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236
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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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370
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43 #if (__FreeBSD_version < 700005)
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44
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45 typedef struct itimerspec { /* definition per POSIX.4 */
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46 struct timespec it_interval;/* timer period */
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47 struct timespec it_value; /* timer expiration */
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48 } itimerspec_t;
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49
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50 #endif
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51
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236
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52 int port_create(void)
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53 {
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54 return -1;
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55 }
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56
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57 int port_associate(int port, int source, uintptr_t object, int events,
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58 void *user)
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59 {
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60 return -1;
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61 }
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62
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63 int port_dissociate(int port, int source, uintptr_t object)
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64 {
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65 return -1;
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66 }
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67
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68 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget,
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69 struct timespec *timeout)
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70 {
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71 return -1;
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72 }
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73
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74 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
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75 {
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76 return -1;
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77 }
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78
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79 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
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80 struct itimerspec *ovalue)
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81 {
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82 return -1;
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83 }
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84
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85 int timer_delete(timer_t timerid)
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86 {
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87 return -1;
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88 }
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89
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90 #endif
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91
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92
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93 typedef struct {
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324
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94 ngx_uint_t events;
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236
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95 } ngx_eventport_conf_t;
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96
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97
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98 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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99 static void ngx_eventport_done(ngx_cycle_t *cycle);
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324
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100 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event,
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101 ngx_uint_t flags);
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102 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event,
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103 ngx_uint_t flags);
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236
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104 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle,
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105 ngx_msec_t timer, ngx_uint_t flags);
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106
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107 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle);
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108 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf);
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109
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110 static int ep = -1;
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111 static port_event_t *event_list;
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324
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112 static ngx_uint_t nevents;
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364
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113 static timer_t event_timer = (timer_t) -1;
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236
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114
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115 static ngx_str_t eventport_name = ngx_string("eventport");
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116
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117
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118 static ngx_command_t ngx_eventport_commands[] = {
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119
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120 { ngx_string("eventport_events"),
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121 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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122 ngx_conf_set_num_slot,
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123 0,
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124 offsetof(ngx_eventport_conf_t, events),
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125 NULL },
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126
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127 ngx_null_command
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128 };
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129
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130
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131 ngx_event_module_t ngx_eventport_module_ctx = {
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132 &eventport_name,
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133 ngx_eventport_create_conf, /* create configuration */
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134 ngx_eventport_init_conf, /* init configuration */
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135
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136 {
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137 ngx_eventport_add_event, /* add an event */
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138 ngx_eventport_del_event, /* delete an event */
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139 ngx_eventport_add_event, /* enable an event */
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140 ngx_eventport_del_event, /* disable an event */
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141 NULL, /* add an connection */
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142 NULL, /* delete an connection */
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143 NULL, /* process the changes */
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144 ngx_eventport_process_events, /* process the events */
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145 ngx_eventport_init, /* init the events */
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146 ngx_eventport_done, /* done the events */
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147 }
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148
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149 };
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150
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151 ngx_module_t ngx_eventport_module = {
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152 NGX_MODULE_V1,
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153 &ngx_eventport_module_ctx, /* module context */
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154 ngx_eventport_commands, /* module directives */
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155 NGX_EVENT_MODULE, /* module type */
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156 NULL, /* init master */
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157 NULL, /* init module */
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158 NULL, /* init process */
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159 NULL, /* init thread */
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160 NULL, /* exit thread */
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161 NULL, /* exit process */
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162 NULL, /* exit master */
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163 NGX_MODULE_V1_PADDING
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164 };
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165
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166
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167 static ngx_int_t
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168 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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169 {
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170 port_notify_t pn;
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171 struct itimerspec its;
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172 struct sigevent sev;
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173 ngx_eventport_conf_t *epcf;
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174
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175 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module);
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176
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177 if (ep == -1) {
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178 ep = port_create();
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179
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180 if (ep == -1) {
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181 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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182 "port_create() failed");
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183 return NGX_ERROR;
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184 }
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185 }
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186
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187 if (nevents < epcf->events) {
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188 if (event_list) {
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189 ngx_free(event_list);
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190 }
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191
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192 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events,
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193 cycle->log);
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194 if (event_list == NULL) {
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195 return NGX_ERROR;
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196 }
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197 }
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198
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199 ngx_event_flags = NGX_USE_EVENTPORT_EVENT;
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200
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201 if (timer) {
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202 ngx_memzero(&pn, sizeof(port_notify_t));
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203 pn.portnfy_port = ep;
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204
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205 ngx_memzero(&sev, sizeof(struct sigevent));
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206 sev.sigev_notify = SIGEV_PORT;
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207 #if !(NGX_TEST_BUILD_EVENTPORT)
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208 sev.sigev_value.sival_ptr = &pn;
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209 #endif
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210
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211 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) {
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212 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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213 "timer_create() failed");
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214 return NGX_ERROR;
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215 }
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216
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217 its.it_interval.tv_sec = timer / 1000;
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218 its.it_interval.tv_nsec = (timer % 1000) * 1000000;
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219 its.it_value.tv_sec = timer / 1000;
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220 its.it_value.tv_nsec = (timer % 1000) * 1000000;
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221
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222 if (timer_settime(event_timer, 0, &its, NULL) == -1) {
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223 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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224 "timer_settime() failed");
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225 return NGX_ERROR;
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226 }
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227
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228 ngx_event_flags |= NGX_USE_TIMER_EVENT;
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229 }
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230
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231 nevents = epcf->events;
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232
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233 ngx_io = ngx_os_io;
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234
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235 ngx_event_actions = ngx_eventport_module_ctx.actions;
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236
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237 return NGX_OK;
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238 }
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239
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240
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241 static void
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242 ngx_eventport_done(ngx_cycle_t *cycle)
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243 {
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364
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244 if (event_timer != (timer_t) -1) {
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236
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245 if (timer_delete(event_timer) == -1) {
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246 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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247 "timer_delete() failed");
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248 }
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249
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364
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250 event_timer = (timer_t) -1;
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236
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251 }
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252
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253 if (close(ep) == -1) {
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254 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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255 "close() event port failed");
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256 }
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257
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258 ep = -1;
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259
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260 ngx_free(event_list);
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261
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262 event_list = NULL;
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263 nevents = 0;
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264 }
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265
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266
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267 static ngx_int_t
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324
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268 ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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236
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269 {
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324
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270 ngx_int_t events, prev;
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236
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271 ngx_event_t *e;
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272 ngx_connection_t *c;
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273
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274 c = ev->data;
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275
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276 events = event;
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277
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278 if (event == NGX_READ_EVENT) {
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279 e = c->write;
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280 prev = POLLOUT;
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281 #if (NGX_READ_EVENT != POLLIN)
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282 events = POLLIN;
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283 #endif
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284
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285 } else {
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286 e = c->read;
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287 prev = POLLIN;
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288 #if (NGX_WRITE_EVENT != POLLOUT)
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289 events = POLLOUT;
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290 #endif
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291 }
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292
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293 if (e->oneshot) {
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294 events |= prev;
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295 }
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296
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297 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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298 "eventport add event: fd:%d ev:%04Xi", c->fd, events);
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236
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299
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300 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events,
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301 (void *) ((uintptr_t) ev | ev->instance))
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302 == -1)
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303 {
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304 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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305 "port_associate() failed");
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306 return NGX_ERROR;
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307 }
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308
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309 ev->active = 1;
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310 ev->oneshot = 1;
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311
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312 return NGX_OK;
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313 }
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314
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315
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316 static ngx_int_t
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324
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317 ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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236
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318 {
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319 ngx_event_t *e;
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320 ngx_connection_t *c;
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321
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322 /*
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323 * when the file descriptor is closed, the event port automatically
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324 * dissociates it from the port, so we do not need to dissociate explicity
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325 * the event before the closing the file descriptor
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326 */
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327
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328 if (flags & NGX_CLOSE_EVENT) {
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329 ev->active = 0;
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330 ev->oneshot = 0;
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331 return NGX_OK;
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332 }
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333
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334 c = ev->data;
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335
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336 if (event == NGX_READ_EVENT) {
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337 e = c->write;
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338 event = POLLOUT;
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339
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340 } else {
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341 e = c->read;
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342 event = POLLIN;
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343 }
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344
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345 if (e->oneshot) {
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346 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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347 "eventport change event: fd:%d ev:%04Xi", c->fd, event);
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236
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348
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349 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event,
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350 (void *) ((uintptr_t) ev | ev->instance))
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351 == -1)
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352 {
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353 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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354 "port_associate() failed");
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355 return NGX_ERROR;
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356 }
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357
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358 } else {
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359 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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360 "eventport del event: fd:%d", c->fd);
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361
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362 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) {
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363 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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364 "port_dissociate() failed");
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365 return NGX_ERROR;
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366 }
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367 }
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368
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369 ev->active = 0;
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370 ev->oneshot = 0;
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371
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372 return NGX_OK;
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373 }
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374
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375
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376 ngx_int_t
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377 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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378 ngx_uint_t flags)
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379 {
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380 int n, revents;
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381 u_int events;
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382 ngx_err_t err;
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383 ngx_int_t instance;
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384 ngx_uint_t i, level;
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385 ngx_event_t *ev, *rev, *wev, **queue;
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386 ngx_connection_t *c;
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387 struct timespec ts, *tp;
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388
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389 if (timer == NGX_TIMER_INFINITE) {
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390 tp = NULL;
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391
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392 } else {
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393 ts.tv_sec = timer / 1000;
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394 ts.tv_nsec = (timer % 1000) * 1000000;
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395 tp = &ts;
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396 }
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397
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398 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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399 "eventport timer: %M", timer);
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400
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401 events = 1;
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402
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324
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403 n = port_getn(ep, event_list, (u_int) nevents, &events, tp);
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236
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404
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405 err = ngx_errno;
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406
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407 if (flags & NGX_UPDATE_TIME) {
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408 ngx_time_update(0, 0);
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409 }
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410
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411 if (n == -1) {
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412 if (err == ETIME) {
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413 if (timer != NGX_TIMER_INFINITE) {
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414 return NGX_OK;
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415 }
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416
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417 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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418 "port_getn() returned no events without timeout");
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419 return NGX_ERROR;
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420 }
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421
|
|
|
422 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT;
|
|
|
423 ngx_log_error(level, cycle->log, err, "port_getn() failed");
|
|
|
424 return NGX_ERROR;
|
|
|
425 }
|
|
|
426
|
|
|
427 if (events == 0) {
|
|
|
428 if (timer != NGX_TIMER_INFINITE) {
|
|
|
429 return NGX_OK;
|
|
|
430 }
|
|
|
431
|
|
|
432 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
433 "port_getn() returned no events without timeout");
|
|
|
434 return NGX_ERROR;
|
|
|
435 }
|
|
|
436
|
|
|
437 ngx_mutex_lock(ngx_posted_events_mutex);
|
|
|
438
|
|
|
439 for (i = 0; i < events; i++) {
|
|
|
440
|
|
|
441 if (event_list[i].portev_source == PORT_SOURCE_TIMER) {
|
|
|
442 ngx_time_update(0, 0);
|
|
|
443 continue;
|
|
|
444 }
|
|
|
445
|
|
|
446 ev = event_list[i].portev_user;
|
|
|
447
|
|
|
448 switch (event_list[i].portev_source) {
|
|
|
449
|
|
|
450 case PORT_SOURCE_FD:
|
|
|
451
|
|
|
452 instance = (uintptr_t) ev & 1;
|
|
|
453 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
|
|
|
454
|
|
|
455 if (ev->closed || ev->instance != instance) {
|
|
|
456
|
|
|
457 /*
|
|
|
458 * the stale event from a file descriptor
|
|
|
459 * that was just closed in this iteration
|
|
|
460 */
|
|
|
461
|
|
|
462 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
463 "eventport: stale event %p", ev);
|
|
|
464 continue;
|
|
|
465 }
|
|
|
466
|
|
|
467 revents = event_list[i].portev_events;
|
|
|
468
|
|
|
469 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
470 "eventport: fd:%d, ev:%04Xd",
|
|
|
471 event_list[i].portev_object, revents);
|
|
|
472
|
|
|
473 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
|
|
290
|
474 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
475 "port_getn() error fd:%d ev:%04Xd",
|
|
|
476 event_list[i].portev_object, revents);
|
|
236
|
477 }
|
|
|
478
|
|
|
479 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
|
|
|
480 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
481 "strange port_getn() events fd:%d ev:%04Xd",
|
|
|
482 event_list[i].portev_object, revents);
|
|
|
483 }
|
|
|
484
|
|
|
485 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
|
|
|
486 && (revents & (POLLIN|POLLOUT)) == 0)
|
|
|
487 {
|
|
|
488 /*
|
|
|
489 * if the error events were returned without POLLIN or POLLOUT,
|
|
|
490 * then add these flags to handle the events at least in one
|
|
|
491 * active handler
|
|
|
492 */
|
|
|
493
|
|
|
494 revents |= POLLIN|POLLOUT;
|
|
|
495 }
|
|
|
496
|
|
|
497 c = ev->data;
|
|
|
498 rev = c->read;
|
|
|
499 wev = c->write;
|
|
|
500
|
|
|
501 rev->active = 0;
|
|
|
502 wev->active = 0;
|
|
|
503
|
|
|
504 if (revents & POLLIN) {
|
|
244
|
505
|
|
236
|
506 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
|
507 rev->posted_ready = 1;
|
|
|
508
|
|
|
509 } else {
|
|
|
510 rev->ready = 1;
|
|
|
511 }
|
|
|
512
|
|
|
513 if (flags & NGX_POST_EVENTS) {
|
|
|
514 queue = (ngx_event_t **) (rev->accept ?
|
|
|
515 &ngx_posted_accept_events : &ngx_posted_events);
|
|
|
516
|
|
|
517 ngx_locked_post_event(rev, queue);
|
|
|
518
|
|
|
519 } else {
|
|
|
520 rev->handler(rev);
|
|
318
|
521
|
|
|
522 if (ev->closed) {
|
|
|
523 continue;
|
|
|
524 }
|
|
236
|
525 }
|
|
|
526
|
|
|
527 if (rev->accept) {
|
|
|
528 if (ngx_use_accept_mutex) {
|
|
|
529 ngx_accept_events = 1;
|
|
|
530 continue;
|
|
|
531 }
|
|
|
532
|
|
|
533 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN,
|
|
|
534 (void *) ((uintptr_t) ev | ev->instance))
|
|
|
535 == -1)
|
|
|
536 {
|
|
|
537 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
538 "port_associate() failed");
|
|
|
539 return NGX_ERROR;
|
|
|
540 }
|
|
|
541 }
|
|
|
542 }
|
|
|
543
|
|
|
544 if (revents & POLLOUT) {
|
|
|
545
|
|
|
546 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
|
547 wev->posted_ready = 1;
|
|
|
548
|
|
|
549 } else {
|
|
|
550 wev->ready = 1;
|
|
|
551 }
|
|
|
552
|
|
|
553 if (flags & NGX_POST_EVENTS) {
|
|
|
554 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
|
555
|
|
|
556 } else {
|
|
|
557 wev->handler(wev);
|
|
|
558 }
|
|
|
559 }
|
|
|
560
|
|
|
561 continue;
|
|
|
562
|
|
|
563 default:
|
|
|
564 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
565 "unexpected even_port object %d",
|
|
|
566 event_list[i].portev_object);
|
|
|
567 continue;
|
|
|
568 }
|
|
|
569 }
|
|
|
570
|
|
|
571 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
572
|
|
|
573 return NGX_OK;
|
|
|
574 }
|
|
|
575
|
|
|
576
|
|
|
577 static void *
|
|
|
578 ngx_eventport_create_conf(ngx_cycle_t *cycle)
|
|
|
579 {
|
|
|
580 ngx_eventport_conf_t *epcf;
|
|
|
581
|
|
|
582 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t));
|
|
|
583 if (epcf == NULL) {
|
|
496
|
584 return NULL;
|
|
236
|
585 }
|
|
|
586
|
|
|
587 epcf->events = NGX_CONF_UNSET;
|
|
|
588
|
|
|
589 return epcf;
|
|
|
590 }
|
|
|
591
|
|
|
592
|
|
|
593 static char *
|
|
|
594 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
|
595 {
|
|
|
596 ngx_eventport_conf_t *epcf = conf;
|
|
|
597
|
|
|
598 ngx_conf_init_uint_value(epcf->events, 32);
|
|
|
599
|
|
|
600 return NGX_CONF_OK;
|
|
|
601 }
|
