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annotate src/core/ngx_shmtx.c @ 3992:a1dd9dc754ab

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A new fix for the case when ssl_session_cache defined, but ssl is not enabled in any server. The previous r1033 does not help when unused zone becomes used after reconfiguration, so it is backed out. The initial thought was to make SSL modules independed from SSL implementation and to keep OpenSSL code dependance as much as in separate files.
author Igor Sysoev <igor@sysoev.ru>
date Thu, 04 Aug 2011 11:12:30 +0000
parents 0daede16d68b
children 3f6040cd731e 4919fb357a5d
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9
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11 #if (NGX_HAVE_ATOMIC_OPS)
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14 ngx_int_t
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15 ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name)
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16 {
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17 mtx->lock = addr;
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18
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19 if (mtx->spin == (ngx_uint_t) -1) {
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20 return NGX_OK;
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21 }
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22
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23 mtx->spin = 2048;
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24
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25 #if (NGX_HAVE_POSIX_SEM)
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26
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27 if (sem_init(&mtx->sem, 1, 0) == -1) {
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28 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
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29 "sem_init() failed");
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30 } else {
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31 mtx->semaphore = 1;
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32 }
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33
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34 #endif
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35
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36 return NGX_OK;
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37 }
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39
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40 void
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41 ngx_shmtx_destory(ngx_shmtx_t *mtx)
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42 {
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43 #if (NGX_HAVE_POSIX_SEM)
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44
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45 if (mtx->semaphore) {
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46 if (sem_destroy(&mtx->sem) == -1) {
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47 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
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48 "sem_destroy() failed");
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49 }
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50 }
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51
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52 #endif
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53 }
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54
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55
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56 ngx_uint_t
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57 ngx_shmtx_trylock(ngx_shmtx_t *mtx)
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58 {
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59 ngx_atomic_uint_t val;
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60
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61 val = *mtx->lock;
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62
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63 return ((val & 0x80000000) == 0
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64 && ngx_atomic_cmp_set(mtx->lock, val, val | 0x80000000));
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65 }
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66
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67
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68 void
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69 ngx_shmtx_lock(ngx_shmtx_t *mtx)
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70 {
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71 ngx_uint_t i, n;
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72 ngx_atomic_uint_t val;
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73
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74 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, "shmtx lock");
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75
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76 for ( ;; ) {
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77
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78 val = *mtx->lock;
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79
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80 if ((val & 0x80000000) == 0
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81 && ngx_atomic_cmp_set(mtx->lock, val, val | 0x80000000))
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82 {
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83 return;
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84 }
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85
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86 if (ngx_ncpu > 1) {
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87
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88 for (n = 1; n < mtx->spin; n <<= 1) {
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89
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90 for (i = 0; i < n; i++) {
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91 ngx_cpu_pause();
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92 }
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93
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94 val = *mtx->lock;
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95
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96 if ((val & 0x80000000) == 0
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97 && ngx_atomic_cmp_set(mtx->lock, val, val | 0x80000000))
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98 {
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99 return;
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100 }
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101 }
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102 }
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103
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104 #if (NGX_HAVE_POSIX_SEM)
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105
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106 if (mtx->semaphore) {
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107 val = *mtx->lock;
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108
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109 if ((val & 0x80000000)
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110 && ngx_atomic_cmp_set(mtx->lock, val, val + 1))
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111 {
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112 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
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113 "shmtx wait %XA", val);
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114
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115 while (sem_wait(&mtx->sem) == -1) {
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116 ngx_err_t err;
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117
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118 err = ngx_errno;
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119
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120 if (err != NGX_EINTR) {
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121 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, err,
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122 "sem_wait() failed while waiting on shmtx");
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123 break;
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124 }
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125 }
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126
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127 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
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128 "shmtx awoke");
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129 }
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130
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parents: 1100
diff changeset
131 continue;
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 #endif
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
135
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
136 ngx_sched_yield();
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 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
139
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 void
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
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parents: 1100
diff changeset
142 ngx_shmtx_unlock(ngx_shmtx_t *mtx)
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Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
143 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
144 ngx_atomic_uint_t val, old, wait;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
145
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
146 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
147 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
148 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
149
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
150 for ( ;; ) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
151
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
152 old = *mtx->lock;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
153 wait = old & 0x7fffffff;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
154 val = wait ? wait - 1 : 0;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
155
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
156 if (ngx_atomic_cmp_set(mtx->lock, old, val)) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
157 break;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
158 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
159 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
160
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
161 #if (NGX_HAVE_POSIX_SEM)
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
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parents: 1100
diff changeset
162
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
163 if (wait == 0 || !mtx->semaphore) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
164 return;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
165 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
166
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
167 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
168 "shmtx wake %XA", old);
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
169
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
170 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
171 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
172 "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
173 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
174
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
175 #endif
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
176 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
177
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
178
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
179 #else
3f8a2132b93d nginx-0.3.27-RELEASE import
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parents:
diff changeset
180
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
181
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
182 ngx_int_t
860
201d017ea470 slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents: 611
diff changeset
183 ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name)
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
184 {
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
185 if (mtx->name) {
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
186
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
187 if (ngx_strcmp(name, mtx->name) == 0) {
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
188 mtx->name = name;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
189 return NGX_OK;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
190 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
191
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
192 ngx_shmtx_destory(mtx);
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
193 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
194
1100
01884449985f fix building on platforms with non-supported atomic operations
Igor Sysoev <igor@sysoev.ru>
parents: 860
diff changeset
195 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
196 NGX_FILE_DEFAULT_ACCESS);
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
197
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
198 if (mtx->fd == NGX_INVALID_FILE) {
860
201d017ea470 slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents: 611
diff changeset
199 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
200 ngx_open_file_n " \"%s\" failed", name);
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
201 return NGX_ERROR;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
202 }
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 (ngx_delete_file(name) == NGX_FILE_ERROR) {
860
201d017ea470 slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents: 611
diff changeset
205 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
206 ngx_delete_file_n " \"%s\" failed", name);
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
207 }
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
208
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
209 mtx->name = name;
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
210
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
211 return NGX_OK;
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
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
214
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
215 void
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
216 ngx_shmtx_destory(ngx_shmtx_t *mtx)
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
217 {
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
218 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
219 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
220 ngx_close_file_n " \"%s\" failed", mtx->name);
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
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
224
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
225 ngx_uint_t
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
226 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
227 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
228 ngx_err_t err;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
229
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
230 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
231
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
232 if (err == 0) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
233 return 1;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
234 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
235
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
236 if (err == NGX_EAGAIN) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
237 return 0;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
238 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
239
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
240 #if __osf__ /* Tru64 UNIX */
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
241
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
242 if (err == NGX_EACCESS) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
243 return 0;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
244 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
245
611
3f8a2132b93d nginx-0.3.27-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
246 #endif
3909
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
247
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
248 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
249
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
250 return 0;
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
251 }
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
252
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 void
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
255 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
256 {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
257 ngx_err_t err;
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 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
260
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
261 if (err == 0) {
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
262 return;
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
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
265 ngx_log_abort(err, ngx_lock_fd_n " %s failed", mtx->name);
0daede16d68b use POSIX semaphores in shmtx instead of sched_yield()
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parents: 1100
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266 }
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267
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268
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269 void
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270 ngx_shmtx_unlock(ngx_shmtx_t *mtx)
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271 {
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272 ngx_err_t err;
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273
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274 err = ngx_unlock_fd(mtx->fd);
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275
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276 if (err == 0) {
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277 return;
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278 }
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279
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280 ngx_log_abort(err, ngx_unlock_fd_n " %s failed", mtx->name);
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281 }
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282
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283 #endif