Panda3D
dtool
src
dtoolbase
mutexSpinlockImpl.cxx
Go to the documentation of this file.
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 mutexSpinlockImpl.cxx
10
* @author drose
11
* @date 2006-04-11
12
*/
13
14
#include "
selectThreadImpl.h
"
15
16
#ifdef MUTEX_SPINLOCK
17
18
#include "
mutexSpinlockImpl.h
"
19
20
#if defined(__i386__) || defined(__x86_64) || defined(_M_IX86) || defined(_M_X64)
21
#include <emmintrin.h>
22
#define PAUSE() _mm_pause()
23
#else
24
#define PAUSE()
25
#endif
26
27
/**
28
*
29
*/
30
void
MutexSpinlockImpl::
31
do_lock() {
32
// Loop until we changed the flag from 0 to 1 (and it wasn't already 1).
33
while
(_flag.test_and_set(std::memory_order_acquire)) {
34
PAUSE();
35
}
36
}
37
38
#endif // MUTEX_SPINLOCK
selectThreadImpl.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
mutexSpinlockImpl.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
Generated on Sat Jan 11 2020 15:14:38 for Panda3D by
1.8.17