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reMutexHolder.I
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file reMutexHolder.I
10 * @author drose
11 * @date 2006-01-15
12 */
13
14/**
15 *
16 */
17INLINE ReMutexHolder::
18ReMutexHolder(const ReMutex &mutex) {
19#if defined(HAVE_THREADS) || defined(DEBUG_THREADS)
20 _mutex = &mutex;
21 _mutex->acquire();
22#endif
23}
24
25/**
26 * This variant on the constructor accepts the current thread as a parameter,
27 * if it is already known, as an optimization.
28 */
29INLINE ReMutexHolder::
30ReMutexHolder(const ReMutex &mutex, Thread *current_thread) {
31#if defined(HAVE_THREADS) || defined(DEBUG_THREADS)
32 _mutex = &mutex;
33 _mutex->acquire(current_thread);
34#endif
35}
36
37/**
38 * If the ReMutexHolder constructor is given a pointer to a ReMutex object
39 * (instead of an actual object), it will first check to see if the pointer is
40 * NULL, and allocate a new ReMutex if it is. This is intended as a
41 * convenience for functions that may need to reference a ReMutex at static
42 * init time, when it is impossible to guarantee ordering of initializers.
43 */
44INLINE ReMutexHolder::
45ReMutexHolder(ReMutex *&mutex) {
46#if defined(HAVE_THREADS) || defined(DEBUG_THREADS)
47 if (mutex == nullptr) {
48 mutex = new ReMutex;
49 }
50 _mutex = mutex;
51 _mutex->acquire();
52#endif
53}
54
55/**
56 *
57 */
58INLINE ReMutexHolder::
59~ReMutexHolder() {
60#if defined(HAVE_THREADS) || defined(DEBUG_THREADS)
61 _mutex->release();
62#endif
63}
void acquire() const
Grabs the reMutex if it is available.
A reentrant mutex.
Definition reMutex.h:34
A thread; that is, a lightweight process.
Definition thread.h:46