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0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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0
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10
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11
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12 static ngx_uint_t nthreads;
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13 static ngx_uint_t max_threads;
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14
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15
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16 static pthread_attr_t thr_attr;
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17
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18
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112
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19 ngx_err_t
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20 ngx_create_thread(ngx_tid_t *tid, ngx_thread_value_t (*func)(void *arg),
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21 void *arg, ngx_log_t *log)
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0
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22 {
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23 int err;
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24
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25 if (nthreads >= max_threads) {
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26 ngx_log_error(NGX_LOG_CRIT, log, 0,
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10
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27 "no more than %ui threads can be created", max_threads);
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0
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28 return NGX_ERROR;
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29 }
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30
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31 err = pthread_create(tid, &thr_attr, func, arg);
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32
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33 if (err != 0) {
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34 ngx_log_error(NGX_LOG_ALERT, log, err, "pthread_create() failed");
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35 return err;
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36 }
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37
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38 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0,
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10
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39 "thread is created: " NGX_TID_T_FMT, *tid);
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0
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40
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41 nthreads++;
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42
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43 return err;
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44 }
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45
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46
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112
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47 ngx_int_t
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48 ngx_init_threads(int n, size_t size, ngx_cycle_t *cycle)
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126
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49 {
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0
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50 int err;
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51
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52 max_threads = n;
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53
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54 err = pthread_attr_init(&thr_attr);
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55
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56 if (err != 0) {
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57 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
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58 "pthread_attr_init() failed");
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59 return NGX_ERROR;
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60 }
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61
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62 err = pthread_attr_setstacksize(&thr_attr, size);
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63
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64 if (err != 0) {
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65 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
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66 "pthread_attr_setstacksize() failed");
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67 return NGX_ERROR;
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68 }
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69
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70 ngx_threaded = 1;
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71
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72 return NGX_OK;
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73 }
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74
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75
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112
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76 ngx_mutex_t *
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77 ngx_mutex_init(ngx_log_t *log, ngx_uint_t flags)
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0
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78 {
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79 int err;
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80 ngx_mutex_t *m;
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81
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50
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82 m = ngx_alloc(sizeof(ngx_mutex_t), log);
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83 if (m == NULL) {
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0
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84 return NULL;
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85 }
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126
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86
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0
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87 m->log = log;
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88
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89 err = pthread_mutex_init(&m->mutex, NULL);
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90
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91 if (err != 0) {
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92 ngx_log_error(NGX_LOG_ALERT, m->log, err,
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93 "pthread_mutex_init() failed");
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94 return NULL;
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95 }
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96
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97 return m;
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98 }
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99
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100
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112
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101 void
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102 ngx_mutex_destroy(ngx_mutex_t *m)
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0
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103 {
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104 int err;
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105
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106 err = pthread_mutex_destroy(&m->mutex);
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107
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108 if (err != 0) {
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109 ngx_log_error(NGX_LOG_ALERT, m->log, err,
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10
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110 "pthread_mutex_destroy(%p) failed", m);
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0
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111 }
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112
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113 ngx_free(m);
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114 }
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115
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116
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112
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117 void
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118 ngx_mutex_lock(ngx_mutex_t *m)
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0
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119 {
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120 int err;
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121
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122 if (!ngx_threaded) {
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112
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123 return;
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0
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124 }
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125
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10
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126 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "lock mutex %p", m);
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0
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127
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128 err = pthread_mutex_lock(&m->mutex);
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129
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130 if (err != 0) {
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131 ngx_log_error(NGX_LOG_ALERT, m->log, err,
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10
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132 "pthread_mutex_lock(%p) failed", m);
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112
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133 ngx_abort();
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0
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134 }
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135
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10
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136 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
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0
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137
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112
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138 return;
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0
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139 }
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140
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141
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112
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142 ngx_int_t
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143 ngx_mutex_trylock(ngx_mutex_t *m)
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0
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144 {
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145 int err;
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146
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147 if (!ngx_threaded) {
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148 return NGX_OK;
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149 }
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150
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10
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151 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "try lock mutex %p", m);
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0
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152
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153 err = pthread_mutex_trylock(&m->mutex);
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154
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155 if (err == NGX_EBUSY) {
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156 return NGX_AGAIN;
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157 }
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158
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159 if (err != 0) {
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160 ngx_log_error(NGX_LOG_ALERT, m->log, err,
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10
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161 "pthread_mutex_trylock(%p) failed", m);
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112
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162 ngx_abort();
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0
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163 }
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164
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10
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165 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
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0
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166
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167 return NGX_OK;
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168 }
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169
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170
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112
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171 void
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172 ngx_mutex_unlock(ngx_mutex_t *m)
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0
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173 {
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174 int err;
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175
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176 if (!ngx_threaded) {
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112
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177 return;
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0
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178 }
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179
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10
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180 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "unlock mutex %p", m);
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0
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181
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182 err = pthread_mutex_unlock(&m->mutex);
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183
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184 if (err != 0) {
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185 ngx_log_error(NGX_LOG_ALERT, m->log, err,
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10
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186 "pthread_mutex_unlock(%p) failed", m);
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112
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187 ngx_abort();
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0
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188 }
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189
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10
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190 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is unlocked", m);
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0
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191
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112
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192 return;
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0
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193 }
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194
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195
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112
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196 ngx_cond_t *
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197 ngx_cond_init(ngx_log_t *log)
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0
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198 {
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199 int err;
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200 ngx_cond_t *cv;
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201
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50
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202 cv = ngx_alloc(sizeof(ngx_cond_t), log);
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203 if (cv == NULL) {
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0
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204 return NULL;
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205 }
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126
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206
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0
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207 cv->log = log;
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208
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209 err = pthread_cond_init(&cv->cond, NULL);
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210
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211 if (err != 0) {
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212 ngx_log_error(NGX_LOG_ALERT, cv->log, err,
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213 "pthread_cond_init() failed");
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214 return NULL;
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215 }
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216
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217 return cv;
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218 }
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219
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220
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112
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221 void
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222 ngx_cond_destroy(ngx_cond_t *cv)
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0
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223 {
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224 int err;
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225
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226 err = pthread_cond_destroy(&cv->cond);
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227
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228 if (err != 0) {
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229 ngx_log_error(NGX_LOG_ALERT, cv->log, err,
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10
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230 "pthread_cond_destroy(%p) failed", cv);
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0
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231 }
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232
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233 ngx_free(cv);
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234 }
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235
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236
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112
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237 ngx_int_t
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238 ngx_cond_wait(ngx_cond_t *cv, ngx_mutex_t *m)
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0
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239 {
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240 int err;
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241
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10
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242 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p wait", cv);
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0
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243
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244 err = pthread_cond_wait(&cv->cond, &m->mutex);
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245
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246 if (err != 0) {
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247 ngx_log_error(NGX_LOG_ALERT, cv->log, err,
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10
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248 "pthread_cond_wait(%p) failed", cv);
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0
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249 return NGX_ERROR;
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250 }
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251
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10
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252 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p is waked up", cv);
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0
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253
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10
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254 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
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0
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255
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256 return NGX_OK;
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257 }
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258
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259
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112
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260 ngx_int_t
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261 ngx_cond_signal(ngx_cond_t *cv)
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0
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262 {
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263 int err;
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264
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10
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265 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p to signal", cv);
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0
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266
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267 err = pthread_cond_signal(&cv->cond);
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268
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269 if (err != 0) {
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270 ngx_log_error(NGX_LOG_ALERT, cv->log, err,
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10
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271 "pthread_cond_signal(%p) failed", cv);
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0
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272 return NGX_ERROR;
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273 }
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274
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10
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275 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p is signaled", cv);
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0
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276
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277 return NGX_OK;
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278 }
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