderCount( 0 ) |
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, fWriterSema( 1 ) |
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, fCallback( cb ) |
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, fName( nil ) |
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{ |
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fName = hsStrcpy( name ); |
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} |
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hsReaderWriterLock::~hsReaderWriterLock() |
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{ |
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delete [] fName; |
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} |
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void hsReaderWriterLock::LockForReading() |
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{ |
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if ( fCallback ) |
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fCallback->OnLockingForRead( this ); |
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fReaderCountLock.Lock(); |
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fReaderLock.Lock(); |
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fReaderCount++; |
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if ( fReaderCount==1 ) |
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fWriterSema.Wait(); |
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fReaderLock.Unlock(); |
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fReaderCountLock.Unlock(); |
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if ( fCallback ) |
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fCallback->OnLockedForRead( this ); |
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} |
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void hsReaderWriterLock::UnlockForReading() |
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{ |
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if ( fCallback ) |
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fCallback->OnUnlockingForRead( this ); |
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fReaderLock.Lock(); |
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fReaderCount--; |
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if ( fReaderCount==0 ) |
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fWriterSema.Signal(); |
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fReaderLock.Unlock(); |
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if ( fCallback ) |
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fCallback->OnUnlockedForRead( this ); |
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} |
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void hsReaderWriterLock::LockForWriting() |
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{ |
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if ( fCallback ) |
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fCallback->OnLockingForWrite( this ); |
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fReaderCountLock.Lock(); |
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fWriterSema.Wait(); |
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hsAssert( fReaderCount==0, "Locked for writing, but fReaderCount>0" ); |
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if ( fCallback ) |
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fCallback->OnLockedForWrite( this ); |
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} |
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void hsReaderWriterLock::UnlockForWriting() |
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{ |
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if ( fCallback ) |
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fCallback->OnUnlockingForWrite( this ); |
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fWriterSema.Signal(); |
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fReaderCountLock.Unlock(); |
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if ( fCallback ) |
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fCallback->OnUnlockedForWrite( this ); |
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} |
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#endif // CoreLib_Thread
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