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annotate src/core/ngx_shmtx.c @ 3928:105841a157b9

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fix building on FreeBSD 6 or earlier against system md5
author Igor Sysoev <igor@sysoev.ru>
date Fri, 27 May 2011 13:30:53 +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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5
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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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10
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11 #if (NGX_HAVE_ATOMIC_OPS)
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12
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13
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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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38
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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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131 continue;
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diff changeset
132 }
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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()
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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()
Igor Sysoev <igor@sysoev.ru>
parents: 1100
diff changeset
142 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
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()
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
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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