0
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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 #include <ngx_event.h>
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10
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11
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12 #define DEFAULT_CONNECTIONS 512
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13
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14
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16
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15 extern ngx_module_t ngx_kqueue_module;
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16 extern ngx_module_t ngx_devpoll_module;
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17 extern ngx_module_t ngx_epoll_module;
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18 extern ngx_module_t ngx_rtsig_module;
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0
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19 extern ngx_module_t ngx_select_module;
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20
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21
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22 static ngx_int_t ngx_event_module_init(ngx_cycle_t *cycle);
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23 static ngx_int_t ngx_event_process_init(ngx_cycle_t *cycle);
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24 static char *ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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25
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26 static char *ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd,
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58
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27 void *conf);
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28 static char *ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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29 static char *ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd,
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58
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30 void *conf);
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0
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31
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32 static void *ngx_event_create_conf(ngx_cycle_t *cycle);
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33 static char *ngx_event_init_conf(ngx_cycle_t *cycle, void *conf);
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34 static char *ngx_accept_mutex_check(ngx_conf_t *cf, void *post, void *data);
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35
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36
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112
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37 static ngx_uint_t ngx_timer_resolution;
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38 sig_atomic_t ngx_event_timer_alarm;
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39
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44
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40 static ngx_uint_t ngx_event_max_module;
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0
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41
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44
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42 ngx_uint_t ngx_event_flags;
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43 ngx_event_actions_t ngx_event_actions;
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0
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44
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45
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110
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46 ngx_atomic_t connection_counter = 1;
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42
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47 ngx_atomic_t *ngx_connection_counter = &connection_counter;
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0
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48
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49
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42
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50 ngx_atomic_t *ngx_accept_mutex_ptr;
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122
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51 ngx_atomic_t *ngx_accept_mutex_last_owner;
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42
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52 ngx_atomic_t *ngx_accept_mutex;
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44
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53 ngx_uint_t ngx_accept_mutex_held;
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54 ngx_msec_t ngx_accept_mutex_delay;
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55 ngx_int_t ngx_accept_disabled;
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110
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56 ngx_file_t ngx_accept_mutex_lock_file;
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0
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57
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58
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59 #if (NGX_STAT_STUB)
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60
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61 ngx_atomic_t ngx_stat_accepted0;
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62 ngx_atomic_t *ngx_stat_accepted = &ngx_stat_accepted0;
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44
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63 ngx_atomic_t ngx_stat_handled0;
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64 ngx_atomic_t *ngx_stat_handled = &ngx_stat_handled0;
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65 ngx_atomic_t ngx_stat_requests0;
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66 ngx_atomic_t *ngx_stat_requests = &ngx_stat_requests0;
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67 ngx_atomic_t ngx_stat_active0;
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68 ngx_atomic_t *ngx_stat_active = &ngx_stat_active0;
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69 ngx_atomic_t ngx_stat_reading0;
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70 ngx_atomic_t *ngx_stat_reading = &ngx_stat_reading0;
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71 ngx_atomic_t ngx_stat_writing0;
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44
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72 ngx_atomic_t *ngx_stat_writing = &ngx_stat_writing0;
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0
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73
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74 #endif
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75
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76
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77
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78 static ngx_command_t ngx_events_commands[] = {
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79
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80 { ngx_string("events"),
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81 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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82 ngx_events_block,
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83 0,
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84 0,
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85 NULL },
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86
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87 ngx_null_command
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88 };
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89
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90
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91 static ngx_core_module_t ngx_events_module_ctx = {
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92 ngx_string("events"),
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93 NULL,
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94 NULL
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95 };
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96
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97
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98 ngx_module_t ngx_events_module = {
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58
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99 NGX_MODULE_V1,
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100 &ngx_events_module_ctx, /* module context */
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101 ngx_events_commands, /* module directives */
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102 NGX_CORE_MODULE, /* module type */
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90
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103 NULL, /* init master */
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104 NULL, /* init module */
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105 NULL, /* init process */
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106 NULL, /* init thread */
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107 NULL, /* exit thread */
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108 NULL, /* exit process */
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109 NULL, /* exit master */
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110 NGX_MODULE_V1_PADDING
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111 };
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112
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113
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114 static ngx_str_t event_core_name = ngx_string("event_core");
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115
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116 static ngx_conf_post_t ngx_accept_mutex_post = { ngx_accept_mutex_check } ;
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117
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118
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119 static ngx_command_t ngx_event_core_commands[] = {
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120
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92
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121 { ngx_string("worker_connections"),
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122 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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123 ngx_event_connections,
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124 0,
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125 0,
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126 NULL },
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127
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128 { ngx_string("connections"),
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129 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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130 ngx_event_connections,
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131 0,
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132 0,
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133 NULL },
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134
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135 { ngx_string("use"),
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136 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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137 ngx_event_use,
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138 0,
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139 0,
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140 NULL },
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141
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142 { ngx_string("multi_accept"),
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143 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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144 ngx_conf_set_flag_slot,
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145 0,
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146 offsetof(ngx_event_conf_t, multi_accept),
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147 NULL },
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148
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149 { ngx_string("accept_mutex"),
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150 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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151 ngx_conf_set_flag_slot,
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152 0,
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153 offsetof(ngx_event_conf_t, accept_mutex),
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154 &ngx_accept_mutex_post },
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155
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156 { ngx_string("accept_mutex_delay"),
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157 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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158 ngx_conf_set_msec_slot,
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159 0,
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160 offsetof(ngx_event_conf_t, accept_mutex_delay),
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161 NULL },
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162
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163 { ngx_string("debug_connection"),
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164 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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165 ngx_event_debug_connection,
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166 0,
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167 0,
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168 NULL },
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169
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170 ngx_null_command
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171 };
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172
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173
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174 ngx_event_module_t ngx_event_core_module_ctx = {
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175 &event_core_name,
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176 ngx_event_create_conf, /* create configuration */
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177 ngx_event_init_conf, /* init configuration */
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178
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179 { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
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180 };
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181
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182
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183 ngx_module_t ngx_event_core_module = {
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184 NGX_MODULE_V1,
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185 &ngx_event_core_module_ctx, /* module context */
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186 ngx_event_core_commands, /* module directives */
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187 NGX_EVENT_MODULE, /* module type */
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188 NULL, /* init master */
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189 ngx_event_module_init, /* init module */
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190 ngx_event_process_init, /* init process */
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191 NULL, /* init thread */
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192 NULL, /* exit thread */
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193 NULL, /* exit process */
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194 NULL, /* exit master */
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195 NGX_MODULE_V1_PADDING
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0
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196 };
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197
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198
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112
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199 void
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200 ngx_process_events_and_timers(ngx_cycle_t *cycle)
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201 {
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202 ngx_uint_t flags;
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116
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203 ngx_msec_t timer, delta;
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204
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205 if (ngx_timer_resolution) {
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206 timer = NGX_TIMER_INFINITE;
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207 flags = 0;
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208
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209 } else {
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210 timer = ngx_event_find_timer();
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211 flags = NGX_UPDATE_TIME;
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212
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213 #if (NGX_THREADS)
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214
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215 if (timer == NGX_TIMER_INFINITE || timer > 500) {
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216 timer = 500;
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217 }
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218
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219 #endif
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220 }
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221
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222 if (ngx_accept_mutex) {
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223 if (ngx_accept_disabled > 0) {
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224 ngx_accept_disabled--;
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225
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226 } else {
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227 if (ngx_trylock_accept_mutex(cycle) == NGX_ERROR) {
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228 return;
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229 }
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230
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231 if (ngx_accept_mutex_held) {
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232 flags |= NGX_POST_EVENTS;
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233
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234 } else {
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235 if (timer == NGX_TIMER_INFINITE
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236 || timer > ngx_accept_mutex_delay)
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237 {
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238 timer = ngx_accept_mutex_delay;
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239 }
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240 }
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241 }
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242 }
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243
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116
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244 delta = ngx_current_msec;
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245
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112
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246 (void) ngx_process_events(cycle, timer, flags);
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247
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116
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248 delta = ngx_current_msec - delta;
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249
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250 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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251 "timer delta: %M", delta);
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252
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112
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253 if (ngx_posted_accept_events) {
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254 ngx_event_process_posted(cycle, &ngx_posted_accept_events);
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255 }
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256
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257 if (ngx_accept_mutex_held) {
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116
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258 *ngx_accept_mutex = 0;
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112
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259 }
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260
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122
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261 if (delta) {
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262 ngx_event_expire_timers();
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263 }
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264
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112
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265 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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266 "posted events %p", ngx_posted_events);
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267
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268 if (ngx_posted_events) {
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269 if (ngx_threaded) {
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270 ngx_wakeup_worker_thread(cycle);
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271
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272 } else {
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273 ngx_event_process_posted(cycle, &ngx_posted_events);
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274 }
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275 }
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276 }
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277
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278
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279 ngx_int_t
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280 ngx_handle_read_event(ngx_event_t *rev, u_int flags)
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281 {
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282 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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283
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284 /* kqueue, epoll */
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285
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286 if (!rev->active && !rev->ready) {
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287 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT)
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288 == NGX_ERROR)
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289 {
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290 return NGX_ERROR;
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291 }
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292 }
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293
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294 return NGX_OK;
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295
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296 } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
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297
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298 /* select, poll, /dev/poll */
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299
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300 if (!rev->active && !rev->ready) {
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301 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT)
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302 == NGX_ERROR)
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303 {
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304 return NGX_ERROR;
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305 }
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306
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307 return NGX_OK;
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308 }
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309
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310 if (rev->active && (rev->ready || (flags & NGX_CLOSE_EVENT))) {
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311 if (ngx_del_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT | flags)
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312 == NGX_ERROR)
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313 {
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314 return NGX_ERROR;
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315 }
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316
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317 return NGX_OK;
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318 }
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319
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320 } else if (ngx_event_flags & NGX_USE_ONESHOT_EVENT) {
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321
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322 /* event ports */
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323
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324 if (!rev->active) {
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325 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_ONESHOT_EVENT)
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326 == NGX_ERROR)
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327 {
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328 return NGX_ERROR;
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329 }
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330 }
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331
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332 return NGX_OK;
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333 }
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334
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335 /* aio, iocp, rtsig */
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336
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337 return NGX_OK;
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338 }
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339
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340
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341 ngx_int_t
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342 ngx_handle_write_event(ngx_event_t *wev, size_t lowat)
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343 {
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344 ngx_connection_t *c;
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345
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346 if (lowat) {
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347 c = (ngx_connection_t *) wev->data;
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348
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349 if (ngx_send_lowat(c, lowat) == NGX_ERROR) {
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350 return NGX_ERROR;
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351 }
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352 }
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353
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354 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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355
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356 /* kqueue, epoll */
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357
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358 if (!wev->active && !wev->ready) {
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359 if (ngx_add_event(wev, NGX_WRITE_EVENT,
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360 NGX_CLEAR_EVENT | (lowat ? NGX_LOWAT_EVENT : 0))
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361 == NGX_ERROR)
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362 {
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363 return NGX_ERROR;
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364 }
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365 }
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366
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367 return NGX_OK;
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368
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369 } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
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370
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371 /* select, poll, /dev/poll */
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372
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373 if (!wev->active && !wev->ready) {
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374 if (ngx_add_event(wev, NGX_WRITE_EVENT, NGX_LEVEL_EVENT)
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375 == NGX_ERROR)
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376 {
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377 return NGX_ERROR;
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378 }
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379
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380 return NGX_OK;
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381 }
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382
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383 if (wev->active && wev->ready) {
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384 if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_LEVEL_EVENT)
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385 == NGX_ERROR)
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386 {
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387 return NGX_ERROR;
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388 }
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389
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390 return NGX_OK;
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391 }
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392
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393 } else if (ngx_event_flags & NGX_USE_ONESHOT_EVENT) {
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394
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395 /* event ports */
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396
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397 if (!wev->active) {
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398 if (ngx_add_event(wev, NGX_WRITE_EVENT, NGX_ONESHOT_EVENT)
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399 == NGX_ERROR)
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400 {
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401 return NGX_ERROR;
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402 }
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403 }
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404
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405 return NGX_OK;
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406 }
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407
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408 /* aio, iocp, rtsig */
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409
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410 return NGX_OK;
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411 }
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412
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413
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414 static ngx_int_t
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415 ngx_event_module_init(ngx_cycle_t *cycle)
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0
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416 {
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92
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417 void ***cf;
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418 ngx_event_conf_t *ecf;
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112
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419 ngx_core_conf_t *ccf;
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10
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420 #if !(NGX_WIN32)
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92
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421 char *shared;
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22
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422 size_t size;
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92
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423 ngx_int_t limit;
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424 struct rlimit rlmt;
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425 #endif
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22
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426
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427 cf = ngx_get_conf(cycle->conf_ctx, ngx_events_module);
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428
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429 if (cf == NULL) {
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430 ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
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431 "no \"events\" section in configuration");
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432 return NGX_ERROR;
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433 }
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434
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435 ecf = (*cf)[ngx_event_core_module.ctx_index];
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436
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110
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437 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
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22
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438 "using the \"%s\" event method", ecf->name);
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439
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112
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440 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
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0
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441
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112
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442 ngx_timer_resolution = ccf->timer_resolution;
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443
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444 #if !(NGX_WIN32)
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0
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445
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92
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446 if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
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447 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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448 "getrlimit(RLIMIT_NOFILE) failed, ignored");
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449
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450 } else {
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451 if (ecf->connections > (ngx_uint_t) rlmt.rlim_cur
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452 && (ccf->rlimit_nofile == NGX_CONF_UNSET
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453 || ecf->connections > (ngx_uint_t) ccf->rlimit_nofile))
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454 {
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455 limit = (ccf->rlimit_nofile == NGX_CONF_UNSET) ?
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456 (ngx_int_t) rlmt.rlim_cur : ccf->rlimit_nofile;
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457
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458 ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
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459 "%ui worker_connections are more than "
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460 "open file resource limit: %i",
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461 ecf->connections, limit);
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462 }
|
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463 }
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464
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465
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0
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466 if (ccf->master == 0 || ngx_accept_mutex_ptr) {
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467 return NGX_OK;
|
|
468 }
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469
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470
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32
|
471 /* TODO: adjust cache line size, 128 is P4 cache line size */
|
0
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472
|
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473 size = 128 /* ngx_accept_mutex */
|
122
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474 + 128 /* ngx_accept_mutex_last_owner */
|
0
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475 + 128; /* ngx_connection_counter */
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476
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477 #if (NGX_STAT_STUB)
|
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478
|
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479 size += 128 /* ngx_stat_accepted */
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44
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480 + 128 /* ngx_stat_handled */
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0
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481 + 128 /* ngx_stat_requests */
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482 + 128 /* ngx_stat_active */
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483 + 128 /* ngx_stat_reading */
|
|
484 + 128; /* ngx_stat_writing */
|
|
485
|
|
486 #endif
|
|
487
|
50
|
488 shared = ngx_create_shared_memory(size, cycle->log);
|
|
489 if (shared == NULL) {
|
0
|
490 return NGX_ERROR;
|
|
491 }
|
|
492
|
|
493 ngx_accept_mutex_ptr = (ngx_atomic_t *) shared;
|
122
|
494 ngx_accept_mutex_last_owner = (ngx_atomic_t *) (shared + 1 * 128);
|
|
495 ngx_connection_counter = (ngx_atomic_t *) (shared + 2 * 128);
|
0
|
496
|
|
497 #if (NGX_STAT_STUB)
|
|
498
|
122
|
499 ngx_stat_accepted = (ngx_atomic_t *) (shared + 3 * 128);
|
|
500 ngx_stat_handled = (ngx_atomic_t *) (shared + 4 * 128);
|
|
501 ngx_stat_requests = (ngx_atomic_t *) (shared + 5 * 128);
|
|
502 ngx_stat_active = (ngx_atomic_t *) (shared + 6 * 128);
|
|
503 ngx_stat_reading = (ngx_atomic_t *) (shared + 7 * 128);
|
|
504 ngx_stat_writing = (ngx_atomic_t *) (shared + 8 * 128);
|
0
|
505
|
|
506 #endif
|
|
507
|
112
|
508 *ngx_connection_counter = 1;
|
|
509
|
0
|
510 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
511 "counter: %p, %d",
|
0
|
512 ngx_connection_counter, *ngx_connection_counter);
|
|
513
|
92
|
514 #endif /* !(NGX_WIN32) */
|
0
|
515
|
|
516 return NGX_OK;
|
|
517 }
|
|
518
|
|
519
|
112
|
520 #if !(NGX_WIN32)
|
|
521
|
|
522 void
|
|
523 ngx_timer_signal_handler(int signo)
|
|
524 {
|
|
525 ngx_event_timer_alarm = 1;
|
|
526
|
|
527 ngx_time_update(0, 0);
|
|
528
|
|
529 #if 1
|
|
530 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "timer signal");
|
|
531 #endif
|
|
532 }
|
|
533
|
|
534 #endif
|
|
535
|
|
536
|
58
|
537 static ngx_int_t
|
|
538 ngx_event_process_init(ngx_cycle_t *cycle)
|
0
|
539 {
|
|
540 ngx_uint_t m, i;
|
|
541 ngx_event_t *rev, *wev;
|
92
|
542 ngx_listening_t *ls;
|
|
543 ngx_connection_t *c, *next, *old;
|
0
|
544 ngx_core_conf_t *ccf;
|
|
545 ngx_event_conf_t *ecf;
|
|
546 ngx_event_module_t *module;
|
10
|
547 #if (NGX_WIN32)
|
0
|
548 ngx_iocp_conf_t *iocpcf;
|
92
|
549 #else
|
|
550 struct rlimit rlmt;
|
112
|
551 struct sigaction sa;
|
|
552 struct itimerval itv;
|
0
|
553 #endif
|
|
554
|
|
555 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
556 ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module);
|
|
557
|
|
558 if (ngx_accept_mutex_ptr && ccf->worker_processes > 1 && ecf->accept_mutex)
|
|
559 {
|
|
560 ngx_accept_mutex = ngx_accept_mutex_ptr;
|
|
561 ngx_accept_mutex_held = 0;
|
|
562 ngx_accept_mutex_delay = ecf->accept_mutex_delay;
|
|
563 }
|
|
564
|
|
565 #if (NGX_THREADS)
|
50
|
566 ngx_posted_events_mutex = ngx_mutex_init(cycle->log, 0);
|
|
567 if (ngx_posted_events_mutex == NULL) {
|
0
|
568 return NGX_ERROR;
|
|
569 }
|
|
570 #endif
|
|
571
|
|
572 if (ngx_event_timer_init(cycle->log) == NGX_ERROR) {
|
|
573 return NGX_ERROR;
|
|
574 }
|
|
575
|
|
576 cycle->connection_n = ecf->connections;
|
|
577
|
|
578 for (m = 0; ngx_modules[m]; m++) {
|
|
579 if (ngx_modules[m]->type != NGX_EVENT_MODULE) {
|
|
580 continue;
|
|
581 }
|
|
582
|
|
583 if (ngx_modules[m]->ctx_index == ecf->use) {
|
|
584 module = ngx_modules[m]->ctx;
|
112
|
585 if (module->actions.init(cycle, ngx_timer_resolution) == NGX_ERROR)
|
|
586 {
|
0
|
587 /* fatal */
|
|
588 exit(2);
|
|
589 }
|
|
590 break;
|
|
591 }
|
|
592 }
|
|
593
|
92
|
594 #if !(NGX_WIN32)
|
|
595
|
112
|
596 if (ngx_timer_resolution && !(ngx_event_flags & NGX_USE_TIMER_EVENT)) {
|
|
597
|
|
598 ngx_memzero(&sa, sizeof(struct sigaction));
|
|
599 sa.sa_handler = ngx_timer_signal_handler;
|
|
600 sigemptyset(&sa.sa_mask);
|
|
601
|
|
602 if (sigaction(SIGALRM, &sa, NULL) == -1) {
|
|
603 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
604 "sigaction(SIGALRM) failed");
|
|
605 return NGX_ERROR;
|
|
606 }
|
|
607
|
|
608 itv.it_interval.tv_sec = ngx_timer_resolution / 1000;
|
|
609 itv.it_interval.tv_usec = (ngx_timer_resolution % 1000) * 1000;
|
|
610 itv.it_value.tv_sec = ngx_timer_resolution / 1000;
|
|
611 itv.it_value.tv_usec = (ngx_timer_resolution % 1000 ) * 1000;
|
|
612
|
|
613 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
|
|
614 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
615 "setitimer() failed");
|
|
616 }
|
|
617 }
|
|
618
|
92
|
619 if (ngx_event_flags & NGX_USE_FD_EVENT) {
|
|
620
|
|
621 if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
|
|
622 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
623 "getrlimit(RLIMIT_NOFILE) failed");
|
|
624 return NGX_ERROR;
|
|
625 }
|
|
626
|
|
627 cycle->files_n = (ngx_uint_t) rlmt.rlim_cur;
|
|
628
|
|
629 cycle->files = ngx_calloc(sizeof(ngx_connection_t *) * cycle->files_n,
|
|
630 cycle->log);
|
|
631 if (cycle->files == NULL) {
|
|
632 return NGX_ERROR;
|
|
633 }
|
|
634 }
|
|
635
|
|
636 #endif
|
|
637
|
110
|
638 cycle->connections = ngx_alloc(sizeof(ngx_connection_t) * ecf->connections,
|
0
|
639 cycle->log);
|
110
|
640 if (cycle->connections == NULL) {
|
0
|
641 return NGX_ERROR;
|
|
642 }
|
|
643
|
110
|
644 c = cycle->connections;
|
0
|
645
|
110
|
646 cycle->read_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections,
|
0
|
647 cycle->log);
|
110
|
648 if (cycle->read_events == NULL) {
|
0
|
649 return NGX_ERROR;
|
|
650 }
|
|
651
|
110
|
652 rev = cycle->read_events;
|
0
|
653 for (i = 0; i < cycle->connection_n; i++) {
|
|
654 rev[i].closed = 1;
|
30
|
655 rev[i].instance = 1;
|
0
|
656 #if (NGX_THREADS)
|
|
657 rev[i].lock = &c[i].lock;
|
|
658 rev[i].own_lock = &c[i].lock;
|
|
659 #endif
|
|
660 }
|
|
661
|
110
|
662 cycle->write_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections,
|
30
|
663 cycle->log);
|
110
|
664 if (cycle->write_events == NULL) {
|
0
|
665 return NGX_ERROR;
|
|
666 }
|
|
667
|
110
|
668 wev = cycle->write_events;
|
0
|
669 for (i = 0; i < cycle->connection_n; i++) {
|
|
670 wev[i].closed = 1;
|
|
671 #if (NGX_THREADS)
|
|
672 wev[i].lock = &c[i].lock;
|
|
673 wev[i].own_lock = &c[i].lock;
|
|
674 #endif
|
|
675 }
|
|
676
|
92
|
677 i = cycle->connection_n;
|
|
678 next = NULL;
|
|
679
|
|
680 do {
|
|
681 i--;
|
|
682
|
|
683 c[i].data = next;
|
110
|
684 c[i].read = &cycle->read_events[i];
|
|
685 c[i].write = &cycle->write_events[i];
|
92
|
686 c[i].fd = (ngx_socket_t) -1;
|
|
687
|
|
688 next = &c[i];
|
|
689
|
|
690 #if (NGX_THREADS)
|
|
691 c[i].lock = 0;
|
|
692 #endif
|
|
693 } while (i);
|
|
694
|
|
695 cycle->free_connections = next;
|
|
696 cycle->free_connection_n = ecf->connections;
|
|
697
|
0
|
698 /* for each listening socket */
|
|
699
|
92
|
700 ls = cycle->listening.elts;
|
0
|
701 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
702
|
92
|
703 c = ngx_get_connection(ls[i].fd, cycle->log);
|
0
|
704
|
92
|
705 if (c == NULL) {
|
|
706 return NGX_ERROR;
|
|
707 }
|
0
|
708
|
92
|
709 c->log = &ls[i].log;
|
|
710
|
|
711 c->listening = &ls[i];
|
|
712 ls[i].connection = c;
|
|
713
|
|
714 c->ctx = ls[i].ctx;
|
|
715 c->servers = ls[i].servers;
|
|
716
|
110
|
717 rev = c->read;
|
0
|
718
|
|
719 rev->log = c->log;
|
|
720 rev->accept = 1;
|
|
721
|
18
|
722 #if (NGX_HAVE_DEFERRED_ACCEPT)
|
92
|
723 rev->deferred_accept = ls[i].deferred_accept;
|
0
|
724 #endif
|
|
725
|
|
726 if (!(ngx_event_flags & NGX_USE_IOCP_EVENT)) {
|
92
|
727 if (ls[i].previous) {
|
0
|
728
|
|
729 /*
|
|
730 * delete the old accept events that were bound to
|
|
731 * the old cycle read events array
|
|
732 */
|
|
733
|
92
|
734 old = ls[i].previous->connection;
|
|
735
|
|
736 if (ngx_del_event(old->read, NGX_READ_EVENT, NGX_CLOSE_EVENT)
|
|
737 == NGX_ERROR)
|
0
|
738 {
|
|
739 return NGX_ERROR;
|
|
740 }
|
|
741
|
92
|
742 old->fd = (ngx_socket_t) -1;
|
0
|
743 }
|
|
744 }
|
|
745
|
10
|
746 #if (NGX_WIN32)
|
0
|
747
|
|
748 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
|
58
|
749 rev->handler = ngx_event_acceptex;
|
0
|
750
|
|
751 if (ngx_add_event(rev, 0, NGX_IOCP_ACCEPT) == NGX_ERROR) {
|
|
752 return NGX_ERROR;
|
|
753 }
|
|
754
|
92
|
755 ls[i].log.handler = ngx_acceptex_log_error;
|
|
756
|
0
|
757 iocpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_iocp_module);
|
92
|
758 if (ngx_event_post_acceptex(&ls[i], iocpcf->post_acceptex)
|
|
759 == NGX_ERROR)
|
0
|
760 {
|
|
761 return NGX_ERROR;
|
|
762 }
|
|
763
|
|
764 } else {
|
58
|
765 rev->handler = ngx_event_accept;
|
10
|
766
|
0
|
767 if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
|
|
768 return NGX_ERROR;
|
|
769 }
|
|
770 }
|
|
771
|
|
772 #else
|
|
773
|
58
|
774 rev->handler = ngx_event_accept;
|
0
|
775
|
|
776 if (ngx_accept_mutex) {
|
|
777 continue;
|
|
778 }
|
|
779
|
|
780 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
|
|
781 if (ngx_add_conn(c) == NGX_ERROR) {
|
|
782 return NGX_ERROR;
|
|
783 }
|
|
784
|
|
785 } else {
|
|
786 if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
|
|
787 return NGX_ERROR;
|
|
788 }
|
|
789 }
|
|
790
|
|
791 #endif
|
92
|
792
|
0
|
793 }
|
|
794
|
|
795 return NGX_OK;
|
|
796 }
|
|
797
|
|
798
|
58
|
799 ngx_int_t
|
|
800 ngx_send_lowat(ngx_connection_t *c, size_t lowat)
|
2
|
801 {
|
|
802 int sndlowat;
|
|
803
|
4
|
804 #if (NGX_HAVE_LOWAT_EVENT)
|
2
|
805
|
4
|
806 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
2
|
807 c->write->available = lowat;
|
|
808 return NGX_OK;
|
|
809 }
|
|
810
|
|
811 #endif
|
|
812
|
|
813 if (lowat == 0 || c->sndlowat) {
|
|
814 return NGX_OK;
|
|
815 }
|
|
816
|
|
817 sndlowat = (int) lowat;
|
|
818
|
|
819 if (setsockopt(c->fd, SOL_SOCKET, SO_SNDLOWAT,
|
|
820 (const void *) &sndlowat, sizeof(int)) == -1)
|
|
821 {
|
|
822 ngx_connection_error(c, ngx_socket_errno,
|
|
823 "setsockopt(SO_SNDLOWAT) failed");
|
|
824 return NGX_ERROR;
|
|
825 }
|
|
826
|
|
827 c->sndlowat = 1;
|
|
828
|
|
829 return NGX_OK;
|
|
830 }
|
|
831
|
|
832
|
58
|
833 static char *
|
|
834 ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
0
|
835 {
|
50
|
836 char *rv;
|
0
|
837 void ***ctx;
|
50
|
838 ngx_uint_t i;
|
0
|
839 ngx_conf_t pcf;
|
50
|
840 ngx_event_module_t *m;
|
0
|
841
|
|
842 /* count the number of the event modules and set up their indices */
|
|
843
|
|
844 ngx_event_max_module = 0;
|
50
|
845 for (i = 0; ngx_modules[i]; i++) {
|
|
846 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
|
0
|
847 continue;
|
|
848 }
|
|
849
|
50
|
850 ngx_modules[i]->ctx_index = ngx_event_max_module++;
|
0
|
851 }
|
|
852
|
50
|
853 ctx = ngx_pcalloc(cf->pool, sizeof(void *));
|
|
854 if (ctx == NULL) {
|
|
855 return NGX_CONF_ERROR;
|
|
856 }
|
0
|
857
|
50
|
858 *ctx = ngx_pcalloc(cf->pool, ngx_event_max_module * sizeof(void *));
|
|
859 if (*ctx == NULL) {
|
|
860 return NGX_CONF_ERROR;
|
|
861 }
|
0
|
862
|
|
863 *(void **) conf = ctx;
|
|
864
|
50
|
865 for (i = 0; ngx_modules[i]; i++) {
|
|
866 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
|
0
|
867 continue;
|
|
868 }
|
|
869
|
50
|
870 m = ngx_modules[i]->ctx;
|
0
|
871
|
50
|
872 if (m->create_conf) {
|
|
873 (*ctx)[ngx_modules[i]->ctx_index] = m->create_conf(cf->cycle);
|
|
874 if ((*ctx)[ngx_modules[i]->ctx_index] == NULL) {
|
|
875 return NGX_CONF_ERROR;
|
|
876 }
|
0
|
877 }
|
|
878 }
|
|
879
|
|
880 pcf = *cf;
|
|
881 cf->ctx = ctx;
|
|
882 cf->module_type = NGX_EVENT_MODULE;
|
|
883 cf->cmd_type = NGX_EVENT_CONF;
|
50
|
884
|
0
|
885 rv = ngx_conf_parse(cf, NULL);
|
50
|
886
|
0
|
887 *cf = pcf;
|
|
888
|
|
889 if (rv != NGX_CONF_OK)
|
|
890 return rv;
|
|
891
|
50
|
892 for (i = 0; ngx_modules[i]; i++) {
|
|
893 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
|
0
|
894 continue;
|
|
895 }
|
|
896
|
50
|
897 m = ngx_modules[i]->ctx;
|
0
|
898
|
50
|
899 if (m->init_conf) {
|
|
900 rv = m->init_conf(cf->cycle, (*ctx)[ngx_modules[i]->ctx_index]);
|
0
|
901 if (rv != NGX_CONF_OK) {
|
|
902 return rv;
|
|
903 }
|
|
904 }
|
|
905 }
|
|
906
|
|
907 return NGX_CONF_OK;
|
|
908 }
|
|
909
|
|
910
|
58
|
911 static char *
|
|
912 ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
0
|
913 {
|
|
914 ngx_event_conf_t *ecf = conf;
|
|
915
|
|
916 ngx_str_t *value;
|
|
917
|
|
918 if (ecf->connections != NGX_CONF_UNSET_UINT) {
|
|
919 return "is duplicate" ;
|
|
920 }
|
|
921
|
|
922 value = cf->args->elts;
|
|
923 ecf->connections = ngx_atoi(value[1].data, value[1].len);
|
|
924 if (ecf->connections == (ngx_uint_t) NGX_ERROR) {
|
|
925 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
10
|
926 "invalid number \"%V\"", &value[1]);
|
0
|
927
|
|
928 return NGX_CONF_ERROR;
|
|
929 }
|
|
930
|
|
931 cf->cycle->connection_n = ecf->connections;
|
|
932
|
|
933 return NGX_CONF_OK;
|
|
934 }
|
|
935
|
|
936
|
58
|
937 static char *
|
|
938 ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
0
|
939 {
|
|
940 ngx_event_conf_t *ecf = conf;
|
|
941
|
|
942 ngx_int_t m;
|
|
943 ngx_str_t *value;
|
|
944 ngx_event_conf_t *old_ecf;
|
|
945 ngx_event_module_t *module;
|
|
946
|
|
947 if (ecf->use != NGX_CONF_UNSET_UINT) {
|
|
948 return "is duplicate" ;
|
|
949 }
|
|
950
|
|
951 value = cf->args->elts;
|
|
952
|
|
953 if (cf->cycle->old_cycle->conf_ctx) {
|
|
954 old_ecf = ngx_event_get_conf(cf->cycle->old_cycle->conf_ctx,
|
|
955 ngx_event_core_module);
|
|
956 } else {
|
|
957 old_ecf = NULL;
|
|
958 }
|
|
959
|
|
960
|
|
961 for (m = 0; ngx_modules[m]; m++) {
|
|
962 if (ngx_modules[m]->type != NGX_EVENT_MODULE) {
|
|
963 continue;
|
|
964 }
|
|
965
|
|
966 module = ngx_modules[m]->ctx;
|
|
967 if (module->name->len == value[1].len) {
|
|
968 if (ngx_strcmp(module->name->data, value[1].data) == 0) {
|
|
969 ecf->use = ngx_modules[m]->ctx_index;
|
|
970 ecf->name = module->name->data;
|
|
971
|
|
972 if (ngx_process == NGX_PROCESS_SINGLE
|
|
973 && old_ecf
|
|
974 && old_ecf->use != ecf->use)
|
|
975 {
|
|
976 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
16
|
977 "when the server runs without a master process "
|
|
978 "the \"%V\" event type must be the same as "
|
|
979 "in previous configuration - \"%s\" "
|
|
980 "and it can not be changed on the fly, "
|
|
981 "to change it you need to stop server "
|
|
982 "and start it again",
|
|
983 &value[1], old_ecf->name);
|
0
|
984
|
|
985 return NGX_CONF_ERROR;
|
|
986 }
|
|
987
|
|
988 return NGX_CONF_OK;
|
|
989 }
|
|
990 }
|
|
991 }
|
|
992
|
|
993 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
10
|
994 "invalid event type \"%V\"", &value[1]);
|
0
|
995
|
|
996 return NGX_CONF_ERROR;
|
|
997 }
|
|
998
|
|
999
|
58
|
1000 static char *
|
|
1001 ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
0
|
1002 {
|
|
1003 #if (NGX_DEBUG)
|
|
1004 ngx_event_conf_t *ecf = conf;
|
|
1005
|
|
1006 in_addr_t *addr;
|
|
1007 ngx_str_t *value;
|
|
1008 struct hostent *h;
|
|
1009
|
|
1010 value = cf->args->elts;
|
|
1011
|
|
1012 /* AF_INET only */
|
|
1013
|
50
|
1014 addr = ngx_array_push(&ecf->debug_connection);
|
|
1015 if (addr == NULL) {
|
0
|
1016 return NGX_CONF_ERROR;
|
|
1017 }
|
|
1018
|
|
1019 *addr = inet_addr((char *) value[1].data);
|
|
1020
|
|
1021 if (*addr != INADDR_NONE) {
|
|
1022 return NGX_OK;
|
|
1023 }
|
|
1024
|
|
1025 h = gethostbyname((char *) value[1].data);
|
|
1026
|
|
1027 if (h == NULL || h->h_addr_list[0] == NULL) {
|
|
1028 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
10
|
1029 "host \"%s\" not found", value[1].data);
|
0
|
1030 return NGX_CONF_ERROR;
|
|
1031 }
|
|
1032
|
|
1033 *addr = *(in_addr_t *)(h->h_addr_list[0]);
|
|
1034
|
|
1035 #else
|
|
1036
|
|
1037 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
|
1038 "\"debug_connection\" is ignored, you need to rebuild "
|
|
1039 "nginx using --with-debug option to enable it");
|
|
1040
|
|
1041 #endif
|
|
1042
|
|
1043 return NGX_OK;
|
|
1044 }
|
|
1045
|
|
1046
|
58
|
1047 static void *
|
|
1048 ngx_event_create_conf(ngx_cycle_t *cycle)
|
0
|
1049 {
|
|
1050 ngx_event_conf_t *ecf;
|
|
1051
|
50
|
1052 ecf = ngx_palloc(cycle->pool, sizeof(ngx_event_conf_t));
|
|
1053 if (ecf == NULL) {
|
|
1054 return NGX_CONF_ERROR;
|
|
1055 }
|
0
|
1056
|
|
1057 ecf->connections = NGX_CONF_UNSET_UINT;
|
|
1058 ecf->use = NGX_CONF_UNSET_UINT;
|
|
1059 ecf->multi_accept = NGX_CONF_UNSET;
|
|
1060 ecf->accept_mutex = NGX_CONF_UNSET;
|
|
1061 ecf->accept_mutex_delay = NGX_CONF_UNSET_MSEC;
|
|
1062 ecf->name = (void *) NGX_CONF_UNSET;
|
|
1063
|
|
1064 #if (NGX_DEBUG)
|
50
|
1065
|
|
1066 if (ngx_array_init(&ecf->debug_connection, cycle->pool, 4,
|
|
1067 sizeof(in_addr_t)) == NGX_ERROR)
|
|
1068 {
|
|
1069 return NGX_CONF_ERROR;
|
|
1070 }
|
|
1071
|
0
|
1072 #endif
|
|
1073
|
|
1074 return ecf;
|
|
1075 }
|
|
1076
|
|
1077
|
58
|
1078 static char *
|
|
1079 ngx_event_init_conf(ngx_cycle_t *cycle, void *conf)
|
0
|
1080 {
|
|
1081 ngx_event_conf_t *ecf = conf;
|
16
|
1082
|
50
|
1083 #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
|
|
1084 int fd;
|
|
1085 #endif
|
|
1086 #if (NGX_HAVE_RTSIG)
|
|
1087 ngx_uint_t rtsig;
|
122
|
1088 ngx_core_conf_t *ccf;
|
50
|
1089 #endif
|
16
|
1090 ngx_int_t i, connections;
|
|
1091 ngx_module_t *module;
|
|
1092 ngx_event_module_t *event_module;
|
|
1093
|
|
1094 connections = NGX_CONF_UNSET_UINT;
|
|
1095 module = NULL;
|
|
1096
|
18
|
1097 #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
|
16
|
1098
|
|
1099 fd = epoll_create(100);
|
|
1100
|
|
1101 if (fd != -1) {
|
|
1102 close(fd);
|
|
1103 connections = DEFAULT_CONNECTIONS;
|
|
1104 module = &ngx_epoll_module;
|
|
1105
|
|
1106 } else if (ngx_errno != NGX_ENOSYS) {
|
|
1107 connections = DEFAULT_CONNECTIONS;
|
|
1108 module = &ngx_epoll_module;
|
|
1109 }
|
|
1110
|
|
1111 #endif
|
|
1112
|
18
|
1113 #if (NGX_HAVE_RTSIG)
|
16
|
1114
|
|
1115 if (module == NULL) {
|
|
1116 connections = DEFAULT_CONNECTIONS;
|
|
1117 module = &ngx_rtsig_module;
|
|
1118 rtsig = 1;
|
50
|
1119
|
|
1120 } else {
|
|
1121 rtsig = 0;
|
16
|
1122 }
|
|
1123
|
|
1124 #endif
|
|
1125
|
18
|
1126 #if (NGX_HAVE_DEVPOLL)
|
16
|
1127
|
|
1128 connections = DEFAULT_CONNECTIONS;
|
|
1129 module = &ngx_devpoll_module;
|
|
1130
|
0
|
1131 #endif
|
|
1132
|
18
|
1133 #if (NGX_HAVE_KQUEUE)
|
0
|
1134
|
16
|
1135 connections = DEFAULT_CONNECTIONS;
|
|
1136 module = &ngx_kqueue_module;
|
0
|
1137
|
16
|
1138 #endif
|
0
|
1139
|
18
|
1140 #if (NGX_HAVE_SELECT)
|
0
|
1141
|
16
|
1142 if (module == NULL) {
|
0
|
1143
|
50
|
1144 #if (NGX_WIN32 || FD_SETSIZE >= DEFAULT_CONNECTIONS)
|
16
|
1145 connections = DEFAULT_CONNECTIONS;
|
0
|
1146 #else
|
50
|
1147 connections = FD_SETSIZE;
|
16
|
1148 #endif
|
|
1149 module = &ngx_select_module;
|
|
1150 }
|
|
1151
|
0
|
1152 #endif
|
|
1153
|
16
|
1154 if (module == NULL) {
|
|
1155 for (i = 0; ngx_modules[i]; i++) {
|
|
1156 if (ngx_modules[i]->type == NGX_EVENT_MODULE) {
|
|
1157 event_module = ngx_modules[i]->ctx;
|
0
|
1158
|
16
|
1159 if (ngx_strcmp(event_module->name->data, event_core_name.data)
|
|
1160 == 0)
|
|
1161 {
|
|
1162 continue;
|
|
1163 }
|
0
|
1164
|
16
|
1165 module = ngx_modules[i];
|
|
1166 break;
|
0
|
1167 }
|
|
1168 }
|
|
1169 }
|
|
1170
|
16
|
1171 if (module == NULL) {
|
0
|
1172 ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "no events module found");
|
|
1173 return NGX_CONF_ERROR;
|
|
1174 }
|
|
1175
|
16
|
1176 ngx_conf_init_unsigned_value(ecf->connections, connections);
|
|
1177 cycle->connection_n = ecf->connections;
|
0
|
1178
|
16
|
1179 ngx_conf_init_unsigned_value(ecf->use, module->ctx_index);
|
0
|
1180
|
16
|
1181 event_module = module->ctx;
|
|
1182 ngx_conf_init_ptr_value(ecf->name, event_module->name->data);
|
0
|
1183
|
|
1184 ngx_conf_init_value(ecf->multi_accept, 0);
|
|
1185 ngx_conf_init_value(ecf->accept_mutex, 1);
|
|
1186 ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500);
|
|
1187
|
16
|
1188
|
50
|
1189 #if (NGX_HAVE_RTSIG)
|
|
1190
|
|
1191 if (!rtsig) {
|
|
1192 return NGX_CONF_OK;
|
|
1193 }
|
|
1194
|
|
1195 if (ecf->accept_mutex) {
|
16
|
1196 return NGX_CONF_OK;
|
0
|
1197 }
|
16
|
1198
|
|
1199 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
0
|
1200
|
16
|
1201 if (ccf->worker_processes == 0) {
|
|
1202 return NGX_CONF_OK;
|
|
1203 }
|
|
1204
|
|
1205 ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
|
|
1206 "the \"rtsig\" method requires \"accept_mutex\" to be on");
|
|
1207
|
|
1208 return NGX_CONF_ERROR;
|
122
|
1209
|
|
1210 #else
|
|
1211
|
|
1212 return NGX_CONF_OK;
|
|
1213
|
|
1214 #endif
|
0
|
1215 }
|
|
1216
|
|
1217
|
58
|
1218 static char *
|
|
1219 ngx_accept_mutex_check(ngx_conf_t *cf, void *post, void *data)
|
0
|
1220 {
|
|
1221 #if !(NGX_HAVE_ATOMIC_OPS)
|
|
1222
|
|
1223 ngx_flag_t *fp = data;
|
|
1224
|
|
1225 *fp = 0;
|
|
1226
|
|
1227 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
52
|
1228 "\"accept_mutex\" is not supported on this platform, "
|
|
1229 "ignored");
|
0
|
1230
|
|
1231 #endif
|
|
1232
|
|
1233 return NGX_CONF_OK;
|
|
1234 }
|