719
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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 #if (NGX_TEST_BUILD_EVENTPORT)
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13
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14 #define ushort_t u_short
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15 #define uint_t u_int
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16
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17 /* Solaris declarations */
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18
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19 #define PORT_SOURCE_AIO 1
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20 #define PORT_SOURCE_TIMER 2
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21 #define PORT_SOURCE_USER 3
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22 #define PORT_SOURCE_FD 4
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23 #define PORT_SOURCE_ALERT 5
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24 #define PORT_SOURCE_MQ 6
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25
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26 #define ETIME 64
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27
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28 #define SIGEV_PORT 4
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29
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30 typedef struct {
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31 int portev_events; /* event data is source specific */
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32 ushort_t portev_source; /* event source */
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33 ushort_t portev_pad; /* port internal use */
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34 uintptr_t portev_object; /* source specific object */
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35 void *portev_user; /* user cookie */
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36 } port_event_t;
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37
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38 typedef struct port_notify {
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39 int portnfy_port; /* bind request(s) to port */
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40 void *portnfy_user; /* user defined */
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41 } port_notify_t;
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42
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43 typedef struct itimerspec { /* definition per POSIX.4 */
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44 struct timespec it_interval; /* timer period */
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45 struct timespec it_value; /* timer expiration */
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46 } itimerspec_t;
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47
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48 int port_create(void)
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49 {
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50 return -1;
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51 }
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52
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53 int port_associate(int port, int source, uintptr_t object, int events,
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54 void *user)
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55 {
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56 return -1;
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57 }
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58
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59 int port_dissociate(int port, int source, uintptr_t object)
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60 {
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61 return -1;
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62 }
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63
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64 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget,
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65 struct timespec *timeout)
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66 {
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67 return -1;
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68 }
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69
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70 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
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71 {
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72 return -1;
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73 }
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74
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75 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
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76 struct itimerspec *ovalue)
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77 {
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78 return -1;
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79 }
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80
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81 int timer_delete(timer_t timerid)
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82 {
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83 return -1;
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84 }
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85
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86 #endif
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87
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88
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89 typedef struct {
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90 u_int events;
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91 } ngx_eventport_conf_t;
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92
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93
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94 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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95 static void ngx_eventport_done(ngx_cycle_t *cycle);
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96 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, int event,
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97 u_int flags);
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98 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, int event,
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99 u_int flags);
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100 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle,
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101 ngx_msec_t timer, ngx_uint_t flags);
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102
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103 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle);
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104 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf);
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105
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106 static int ep = -1;
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107 static port_event_t *event_list;
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108 static u_int nevents;
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109 static timer_t event_timer = -1;
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110
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111 static ngx_str_t eventport_name = ngx_string("eventport");
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112
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113
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114 static ngx_command_t ngx_eventport_commands[] = {
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115
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116 { ngx_string("eventport_events"),
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117 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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118 ngx_conf_set_num_slot,
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119 0,
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120 offsetof(ngx_eventport_conf_t, events),
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121 NULL },
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122
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123 ngx_null_command
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124 };
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125
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126
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127 ngx_event_module_t ngx_eventport_module_ctx = {
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128 &eventport_name,
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129 ngx_eventport_create_conf, /* create configuration */
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130 ngx_eventport_init_conf, /* init configuration */
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131
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132 {
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133 ngx_eventport_add_event, /* add an event */
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134 ngx_eventport_del_event, /* delete an event */
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135 ngx_eventport_add_event, /* enable an event */
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136 ngx_eventport_del_event, /* disable an event */
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137 NULL, /* add an connection */
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138 NULL, /* delete an connection */
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139 NULL, /* process the changes */
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140 ngx_eventport_process_events, /* process the events */
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141 ngx_eventport_init, /* init the events */
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142 ngx_eventport_done, /* done the events */
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143 }
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144
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145 };
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146
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147 ngx_module_t ngx_eventport_module = {
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148 NGX_MODULE_V1,
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149 &ngx_eventport_module_ctx, /* module context */
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150 ngx_eventport_commands, /* module directives */
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151 NGX_EVENT_MODULE, /* module type */
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152 NULL, /* init master */
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153 NULL, /* init module */
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154 NULL, /* init process */
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155 NULL, /* init thread */
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156 NULL, /* exit thread */
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157 NULL, /* exit process */
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158 NULL, /* exit master */
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159 NGX_MODULE_V1_PADDING
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160 };
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161
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162
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163 static ngx_int_t
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164 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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165 {
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166 port_notify_t pn;
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167 struct itimerspec its;
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168 struct sigevent sev;
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169 ngx_eventport_conf_t *epcf;
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170
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171 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module);
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172
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173 if (ep == -1) {
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174 ep = port_create();
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175
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176 if (ep == -1) {
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177 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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178 "port_create() failed");
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179 return NGX_ERROR;
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180 }
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181 }
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182
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183 if (nevents < epcf->events) {
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184 if (event_list) {
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185 ngx_free(event_list);
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186 }
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187
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188 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events,
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189 cycle->log);
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190 if (event_list == NULL) {
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191 return NGX_ERROR;
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192 }
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193 }
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194
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195 ngx_event_flags = NGX_USE_EVENTPORT_EVENT;
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196
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197 if (timer) {
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198 ngx_memzero(&pn, sizeof(port_notify_t));
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199 pn.portnfy_port = ep;
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200
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201 ngx_memzero(&sev, sizeof(struct sigevent));
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202 sev.sigev_notify = SIGEV_PORT;
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203 #if !(NGX_TEST_BUILD_EVENTPORT)
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204 sev.sigev_value.sival_ptr = &pn;
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205 #endif
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206
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207 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) {
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208 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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209 "timer_create() failed");
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210 return NGX_ERROR;
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211 }
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212
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213 its.it_interval.tv_sec = timer / 1000;
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214 its.it_interval.tv_nsec = (timer % 1000) * 1000000;
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215 its.it_value.tv_sec = timer / 1000;
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216 its.it_value.tv_nsec = (timer % 1000) * 1000000;
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217
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218 if (timer_settime(event_timer, 0, &its, NULL) == -1) {
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219 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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220 "timer_settime() failed");
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221 return NGX_ERROR;
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222 }
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223
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224 ngx_event_flags |= NGX_USE_TIMER_EVENT;
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225 }
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226
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227 nevents = epcf->events;
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228
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229 ngx_io = ngx_os_io;
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230
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231 ngx_event_actions = ngx_eventport_module_ctx.actions;
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232
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233 return NGX_OK;
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234 }
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235
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236
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237 static void
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238 ngx_eventport_done(ngx_cycle_t *cycle)
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239 {
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240 if (event_timer != -1) {
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241 if (timer_delete(event_timer) == -1) {
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242 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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243 "timer_delete() failed");
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244 }
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245
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246 event_timer = -1;
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247 }
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248
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249 if (close(ep) == -1) {
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250 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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251 "close() event port failed");
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252 }
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253
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254 ep = -1;
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255
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256 ngx_free(event_list);
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257
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258 event_list = NULL;
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259 nevents = 0;
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260 }
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261
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262
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263 static ngx_int_t
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264 ngx_eventport_add_event(ngx_event_t *ev, int event, u_int flags)
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265 {
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266 int events, prev;
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267 ngx_event_t *e;
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268 ngx_connection_t *c;
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269
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270 c = ev->data;
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271
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272 events = event;
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273
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274 if (event == NGX_READ_EVENT) {
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275 e = c->write;
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276 prev = POLLOUT;
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277 #if (NGX_READ_EVENT != POLLIN)
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278 events = POLLIN;
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279 #endif
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280
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281 } else {
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282 e = c->read;
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283 prev = POLLIN;
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284 #if (NGX_WRITE_EVENT != POLLOUT)
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285 events = POLLOUT;
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286 #endif
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287 }
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288
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289 if (e->oneshot) {
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290 events |= prev;
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291 }
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292
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293 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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294 "eventport add event: fd:%d ev:%04Xd", c->fd, events);
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295
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296 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events,
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297 (void *) ((uintptr_t) ev | ev->instance))
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298 == -1)
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299 {
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300 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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301 "port_associate() failed");
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302 return NGX_ERROR;
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303 }
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304
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305 ev->active = 1;
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306 ev->oneshot = 1;
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307
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308 return NGX_OK;
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309 }
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310
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311
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312 static ngx_int_t
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313 ngx_eventport_del_event(ngx_event_t *ev, int event, u_int flags)
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314 {
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315 ngx_event_t *e;
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316 ngx_connection_t *c;
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317
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318 /*
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319 * when the file descriptor is closed, the event port automatically
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320 * dissociates it from the port, so we do not need to dissociate explicity
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321 * the event before the closing the file descriptor
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322 */
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323
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324 if (flags & NGX_CLOSE_EVENT) {
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325 ev->active = 0;
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326 ev->oneshot = 0;
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327 return NGX_OK;
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328 }
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329
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330 c = ev->data;
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331
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332 if (event == NGX_READ_EVENT) {
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333 e = c->write;
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334 event = POLLOUT;
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335
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336 } else {
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337 e = c->read;
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338 event = POLLIN;
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339 }
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340
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341 if (e->oneshot) {
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342 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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343 "eventport change event: fd:%d ev:%04Xd", c->fd, event);
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344
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345 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event,
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346 (void *) ((uintptr_t) ev | ev->instance))
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347 == -1)
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348 {
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349 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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350 "port_associate() failed");
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351 return NGX_ERROR;
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352 }
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353
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354 } else {
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355 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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356 "eventport del event: fd:%d", c->fd);
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357
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358 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) {
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359 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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360 "port_dissociate() failed");
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361 return NGX_ERROR;
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362 }
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363 }
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364
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365 ev->active = 0;
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366 ev->oneshot = 0;
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367
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368 return NGX_OK;
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369 }
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370
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371
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372 ngx_int_t
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373 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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374 ngx_uint_t flags)
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375 {
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376 int n, revents;
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377 u_int events;
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378 ngx_err_t err;
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379 ngx_int_t instance;
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380 ngx_uint_t i, level;
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381 ngx_event_t *ev, *rev, *wev, **queue;
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382 ngx_connection_t *c;
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383 struct timespec ts, *tp;
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384
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385 if (timer == NGX_TIMER_INFINITE) {
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386 tp = NULL;
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387
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388 } else {
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389 ts.tv_sec = timer / 1000;
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390 ts.tv_nsec = (timer % 1000) * 1000000;
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391 tp = &ts;
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392 }
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393
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394 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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395 "eventport timer: %M", timer);
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396
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397 events = 1;
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398
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399 n = port_getn(ep, event_list, nevents, &events, tp);
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400
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401 err = ngx_errno;
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402
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403 if (flags & NGX_UPDATE_TIME) {
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404 ngx_time_update(0, 0);
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405 }
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406
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407 if (n == -1) {
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408 if (err == ETIME) {
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409 if (timer != NGX_TIMER_INFINITE) {
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410 return NGX_OK;
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411 }
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412
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413 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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414 "port_getn() returned no events without timeout");
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415 return NGX_ERROR;
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416 }
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417
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418 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT;
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419 ngx_log_error(level, cycle->log, err, "port_getn() failed");
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420 return NGX_ERROR;
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421 }
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422
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423 if (events == 0) {
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424 if (timer != NGX_TIMER_INFINITE) {
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425 return NGX_OK;
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426 }
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427
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428 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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429 "port_getn() returned no events without timeout");
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430 return NGX_ERROR;
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431 }
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432
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433 ngx_mutex_lock(ngx_posted_events_mutex);
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434
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435 for (i = 0; i < events; i++) {
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436
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437 if (event_list[i].portev_source == PORT_SOURCE_TIMER) {
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438 ngx_time_update(0, 0);
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439 continue;
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440 }
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441
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442 ev = event_list[i].portev_user;
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443
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444 switch (event_list[i].portev_source) {
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445
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446 case PORT_SOURCE_FD:
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447
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448 instance = (uintptr_t) ev & 1;
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449 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
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450
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451 if (ev->closed || ev->instance != instance) {
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452
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453 /*
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454 * the stale event from a file descriptor
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455 * that was just closed in this iteration
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456 */
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457
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458 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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459 "eventport: stale event %p", ev);
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460 continue;
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461 }
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462
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463 revents = event_list[i].portev_events;
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464
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465 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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466 "eventport: fd:%d, ev:%04Xd",
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467 event_list[i].portev_object, revents);
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468
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469 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
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470 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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471 "prot_getn() error fd:%d ev:%04Xd",
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472 event_list[i].portev_object, revents);
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473 }
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474
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475 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
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476 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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477 "strange port_getn() events fd:%d ev:%04Xd",
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478 event_list[i].portev_object, revents);
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479 }
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480
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481 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
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482 && (revents & (POLLIN|POLLOUT)) == 0)
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483 {
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484 /*
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485 * if the error events were returned without POLLIN or POLLOUT,
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486 * then add these flags to handle the events at least in one
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487 * active handler
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488 */
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489
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490 revents |= POLLIN|POLLOUT;
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491 }
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492
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493 c = ev->data;
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494 rev = c->read;
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495 wev = c->write;
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496
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497 rev->active = 0;
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498 wev->active = 0;
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499
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500 if (revents & POLLIN) {
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501
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502 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
503 rev->posted_ready = 1;
|
|
504
|
|
505 } else {
|
|
506 rev->ready = 1;
|
|
507 }
|
|
508
|
|
509 if (flags & NGX_POST_EVENTS) {
|
|
510 queue = (ngx_event_t **) (rev->accept ?
|
|
511 &ngx_posted_accept_events : &ngx_posted_events);
|
|
512
|
|
513 ngx_locked_post_event(rev, queue);
|
|
514
|
|
515 } else {
|
|
516 rev->handler(rev);
|
|
517 }
|
|
518
|
|
519 if (rev->accept) {
|
|
520 if (ngx_use_accept_mutex) {
|
|
521 ngx_accept_events = 1;
|
|
522 continue;
|
|
523 }
|
|
524
|
|
525 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN,
|
|
526 (void *) ((uintptr_t) ev | ev->instance))
|
|
527 == -1)
|
|
528 {
|
|
529 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
530 "port_associate() failed");
|
|
531 return NGX_ERROR;
|
|
532 }
|
|
533 }
|
|
534 }
|
|
535
|
|
536 if (revents & POLLOUT) {
|
|
537
|
|
538 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
539 wev->posted_ready = 1;
|
|
540
|
|
541 } else {
|
|
542 wev->ready = 1;
|
|
543 }
|
|
544
|
|
545 if (flags & NGX_POST_EVENTS) {
|
|
546 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
547
|
|
548 } else {
|
|
549 wev->handler(wev);
|
|
550 }
|
|
551 }
|
|
552
|
|
553 continue;
|
|
554
|
|
555 default:
|
|
556 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
557 "unexpected even_port object %d",
|
|
558 event_list[i].portev_object);
|
|
559 continue;
|
|
560 }
|
|
561 }
|
|
562
|
|
563 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
564
|
|
565 return NGX_OK;
|
|
566 }
|
|
567
|
|
568
|
|
569 static void *
|
|
570 ngx_eventport_create_conf(ngx_cycle_t *cycle)
|
|
571 {
|
|
572 ngx_eventport_conf_t *epcf;
|
|
573
|
|
574 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t));
|
|
575 if (epcf == NULL) {
|
|
576 return NGX_CONF_ERROR;
|
|
577 }
|
|
578
|
|
579 epcf->events = NGX_CONF_UNSET;
|
|
580
|
|
581 return epcf;
|
|
582 }
|
|
583
|
|
584
|
|
585 static char *
|
|
586 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
587 {
|
|
588 ngx_eventport_conf_t *epcf = conf;
|
|
589
|
|
590 ngx_conf_init_uint_value(epcf->events, 32);
|
|
591
|
|
592 return NGX_CONF_OK;
|
|
593 }
|