54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file conditionVarSpinlockImpl.h
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* @author drose
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* @date 2006-04-11
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*/
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#ifndef CONDITIONVARSPINLOCKIMPL_H
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#define CONDITIONVARSPINLOCKIMPL_H
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#include "pandabase.h"
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#include "selectThreadImpl.h"
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#ifdef MUTEX_SPINLOCK
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#include "mutexSpinlockImpl.h"
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#include "pnotify.h"
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#include "atomicAdjust.h"
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class MutexSpinlockImpl;
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/**
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* Uses a simple user-space spinlock to implement a condition variable. It is
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* usually not a good idea to use this implementation, unless you are building
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* Panda for a specific application on a specific SMP machine, and you are
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* confident that you have at least as many CPU's as you have threads.
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*/
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class EXPCL_PANDA_PIPELINE ConditionVarSpinlockImpl {
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public:
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INLINE ConditionVarSpinlockImpl(MutexSpinlockImpl &mutex);
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INLINE ~ConditionVarSpinlockImpl();
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void wait();
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void wait(double timeout);
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INLINE void notify();
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INLINE void notify_all();
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private:
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MutexSpinlockImpl &_mutex;
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TVOLATILE AtomicAdjust::Integer _event;
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};
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#include "conditionVarSpinlockImpl.I"
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#endif // MUTEX_SPINLOCK
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#endif
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