60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// Filename: conditionVarWin32Impl.h
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// Created by: drose (07Feb06)
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//
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////////////////////////////////////////////////////////////////////
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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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////////////////////////////////////////////////////////////////////
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#ifndef CONDITIONVARWIN32IMPL_H
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#define CONDITIONVARWIN32IMPL_H
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#include "pandabase.h"
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#include "selectThreadImpl.h"
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#ifdef WIN32_VC
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#include "mutexWin32Impl.h"
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#include "pnotify.h"
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class MutexWin32Impl;
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////////////////////////////////////////////////////////////////////
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// Class : ConditionVarWin32Impl
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// Description : Uses Windows native calls to implement a
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// conditionVar.
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//
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// The Windows native synchronization primitives don't
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// actually implement a full POSIX-style condition
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// variable, but the Event primitive does a fair job if
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// we disallow signal_all() (POSIX broadcast). See
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// ConditionVarFullWin32Impl for a full implementation
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// that includes signal_all(). This class is much
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// simpler than that full implementation, so we can
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// avoid the overhead required to support broadcast.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA_PIPELINE ConditionVarWin32Impl {
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public:
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INLINE ConditionVarWin32Impl(MutexWin32Impl &mutex);
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INLINE ~ConditionVarWin32Impl();
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INLINE void wait();
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INLINE void signal();
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private:
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CRITICAL_SECTION *_external_mutex;
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HANDLE _event_signal;
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};
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#include "conditionVarWin32Impl.I"
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#endif // WIN32_VC
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#endif
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