101 lines
3.5 KiB
Plaintext
101 lines
3.5 KiB
Plaintext
// Filename: mutexHolder.I
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// Created by: drose (09Aug02)
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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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////////////////////////////////////////////////////////////////////
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// Function: MutexHolder::Constructor
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// Access: Public
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// Description:
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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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// Function: MutexHolder::Constructor
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// Access: Public
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// Description: This variant on the constructor accepts the current
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// thread as a parameter, if it is already known, as an
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// 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
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// we keep this method because it causes a symmetry with
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// 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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// Function: MutexHolder::Constructor
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// Access: Public
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// Description: If the MutexHolder constructor is given a pointer to
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// a Mutex object (instead of an actual object), it will
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// first check to see if the pointer is NULL, and
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// allocate a new Mutex if it is. This is intended as a
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// convenience for functions that may need to reference
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// a Mutex at static init time, when it is impossible to
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// 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 == (Mutex *)NULL) {
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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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// Function: MutexHolder::Destructor
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// Access: Public
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// Description:
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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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////////////////////////////////////////////////////////////////////
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// Function: MutexHolder::Copy Constructor
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// Access: Private
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// Description: Do not attempt to copy MutexHolders.
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////////////////////////////////////////////////////////////////////
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INLINE MutexHolder::
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MutexHolder(const MutexHolder ©) {
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nassertv(false);
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}
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////////////////////////////////////////////////////////////////////
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// Function: MutexHolder::Copy Assignment Operator
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// Access: Private
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// Description: Do not attempt to copy MutexHolders.
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////////////////////////////////////////////////////////////////////
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INLINE void MutexHolder::
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operator = (const MutexHolder ©) {
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nassertv(false);
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}
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