projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d4697bc9 | 1 | /* Copyright (C) 2002-2014 Free Software Foundation, Inc. |
| 76a50749 UD |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 76a50749 | 18 | |
| fddfebbd | 19 | #include <semaphore.h> |
| 76a50749 UD |
20 | #include "pthreadP.h" |
| 21 | ||
| fddfebbd | 22 | |
| 76a50749 UD |
23 | /* Mount point of the shared memory filesystem. */ |
| 24 | struct mountpoint_info | |
| 25 | { | |
| 26 | char *dir; | |
| 27 | size_t dirlen; | |
| 28 | }; | |
| 29 | ||
| fddfebbd UD |
30 | /* Keeping track of currently used mappings. */ |
| 31 | struct inuse_sem | |
| 32 | { | |
| 33 | dev_t dev; | |
| 34 | ino_t ino; | |
| 35 | int refcnt; | |
| 36 | sem_t *sem; | |
| 37 | char name[0]; | |
| 38 | }; | |
| 39 | ||
| 76a50749 UD |
40 | |
| 41 | /* Variables used in multiple interfaces. */ | |
| 42 | extern struct mountpoint_info mountpoint attribute_hidden; | |
| 43 | ||
| 44 | extern pthread_once_t __namedsem_once attribute_hidden; | |
| 45 | ||
| fddfebbd UD |
46 | /* The search tree for existing mappings. */ |
| 47 | extern void *__sem_mappings attribute_hidden; | |
| 48 | ||
| 49 | /* Lock to protect the search tree. */ | |
| e51deae7 | 50 | extern int __sem_mappings_lock attribute_hidden; |
| fddfebbd | 51 | |
| 76a50749 UD |
52 | |
| 53 | /* Initializer for mountpoint. */ | |
| 54 | extern void __where_is_shmfs (void) attribute_hidden; | |
| 55 | ||
| fddfebbd UD |
56 | /* Comparison function for search in tree with existing mappings. */ |
| 57 | extern int __sem_search (const void *a, const void *b) attribute_hidden; | |
| 58 | ||
| 76a50749 UD |
59 | |
| 60 | /* Prototypes of functions with multiple interfaces. */ | |
| 61 | extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value); | |
| 3d2dd6ca | 62 | extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value); |
| 76a50749 UD |
63 | extern int __new_sem_destroy (sem_t *sem); |
| 64 | extern int __new_sem_post (sem_t *sem); | |
| 65 | extern int __new_sem_wait (sem_t *sem); | |
| 3d2dd6ca | 66 | extern int __old_sem_wait (sem_t *sem); |
| 76a50749 UD |
67 | extern int __new_sem_trywait (sem_t *sem); |
| 68 | extern int __new_sem_getvalue (sem_t *sem, int *sval); |