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49 lines
1.1 KiB
C++
49 lines
1.1 KiB
C++
/*
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Copyright (C) 2001 StrmnNrmn
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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 the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#pragma once
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#ifndef UTILITY_SPINLOCK_H_
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#define UTILITY_SPINLOCK_H_
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#include "System/Thread.h"
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class CSpinLock
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{
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public:
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inline explicit CSpinLock( volatile u32 * var ) : Var( var )
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{
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// N.B. - this probably needs to use a CAS to prevent race conditions
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while( *Var != 0 )
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{
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ThreadYield();
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}
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*Var = 1;
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}
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inline ~CSpinLock()
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{
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*Var = 0;
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}
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private:
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volatile u32 * Var;
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};
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#endif // UTILITY_SPINLOCK_H_
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