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3d3ac840 | 1 | /* libc-internal interface for mutex locks. Stub version. |
0ed99ce4 | 2 | Copyright (C) 1996, 1997, 1999, 2000 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) |
0ed99ce4 | 32 | #define __libc_rwlock_define(CLASS,NAME) |
3d3ac840 RM |
33 | |
34 | /* Define an initialized lock variable NAME with storage class CLASS. */ | |
35 | #define __libc_lock_define_initialized(CLASS,NAME) | |
0ed99ce4 | 36 | #define __libc_rwlock_define_initialized(CLASS,NAME) |
3d3ac840 | 37 | |
df4ef2ab UD |
38 | /* Define an initialized recursive lock variable NAME with storage |
39 | class CLASS. */ | |
40 | #define __libc_lock_define_initialized_recursive(CLASS,NAME) | |
41 | ||
3d3ac840 RM |
42 | /* Initialize the named lock variable, leaving it in a consistent, unlocked |
43 | state. */ | |
44 | #define __libc_lock_init(NAME) | |
0ed99ce4 | 45 | #define __libc_rwlock_init(NAME) |
3d3ac840 | 46 | |
c6645251 UD |
47 | /* Same as last but this time we initialize a recursive mutex. */ |
48 | #define __libc_lock_init_recursive(NAME) | |
49 | ||
c1509239 RM |
50 | /* Finalize the named lock variable, which must be locked. It cannot be |
51 | used again until __libc_lock_init is called again on it. This must be | |
52 | called on a lock variable before the containing storage is reused. */ | |
53 | #define __libc_lock_fini(NAME) | |
0ed99ce4 | 54 | #define __libc_rwlock_fini(NAME) |
c1509239 | 55 | |
df4ef2ab UD |
56 | /* Finalize recursive named lock. */ |
57 | #define __libc_lock_fini_recursive(NAME) | |
58 | ||
3d3ac840 RM |
59 | /* Lock the named lock variable. */ |
60 | #define __libc_lock_lock(NAME) | |
0ed99ce4 UD |
61 | #define __libc_rwlock_rdlock(NAME) |
62 | #define __libc_rwlock_wrlock(NAME) | |
3d3ac840 | 63 | |
df4ef2ab UD |
64 | /* Lock the recursive named lock variable. */ |
65 | #define __libc_lock_lock_recursive(NAME) | |
66 | ||
67 | /* Try to lock the named lock variable. */ | |
68dbb3a6 | 68 | #define __libc_lock_trylock(NAME) 0 |
0ed99ce4 UD |
69 | #define __libc_rwlock_tryrdlock(NAME) 0 |
70 | #define __libc_rwlock_trywrlock(NAME) 0 | |
a18f587d | 71 | |
df4ef2ab UD |
72 | /* Try to lock the recursive named lock variable. */ |
73 | #define __libc_lock_trylock_recursive(NAME) 0 | |
74 | ||
3d3ac840 RM |
75 | /* Unlock the named lock variable. */ |
76 | #define __libc_lock_unlock(NAME) | |
0ed99ce4 | 77 | #define __libc_rwlock_unlock(NAME) |
3d3ac840 | 78 | |
df4ef2ab UD |
79 | /* Unlock the recursive named lock variable. */ |
80 | #define __libc_lock_unlock_recursive(NAME) | |
81 | ||
8f2ece69 UD |
82 | |
83 | /* Define once control variable. */ | |
0413b54c | 84 | #define __libc_once_define(CLASS, NAME) CLASS int NAME = 0 |
8f2ece69 UD |
85 | |
86 | /* Call handler iff the first call. */ | |
87 | #define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \ | |
88 | do { \ | |
89 | if ((ONCE_CONTROL) == 0) { \ | |
90 | INIT_FUNCTION (); \ | |
91 | (ONCE_CONTROL) = 1; \ | |
92 | } \ | |
93 | } while (0) | |
94 | ||
95 | ||
edf5b2d7 UD |
96 | /* Start critical region with cleanup. */ |
97 | #define __libc_cleanup_region_start(FCT, ARG) | |
98 | ||
99 | /* End critical region with cleanup. */ | |
100 | #define __libc_cleanup_region_end(DOIT) | |
101 | ||
66f8fa9b UD |
102 | /* Sometimes we have to exit the block in the middle. */ |
103 | #define __libc_cleanup_end(DOIT) | |
104 | ||
3d3ac840 | 105 | |
6d52618b | 106 | /* We need portable names for some of the functions. */ |
a18f587d UD |
107 | #define __libc_mutex_unlock |
108 | ||
ae1025be UD |
109 | /* Type for key of thread specific data. */ |
110 | typedef int __libc_key_t; | |
111 | ||
762a2918 | 112 | /* Create key for thread specific data. */ |
2d7da676 | 113 | #define __libc_key_create(KEY,DEST) -1 |
762a2918 UD |
114 | |
115 | /* Set thread-specific data associated with KEY to VAL. */ | |
2d7da676 | 116 | #define __libc_setspecific(KEY,VAL) -1 |
762a2918 UD |
117 | |
118 | /* Get thread-specific data associated with KEY. */ | |
119 | #define __libc_getspecific(KEY) 0 | |
120 | ||
5107cf1d | 121 | #endif /* bits/libc-lock.h */ |