79 lines
1.9 KiB
C
79 lines
1.9 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 lightMutexDirect.h
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* @author drose
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* @date 2008-10-08
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*/
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#ifndef LIGHTMUTEXDIRECT_H
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#define LIGHTMUTEXDIRECT_H
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#include "pandabase.h"
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#include "mutexImpl.h"
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#include "mutexTrueImpl.h"
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#include "pnotify.h"
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class Thread;
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#ifndef DEBUG_THREADS
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/**
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* This class implements a lightweight Mutex by making direct calls to the
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* underlying implementation layer. It doesn't perform any debugging
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* operations.
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*/
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class EXPCL_PANDA_PIPELINE LightMutexDirect {
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protected:
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LightMutexDirect() = default;
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LightMutexDirect(const LightMutexDirect ©) = delete;
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~LightMutexDirect() = default;
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void operator = (const LightMutexDirect ©) = delete;
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public:
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INLINE void lock();
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INLINE bool try_lock();
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INLINE void unlock();
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PUBLISHED:
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BLOCKING INLINE void acquire() const;
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INLINE void release() const;
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INLINE bool debug_is_locked() const;
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INLINE void set_name(const std::string &name);
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INLINE void clear_name();
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INLINE bool has_name() const;
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INLINE std::string get_name() const;
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void output(std::ostream &out) const;
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private:
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#ifdef DO_PSTATS
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// When PStats is compiled in, we use the full implementation of LightMutex,
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// even in the SIMPLE_THREADS case. We have to do this since any PStatTimer
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// call may trigger a context switch, and any low-level context switch
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// requires all containing mutexes to be true mutexes.
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mutable MutexTrueImpl _impl;
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#else
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mutable MutexImpl _impl;
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#endif // DO_PSTATS
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};
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INLINE std::ostream &
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operator << (std::ostream &out, const LightMutexDirect &m) {
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m.output(out);
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return out;
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}
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#include "lightMutexDirect.I"
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#endif // !DEBUG_THREADS
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#endif
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