Mercurial > hg > CbC > CbC_gcc
comparison libgomp/config/posix/ptrlock.h @ 0:a06113de4d67
first commit
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
---|---|
date | Fri, 17 Jul 2009 14:47:48 +0900 |
parents | |
children | 04ced10e8804 |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:a06113de4d67 |
---|---|
1 /* Copyright (C) 2008, 2009 Free Software Foundation, Inc. | |
2 Contributed by Jakub Jelinek <jakub@redhat.com>. | |
3 | |
4 This file is part of the GNU OpenMP Library (libgomp). | |
5 | |
6 Libgomp is free software; you can redistribute it and/or modify it | |
7 under the terms of the GNU General Public License as published by | |
8 the Free Software Foundation; either version 3, or (at your option) | |
9 any later version. | |
10 | |
11 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 more details. | |
15 | |
16 Under Section 7 of GPL version 3, you are granted additional | |
17 permissions described in the GCC Runtime Library Exception, version | |
18 3.1, as published by the Free Software Foundation. | |
19 | |
20 You should have received a copy of the GNU General Public License and | |
21 a copy of the GCC Runtime Library Exception along with this program; | |
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 <http://www.gnu.org/licenses/>. */ | |
24 | |
25 /* This is a Linux specific implementation of a mutex synchronization | |
26 mechanism for libgomp. This type is private to the library. This | |
27 implementation uses atomic instructions and the futex syscall. */ | |
28 | |
29 #ifndef GOMP_PTRLOCK_H | |
30 #define GOMP_PTRLOCK_H 1 | |
31 | |
32 typedef struct { void *ptr; gomp_mutex_t lock; } gomp_ptrlock_t; | |
33 | |
34 static inline void gomp_ptrlock_init (gomp_ptrlock_t *ptrlock, void *ptr) | |
35 { | |
36 ptrlock->ptr = ptr; | |
37 gomp_mutex_init (&ptrlock->lock); | |
38 } | |
39 | |
40 static inline void *gomp_ptrlock_get (gomp_ptrlock_t *ptrlock) | |
41 { | |
42 if (ptrlock->ptr != NULL) | |
43 return ptrlock->ptr; | |
44 | |
45 gomp_mutex_lock (&ptrlock->lock); | |
46 if (ptrlock->ptr != NULL) | |
47 { | |
48 gomp_mutex_unlock (&ptrlock->lock); | |
49 return ptrlock->ptr; | |
50 } | |
51 | |
52 return NULL; | |
53 } | |
54 | |
55 static inline void gomp_ptrlock_set (gomp_ptrlock_t *ptrlock, void *ptr) | |
56 { | |
57 ptrlock->ptr = ptr; | |
58 gomp_mutex_unlock (&ptrlock->lock); | |
59 } | |
60 | |
61 static inline void gomp_ptrlock_destroy (gomp_ptrlock_t *ptrlock) | |
62 { | |
63 gomp_mutex_destroy (&ptrlock->lock); | |
64 } | |
65 | |
66 #endif /* GOMP_PTRLOCK_H */ |