1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/* Linuxthreads - a simple clone()-based implementation of Posix */
/* threads for Linux. */
/* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */
/* */
/* This program is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU Library General Public License */
/* as published by the Free Software Foundation; either version 2 */
/* of the License, or (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU Library General Public License for more details. */
/* Internal locks */
extern void __pthread_lock(struct _pthread_fastlock * lock);
extern int __pthread_trylock(struct _pthread_fastlock * lock);
extern void __pthread_unlock(struct _pthread_fastlock * lock);
static inline void __pthread_init_lock(struct _pthread_fastlock * lock)
{
lock->status = 0;
lock->spinlock = 0;
}
#define LOCK_INITIALIZER {0, 0}
#if defined(TEST_FOR_COMPARE_AND_SWAP)
extern int __pthread_has_cas;
extern int __pthread_compare_and_swap(long * ptr, long oldval, long newval,
int * spinlock);
static inline int compare_and_swap(long * ptr, long oldval, long newval,
int * spinlock)
{
if (__pthread_has_cas)
return __compare_and_swap(ptr, oldval, newval);
else
return __pthread_compare_and_swap(ptr, oldval, newval, spinlock);
}
#elif defined(HAS_COMPARE_AND_SWAP)
static inline int compare_and_swap(long * ptr, long oldval, long newval,
int * spinlock)
{
return __compare_and_swap(ptr, oldval, newval);
}
#else
extern int __pthread_compare_and_swap(long * ptr, long oldval, long newval,
int * spinlock);
static inline int compare_and_swap(long * ptr, long oldval, long newval,
int * spinlock)
{
return __pthread_compare_and_swap(ptr, oldval, newval, spinlock);
}
#endif
|
