67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
// Filename: mutexSimpleImpl.h
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// Created by: drose (19Jun07)
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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 MUTEXSIMPLEIMPL_H
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#define MUTEXSIMPLEIMPL_H
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#include "pandabase.h"
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#include "selectThreadImpl.h"
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#ifdef THREAD_SIMPLE_IMPL
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#include "blockerSimple.h"
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#include "threadSimpleImpl.h"
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////////////////////////////////////////////////////////////////////
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// Class : MutexSimpleImpl
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// Description : This is the mutex implementation for the simple,
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// simulated threads case. It's designed to be as
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// lightweight as possible, of course. This
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// implementation simply yields the thread when the
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// mutex would block.
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//
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// We can't define this class in dtoolbase along with
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// the other mutex implementations, because this
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// implementation requires knowing about the
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// SimpleThreadManager. This complicates the
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// MutexDirect and MutexDebug definitions (we have to
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// define a MutexImpl, for code before pipeline to
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// use--which maps to MutexDummyImpl--and a
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// MutexTrueImpl, for code after pipeline to use--which
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// maps to this class, MutexSimpleImpl).
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA_PIPELINE MutexSimpleImpl : public BlockerSimple {
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public:
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INLINE MutexSimpleImpl();
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INLINE ~MutexSimpleImpl();
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INLINE void acquire();
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INLINE bool try_acquire();
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INLINE void release();
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INLINE void release_quietly();
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private:
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void do_acquire();
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void do_release();
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void do_release_quietly();
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friend class ThreadSimpleManager;
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};
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#include "mutexSimpleImpl.I"
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#endif // THREAD_SIMPLE_IMPL
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#endif
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