1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/* libc-internal interface for mutex locks. Stub version.
Copyright (C) 1996-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _LIBC_LOCK_H
#define _LIBC_LOCK_H 1
/* Define a lock variable NAME with storage class CLASS. The lock must be
initialized with __libc_lock_init before it can be used (or define it
with __libc_lock_define_initialized, below). Use `extern' for CLASS to
declare a lock defined in another module. In public structure
definitions you must use a pointer to the lock structure (i.e., NAME
begins with a `*'), because its storage size will not be known outside
of libc. */
#define __libc_lock_define(CLASS,NAME)
#define __libc_lock_define_recursive(CLASS,NAME)
#define __rtld_lock_define_recursive(CLASS,NAME)
#define __libc_rwlock_define(CLASS,NAME)
/* Define an initialized lock variable NAME with storage class CLASS. */
#define __libc_lock_define_initialized(CLASS,NAME)
#define __libc_rwlock_define_initialized(CLASS,NAME)
/* Define an initialized recursive lock variable NAME with storage
class CLASS. */
#define __libc_lock_define_initialized_recursive(CLASS,NAME)
#define __rtld_lock_define_initialized_recursive(CLASS,NAME)
/* Initialize the named lock variable, leaving it in a consistent, unlocked
state. */
#define __libc_lock_init(NAME)
#define __rtld_lock_initialize(NAME)
#define __libc_rwlock_init(NAME)
/* Same as last but this time we initialize a recursive mutex. */
#define __libc_lock_init_recursive(NAME)
/* Finalize the named lock variable, which must be locked. It cannot be
used again until __libc_lock_init is called again on it. This must be
called on a lock variable before the containing storage is reused. */
#define __libc_lock_fini(NAME)
#define __libc_rwlock_fini(NAME)
/* Finalize recursive named lock. */
#define __libc_lock_fini_recursive(NAME)
/* Lock the named lock variable. */
#define __libc_lock_lock(NAME)
#define __libc_rwlock_rdlock(NAME)
#define __libc_rwlock_wrlock(NAME)
/* Lock the recursive named lock variable. */
#define __libc_lock_lock_recursive(NAME)
#define __rtld_lock_lock_recursive(NAME)
/* Try to lock the named lock variable. */
#define __libc_lock_trylock(NAME) 0
#define __libc_rwlock_tryrdlock(NAME) 0
#define __libc_rwlock_trywrlock(NAME) 0
/* Try to lock the recursive named lock variable. */
#define __libc_lock_trylock_recursive(NAME) 0
/* Unlock the named lock variable. */
#define __libc_lock_unlock(NAME)
#define __libc_rwlock_unlock(NAME)
/* Unlock the recursive named lock variable. */
#define __libc_lock_unlock_recursive(NAME)
#define __rtld_lock_unlock_recursive(NAME)
/* Define once control variable. */
#define __libc_once_define(CLASS, NAME) CLASS int NAME = 0
/* Call handler iff the first call. */
#define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \
do { \
if ((ONCE_CONTROL) == 0) { \
INIT_FUNCTION (); \
(ONCE_CONTROL) = 1; \
} \
} while (0)
/* Get once control variable. */
#define __libc_once_get(ONCE_CONTROL) \
((ONCE_CONTROL) == 1)
/* Start a critical region with a cleanup function */
#define __libc_cleanup_region_start(DOIT, FCT, ARG) \
{ \
typeof (***(FCT)) *__save_FCT = (DOIT) ? (FCT) : 0; \
typeof (ARG) __save_ARG = ARG; \
/* close brace is in __libc_cleanup_region_end below. */
/* End a critical region started with __libc_cleanup_region_start. */
#define __libc_cleanup_region_end(DOIT) \
if ((DOIT) && __save_FCT != 0) \
(*__save_FCT)(__save_ARG); \
}
/* Sometimes we have to exit the block in the middle. */
#define __libc_cleanup_end(DOIT) \
if ((DOIT) && __save_FCT != 0) \
(*__save_FCT)(__save_ARG); \
#define __libc_cleanup_push(fct, arg) __libc_cleanup_region_start (1, fct, arg)
#define __libc_cleanup_pop(execute) __libc_cleanup_region_end (execute)
/* We need portable names for some of the functions. */
#define __libc_mutex_unlock
/* Type for key of thread specific data. */
typedef int __libc_key_t;
/* Create key for thread specific data. */
#define __libc_key_create(KEY,DEST) ((void) (KEY), (void) (DEST), -1)
/* Set thread-specific data associated with KEY to VAL. */
#define __libc_setspecific(KEY,VAL) ((void) (KEY), (void) (VAL))
/* Get thread-specific data associated with KEY. */
#define __libc_getspecific(KEY) ((void) (KEY), (void *) 0)
#endif /* libc-lock.h */
|
