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
|
/* nbdkit
* Copyright Red Hat
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Red Hat nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef NBDKIT_CLEANUP_H
#define NBDKIT_CLEANUP_H
#ifdef __cplusplus
extern "C" {
#endif
#include <pthread.h>
#include <assert.h>
#include "unique-name.h"
/* Work around clang bug: https://bugs.llvm.org/show_bug.cgi?id=43482 */
#ifdef __clang__
#define CLANG_UNUSED_VARIABLE_WORKAROUND __attribute__ ((__unused__))
#else
#define CLANG_UNUSED_VARIABLE_WORKAROUND
#endif
/* cleanup.c */
extern void cleanup_free (void *ptr);
#define CLEANUP_FREE __attribute__ ((cleanup (cleanup_free)))
extern void cleanup_mutex_unlock (pthread_mutex_t **ptr);
#define CLEANUP_MUTEX_UNLOCK __attribute__ ((cleanup (cleanup_mutex_unlock)))
#define ACQUIRE_LOCK_FOR_CURRENT_SCOPE(mutex) \
ACQUIRE_LOCK_FOR_CURRENT_SCOPE_1 ((mutex), NBDKIT_UNIQUE_NAME (_lock))
#define ACQUIRE_LOCK_FOR_CURRENT_SCOPE_1(mutex, lock) \
CLEANUP_MUTEX_UNLOCK pthread_mutex_t *lock = mutex; \
do { \
int _r = pthread_mutex_lock (lock); \
assert (!_r); \
} while (0)
extern void cleanup_rwlock_unlock (pthread_rwlock_t **ptr);
#define CLEANUP_RWLOCK_UNLOCK __attribute__ ((cleanup (cleanup_rwlock_unlock)))
#define ACQUIRE_WRLOCK_FOR_CURRENT_SCOPE(rwlock) \
ACQUIRE_WRLOCK_FOR_CURRENT_SCOPE_1 ((rwlock), NBDKIT_UNIQUE_NAME (_lock))
#define ACQUIRE_WRLOCK_FOR_CURRENT_SCOPE_1(rwlock, lock) \
CLEANUP_RWLOCK_UNLOCK pthread_rwlock_t *lock = rwlock; \
do { \
int _r = pthread_rwlock_wrlock (lock); \
assert (!_r); \
} while (0)
#define ACQUIRE_RDLOCK_FOR_CURRENT_SCOPE(rwlock) \
ACQUIRE_RDLOCK_FOR_CURRENT_SCOPE_1 ((rwlock), NBDKIT_UNIQUE_NAME (_lock))
#define ACQUIRE_RDLOCK_FOR_CURRENT_SCOPE_1(rwlock, lock) \
CLEANUP_RWLOCK_UNLOCK pthread_rwlock_t *lock = rwlock; \
do { \
int _r = pthread_rwlock_rdlock (lock); \
assert (!_r); \
} while (0)
/* cleanup-nbdkit.c */
struct nbdkit_extents;
extern void cleanup_extents_free (struct nbdkit_extents **ptr);
#define CLEANUP_EXTENTS_FREE __attribute__ ((cleanup (cleanup_extents_free)))
struct nbdkit_exports;
extern void cleanup_exports_free (struct nbdkit_exports **ptr);
#define CLEANUP_EXPORTS_FREE __attribute__ ((cleanup (cleanup_exports_free)))
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* NBDKIT_CLEANUP_H */
|
