Mercurial > hg > nginx

annotate src/core/ngx_shmtx.c @ 5742:c45c9812cf11

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Core: removed meaningless check from ngx_palloc_block(). The check became meaningless after refactoring in 2a92804f4109. With the loop currently in place, "current" can't be NULL, hence the check can be dropped. Additionally, the local variable "current" was removed to simplify code, and pool->current now used directly instead. Found by Coverity (CID 714236).
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 26 Jun 2014 03:34:19 +0400
parents 0fce5bb53b2d
children 74edc0ccf27a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
1
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
2 /*
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
3 * Copyright (C) Igor Sysoev
4412
d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
parents: 4315
diff changeset
4 * Copyright (C) Nginx, Inc.
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
5 */
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
6
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
7
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
8 #include <ngx_config.h>
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
9 #include <ngx_core.h>
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
10
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
11
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
12 #if (NGX_HAVE_ATOMIC_OPS)
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
13
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
14
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
15 static void ngx_shmtx_wakeup(ngx_shmtx_t *mtx);
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
16
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
17
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
18 ngx_int_t
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
19 ngx_shmtx_create(ngx_shmtx_t *mtx, ngx_shmtx_sh_t *addr, u_char *name)
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
20 {
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
21 mtx->lock = &addr->lock;
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
22
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
23 if (mtx->spin == (ngx_uint_t) -1) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
24 return NGX_OK;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
25 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
26
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
27 mtx->spin = 2048;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
28
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
29 #if (NGX_HAVE_POSIX_SEM)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
30
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
31 mtx->wait = &addr->wait;
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
32
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
33 if (sem_init(&mtx->sem, 1, 0) == -1) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
34 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
35 "sem_init() failed");
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
36 } else {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
37 mtx->semaphore = 1;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
38 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
39
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
40 #endif
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
41
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
42 return NGX_OK;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
43 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
44
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
45
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
46 void
4738
512c741fa841 Fixed typo in a function name.
Ruslan Ermilov <ru@nginx.com>
parents: 4412
diff changeset
47 ngx_shmtx_destroy(ngx_shmtx_t *mtx)
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
48 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
49 #if (NGX_HAVE_POSIX_SEM)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
50
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
51 if (mtx->semaphore) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
52 if (sem_destroy(&mtx->sem) == -1) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
53 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
54 "sem_destroy() failed");
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
55 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
56 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
57
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
58 #endif
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
59 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
60
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
61
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
62 ngx_uint_t
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
63 ngx_shmtx_trylock(ngx_shmtx_t *mtx)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
64 {
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
65 return (*mtx->lock == 0 && ngx_atomic_cmp_set(mtx->lock, 0, ngx_pid));
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
66 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
67
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
68
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
69 void
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
70 ngx_shmtx_lock(ngx_shmtx_t *mtx)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
71 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
72 ngx_uint_t i, n;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
73
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
74 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, "shmtx lock");
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
75
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
76 for ( ;; ) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
77
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
78 if (*mtx->lock == 0 && ngx_atomic_cmp_set(mtx->lock, 0, ngx_pid)) {
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
79 return;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
80 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
81
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
82 if (ngx_ncpu > 1) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
83
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
84 for (n = 1; n < mtx->spin; n <<= 1) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
85
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
86 for (i = 0; i < n; i++) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
87 ngx_cpu_pause();
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
88 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
89
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
90 if (*mtx->lock == 0
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
91 && ngx_atomic_cmp_set(mtx->lock, 0, ngx_pid))
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
92 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
93 return;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
94 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
95 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
96 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
97
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
98 #if (NGX_HAVE_POSIX_SEM)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
99
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
100 if (mtx->semaphore) {
4315
424a1ac6af43 Added (void) as we intentionally ignore returned values.
Maxim Dounin <mdounin@mdounin.ru>
parents: 4310
diff changeset
101 (void) ngx_atomic_fetch_add(mtx->wait, 1);
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
102
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
103 if (*mtx->lock == 0 && ngx_atomic_cmp_set(mtx->lock, 0, ngx_pid)) {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
104 return;
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
105 }
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
106
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
107 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
108 "shmtx wait %uA", *mtx->wait);
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
109
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
110 while (sem_wait(&mtx->sem) == -1) {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
111 ngx_err_t err;
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
112
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
113 err = ngx_errno;
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
114
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
115 if (err != NGX_EINTR) {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
116 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, err,
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
117 "sem_wait() failed while waiting on shmtx");
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
118 break;
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
119 }
4932
0fce5bb53b2d Fixed location of debug message in ngx_shmtx_lock().
Ruslan Ermilov <ru@nginx.com>
parents: 4738
diff changeset
120 }
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
121
4932
0fce5bb53b2d Fixed location of debug message in ngx_shmtx_lock().
Ruslan Ermilov <ru@nginx.com>
parents: 4738
diff changeset
122 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
0fce5bb53b2d Fixed location of debug message in ngx_shmtx_lock().
Ruslan Ermilov <ru@nginx.com>
parents: 4738
diff changeset
123 "shmtx awoke");
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
124
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
125 continue;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
126 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
127
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
128 #endif
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
129
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
130 ngx_sched_yield();
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
131 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
132 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
133
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
134
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
135 void
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
136 ngx_shmtx_unlock(ngx_shmtx_t *mtx)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
137 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
138 if (mtx->spin != (ngx_uint_t) -1) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
139 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, "shmtx unlock");
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
140 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
141
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
142 if (ngx_atomic_cmp_set(mtx->lock, ngx_pid, 0)) {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
143 ngx_shmtx_wakeup(mtx);
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
144 }
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
145 }
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
146
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
147
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
148 ngx_uint_t
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
149 ngx_shmtx_force_unlock(ngx_shmtx_t *mtx, ngx_pid_t pid)
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
150 {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
151 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
152 "shmtx forced unlock");
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
153
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
154 if (ngx_atomic_cmp_set(mtx->lock, pid, 0)) {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
155 ngx_shmtx_wakeup(mtx);
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
156 return 1;
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
157 }
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
158
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
159 return 0;
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
160 }
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
161
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
162
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
163 static void
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
164 ngx_shmtx_wakeup(ngx_shmtx_t *mtx)
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
165 {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
166 #if (NGX_HAVE_POSIX_SEM)
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
167 ngx_atomic_uint_t wait;
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
168
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
169 if (!mtx->semaphore) {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
170 return;
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
171 }
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
172
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
173 for ( ;; ) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
174
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
175 wait = *mtx->wait;
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
176
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
177 if (wait == 0) {
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
178 return;
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
179 }
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
180
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
181 if (ngx_atomic_cmp_set(mtx->wait, wait, wait - 1)) {
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
182 break;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
183 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
184 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
185
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
186 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
187 "shmtx wake %uA", wait);
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
188
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
189 if (sem_post(&mtx->sem) == -1) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
190 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
191 "sem_post() failed while wake shmtx");
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
192 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
193
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
194 #endif
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
195 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
196
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
197
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
198 #else
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
199
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
200
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
201 ngx_int_t
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
202 ngx_shmtx_create(ngx_shmtx_t *mtx, ngx_shmtx_sh_t *addr, u_char *name)
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
203 {
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
204 if (mtx->name) {
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
205
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
206 if (ngx_strcmp(name, mtx->name) == 0) {
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
207 mtx->name = name;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
208 return NGX_OK;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
209 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
210
4738
512c741fa841 Fixed typo in a function name.
Ruslan Ermilov <ru@nginx.com>
parents: 4412
diff changeset
211 ngx_shmtx_destroy(mtx);
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
212 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
213
1100
01884449985f fix building on platforms with non-supported atomic operations
Igor Sysoev <igor@sysoev.ru>
parents: 860
diff changeset
214 mtx->fd = ngx_open_file(name, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN,
01884449985f fix building on platforms with non-supported atomic operations
Igor Sysoev <igor@sysoev.ru>
parents: 860
diff changeset
215 NGX_FILE_DEFAULT_ACCESS);
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
216
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
217 if (mtx->fd == NGX_INVALID_FILE) {
860
201d017ea470 slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents: 611
diff changeset
218 ngx_log_error(NGX_LOG_EMERG, ngx_cycle->log, ngx_errno,
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
219 ngx_open_file_n " \"%s\" failed", name);
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
220 return NGX_ERROR;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
221 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
222
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
223 if (ngx_delete_file(name) == NGX_FILE_ERROR) {
860
201d017ea470 slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents: 611
diff changeset
224 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
225 ngx_delete_file_n " \"%s\" failed", name);
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
226 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
227
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
228 mtx->name = name;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
229
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
230 return NGX_OK;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
231 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
232
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
233
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
234 void
4738
512c741fa841 Fixed typo in a function name.
Ruslan Ermilov <ru@nginx.com>
parents: 4412
diff changeset
235 ngx_shmtx_destroy(ngx_shmtx_t *mtx)
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
236 {
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
237 if (ngx_close_file(mtx->fd) == NGX_FILE_ERROR) {
860
201d017ea470 slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents: 611
diff changeset
238 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
239 ngx_close_file_n " \"%s\" failed", mtx->name);
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
240 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
241 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
242
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
243
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
244 ngx_uint_t
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
245 ngx_shmtx_trylock(ngx_shmtx_t *mtx)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
246 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
247 ngx_err_t err;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
248
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
249 err = ngx_trylock_fd(mtx->fd);
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
250
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
251 if (err == 0) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
252 return 1;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
253 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
254
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
255 if (err == NGX_EAGAIN) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
256 return 0;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
257 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
258
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
259 #if __osf__ /* Tru64 UNIX */
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
260
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
261 if (err == NGX_EACCESS) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
262 return 0;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
263 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
264
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
265 #endif
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
266
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
267 ngx_log_abort(err, ngx_trylock_fd_n " %s failed", mtx->name);
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
268
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
269 return 0;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
270 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
271
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
272
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
273 void
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
274 ngx_shmtx_lock(ngx_shmtx_t *mtx)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
275 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
276 ngx_err_t err;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
277
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
278 err = ngx_lock_fd(mtx->fd);
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
279
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
280 if (err == 0) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
281 return;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
282 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
283
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
284 ngx_log_abort(err, ngx_lock_fd_n " %s failed", mtx->name);
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
285 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
286
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
287
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
288 void
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
289 ngx_shmtx_unlock(ngx_shmtx_t *mtx)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
290 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
291 ngx_err_t err;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
292
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
293 err = ngx_unlock_fd(mtx->fd);
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
294
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
295 if (err == 0) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
296 return;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
297 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
298
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
299 ngx_log_abort(err, ngx_unlock_fd_n " %s failed", mtx->name);
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
300 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
301
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
302
4310
13f108b9f3cf Fixed build without atomic operations.
Maxim Dounin <mdounin@mdounin.ru>
parents: 4309
diff changeset
303 ngx_uint_t
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
304 ngx_shmtx_force_unlock(ngx_shmtx_t *mtx, ngx_pid_t pid)
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
305 {
4310
13f108b9f3cf Fixed build without atomic operations.
Maxim Dounin <mdounin@mdounin.ru>
parents: 4309
diff changeset
306 return 0;
4309
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
307 }
3f6040cd731e Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3909
diff changeset
308
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
309 #endif