67 lines
1.7 KiB
Text
67 lines
1.7 KiB
Text
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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 mutexHolder.I
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* @author drose
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* @date 2002-08-09
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*/
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/**
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*
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*/
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INLINE MutexHolder::
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MutexHolder(const Mutex &mutex) {
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#if defined(HAVE_THREADS) || defined(DEBUG_THREADS)
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_mutex = &mutex;
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_mutex->acquire();
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#endif
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}
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/**
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* This variant on the constructor accepts the current thread as a parameter,
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* if it is already known, as an optimization.
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*/
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INLINE MutexHolder::
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MutexHolder(const Mutex &mutex, Thread *current_thread) {
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#if defined(HAVE_THREADS) || defined(DEBUG_THREADS)
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_mutex = &mutex;
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// Actually, the regular Mutex class doesn't need the current thread
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// parameter at the moment. So not actually an optimization. But we keep
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// this method because it causes a symmetry with ReMutexHolder.
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_mutex->acquire(/*current_thread*/);
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#endif
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}
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/**
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* If the MutexHolder constructor is given a pointer to a Mutex object
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* (instead of an actual object), it will first check to see if the pointer is
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* NULL, and allocate a new Mutex if it is. This is intended as a convenience
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* for functions that may need to reference a Mutex at static init time, when
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* it is impossible to guarantee ordering of initializers.
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*/
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INLINE MutexHolder::
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MutexHolder(Mutex *&mutex) {
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#if defined(HAVE_THREADS) || defined(DEBUG_THREADS)
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if (mutex == nullptr) {
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mutex = new Mutex;
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}
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_mutex = mutex;
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_mutex->acquire();
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#endif
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}
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/**
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*
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*/
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INLINE MutexHolder::
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~MutexHolder() {
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#if defined(HAVE_THREADS) || defined(DEBUG_THREADS)
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_mutex->release();
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#endif
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}
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