projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 748086b7 | 1 | /* Copyright (C) 2008, 2009 Free Software Foundation, Inc. |
| a68ab351 JJ |
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 | |
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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. | |
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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 | |
| 748086b7 | 13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| a68ab351 JJ |
14 | more details. |
| 15 | ||
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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. | |
| a68ab351 | 19 | |
| 748086b7 JJ |
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/>. */ | |
| a68ab351 JJ |
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 */ |