netatalk 4.4.3
Free and Open Source Apple Filing Protocol (AFP) Server
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ad_lock.h
Go to the documentation of this file.
1#ifndef LIBATALK_ADOUBLE_AD_PRIVATE_H
2#define LIBATALK_ADOUBLE_AD_PRIVATE_H 1
3
4#include <atalk/adouble.h>
5
6/* this is so that we can keep lists of fds referencing the same file
7 * around. that way, we can honor locks created by the same process
8 * with the same file. */
9
10#define adf_lock_init(a) do { \
11 (a)->adf_lockmax = 0; \
12 (a)->adf_lockcount = 0; \
13 (a)->adf_lock = NULL; \
14 } while (0)
15
16#define adf_lock_free(a) do { \
17 int i; \
18 if (!(a)->adf_lock) \
19 break; \
20 for (i = 0; i < (a)->adf_lockcount; i++) { \
21 adf_lock_t *lock = (a)->adf_lock + i; \
22 /* Always release fcntl lock when freeing array */ \
23 if ((a)->adf_fd >= 0) { \
24 lock->lock.l_type = F_UNLCK; \
25 if (fcntl((a)->adf_fd, F_SETLK, &lock->lock) == -1) { \
26 LOG(log_warning, logtype_default, \
27 "adf_lock_free: fcntl unlock failed on fd %d: %s", \
28 (a)->adf_fd, strerror(errno)); \
29 } \
30 } \
31 /* Only free refcount memory when last reference */ \
32 if (--(*lock->refcount) < 1) { \
33 free(lock->refcount); \
34 } \
35 } \
36 free((a)->adf_lock); \
37 adf_lock_init(a); \
38 } while (0)
39
40#endif /* libatalk/adouble/ad_private.h */
adouble.h
Part of Netatalk's AppleDouble implementatation.