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3d3ac840 | 1 | /* libc-internal interface for mutex locks. Stub version. |
9e9f1f15 | 2 | Copyright (C) 1996,97,99,2000-2002,2003 Free Software Foundation, Inc. |
54d79e99 | 3 | This file is part of the GNU C Library. |
3d3ac840 | 4 | |
54d79e99 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
3d3ac840 | 9 | |
54d79e99 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
3d3ac840 | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
3d3ac840 | 19 | |
5107cf1d UD |
20 | #ifndef _BITS_LIBC_LOCK_H |
21 | #define _BITS_LIBC_LOCK_H 1 | |
3d3ac840 RM |
22 | |
23 | ||
24 | /* Define a lock variable NAME with storage class CLASS. The lock must be | |
25 | initialized with __libc_lock_init before it can be used (or define it | |
26 | with __libc_lock_define_initialized, below). Use `extern' for CLASS to | |
c1509239 | 27 | declare a lock defined in another module. In public structure |
c4029823 UD |
28 | definitions you must use a pointer to the lock structure (i.e., NAME |
29 | begins with a `*'), because its storage size will not be known outside | |
30 | of libc. */ | |
3d3ac840 | 31 | #define __libc_lock_define(CLASS,NAME) |
c12aa801 | 32 | #define __libc_lock_define_recursive(CLASS,NAME) |
d3c9f895 | 33 | #define __rtld_lock_define_recursive(CLASS,NAME) |
0ed99ce4 | 34 | #define __libc_rwlock_define(CLASS,NAME) |
3d3ac840 RM |
35 | |
36 | /* Define an initialized lock variable NAME with storage class CLASS. */ | |
37 | #define __libc_lock_define_initialized(CLASS,NAME) | |
0ed99ce4 | 38 | #define __libc_rwlock_define_initialized(CLASS,NAME) |
3d3ac840 | 39 | |
df4ef2ab UD |
40 | /* Define an initialized recursive lock variable NAME with storage |
41 | class CLASS. */ | |
42 | #define __libc_lock_define_initialized_recursive(CLASS,NAME) | |
9e9f1f15 | 43 | #define __rtld_lock_define_initialized_recursive(CLASS,NAME) |
df4ef2ab | 44 | |
3d3ac840 RM |
45 | /* Initialize the named lock variable, leaving it in a consistent, unlocked |
46 | state. */ | |
47 | #define __libc_lock_init(NAME) | |
0ed99ce4 | 48 | #define __libc_rwlock_init(NAME) |
3d3ac840 | 49 | |
c6645251 UD |
50 | /* Same as last but this time we initialize a recursive mutex. */ |
51 | #define __libc_lock_init_recursive(NAME) | |
d3c9f895 | 52 | #define __rtld_lock_init_recursive(NAME) |
c6645251 | 53 | |
c1509239 RM |
54 | /* Finalize the named lock variable, which must be locked. It cannot be |
55 | used again until __libc_lock_init is called again on it. This must be | |
56 | called on a lock variable before the containing storage is reused. */ | |
57 | #define __libc_lock_fini(NAME) | |
0ed99ce4 | 58 | #define __libc_rwlock_fini(NAME) |
c1509239 | 59 | |
df4ef2ab UD |
60 | /* Finalize recursive named lock. */ |
61 | #define __libc_lock_fini_recursive(NAME) | |
62 | ||
3d3ac840 RM |
63 | /* Lock the named lock variable. */ |
64 | #define __libc_lock_lock(NAME) | |
0ed99ce4 UD |
65 | #define __libc_rwlock_rdlock(NAME) |
66 | #define __libc_rwlock_wrlock(NAME) | |
3d3ac840 | 67 | |
df4ef2ab UD |
68 | /* Lock the recursive named lock variable. */ |
69 | #define __libc_lock_lock_recursive(NAME) | |
d3c9f895 | 70 | #define __rtld_lock_lock_recursive(NAME) |
df4ef2ab UD |
71 | |
72 | /* Try to lock the named lock variable. */ | |
68dbb3a6 | 73 | #define __libc_lock_trylock(NAME) 0 |
0ed99ce4 UD |
74 | #define __libc_rwlock_tryrdlock(NAME) 0 |
75 | #define __libc_rwlock_trywrlock(NAME) 0 | |
a18f587d | 76 | |
df4ef2ab UD |
77 | /* Try to lock the recursive named lock variable. */ |
78 | #define __libc_lock_trylock_recursive(NAME) 0 | |
79 | ||
3d3ac840 RM |
80 | /* Unlock the named lock variable. */ |
81 | #define __libc_lock_unlock(NAME) | |
0ed99ce4 | 82 | #define __libc_rwlock_unlock(NAME) |
3d3ac840 | 83 | |
df4ef2ab UD |
84 | /* Unlock the recursive named lock variable. */ |
85 | #define __libc_lock_unlock_recursive(NAME) | |
d3c9f895 | 86 | #define __rtld_lock_unlock_recursive(NAME) |
df4ef2ab | 87 | |
8f2ece69 UD |
88 | |
89 | /* Define once control variable. */ | |
0413b54c | 90 | #define __libc_once_define(CLASS, NAME) CLASS int NAME = 0 |
8f2ece69 UD |
91 | |
92 | /* Call handler iff the first call. */ | |
93 | #define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \ | |
94 | do { \ | |
95 | if ((ONCE_CONTROL) == 0) { \ | |
96 | INIT_FUNCTION (); \ | |
97 | (ONCE_CONTROL) = 1; \ | |
98 | } \ | |
99 | } while (0) | |
100 | ||
101 | ||
edb63884 RM |
102 | /* Start a critical region with a cleanup function */ |
103 | #define __libc_cleanup_region_start(DOIT, FCT, ARG) \ | |
104 | { \ | |
105 | typeof (***(FCT)) *__save_FCT = (DOIT) ? (FCT) : 0; \ | |
106 | typeof (ARG) __save_ARG = ARG; \ | |
107 | /* close brace is in __libc_cleanup_region_end below. */ | |
108 | ||
109 | /* End a critical region started with __libc_cleanup_region_start. */ | |
110 | #define __libc_cleanup_region_end(DOIT) \ | |
111 | if ((DOIT) && __save_FCT != 0) \ | |
112 | (*__save_FCT)(__save_ARG); \ | |
113 | } | |
edf5b2d7 | 114 | |
66f8fa9b | 115 | /* Sometimes we have to exit the block in the middle. */ |
edb63884 RM |
116 | #define __libc_cleanup_end(DOIT) \ |
117 | if ((DOIT) && __save_FCT != 0) \ | |
118 | (*__save_FCT)(__save_ARG); \ | |
66f8fa9b | 119 | |
3d3ac840 | 120 | |
6d52618b | 121 | /* We need portable names for some of the functions. */ |
a18f587d UD |
122 | #define __libc_mutex_unlock |
123 | ||
ae1025be UD |
124 | /* Type for key of thread specific data. */ |
125 | typedef int __libc_key_t; | |
126 | ||
762a2918 | 127 | /* Create key for thread specific data. */ |
2d7da676 | 128 | #define __libc_key_create(KEY,DEST) -1 |
762a2918 UD |
129 | |
130 | /* Set thread-specific data associated with KEY to VAL. */ | |
ffa8d2a0 | 131 | #define __libc_setspecific(KEY,VAL) ((void)0) |
762a2918 UD |
132 | |
133 | /* Get thread-specific data associated with KEY. */ | |
134 | #define __libc_getspecific(KEY) 0 | |
135 | ||
5107cf1d | 136 | #endif /* bits/libc-lock.h */ |