236
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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236
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_event.h>
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11
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12
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13 #if (NGX_TEST_BUILD_EVENTPORT)
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14
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15 #define ushort_t u_short
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16 #define uint_t u_int
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17
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682
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18 #ifndef CLOCK_REALTIME
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19 #define CLOCK_REALTIME 0
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20 typedef int clockid_t;
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21 typedef void * timer_t;
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22 #endif
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23
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236
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24 /* Solaris declarations */
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25
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26 #define PORT_SOURCE_AIO 1
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27 #define PORT_SOURCE_TIMER 2
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28 #define PORT_SOURCE_USER 3
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29 #define PORT_SOURCE_FD 4
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30 #define PORT_SOURCE_ALERT 5
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31 #define PORT_SOURCE_MQ 6
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32
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682
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33 #ifndef ETIME
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236
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34 #define ETIME 64
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682
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35 #endif
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236
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36
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37 #define SIGEV_PORT 4
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38
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39 typedef struct {
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40 int portev_events; /* event data is source specific */
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41 ushort_t portev_source; /* event source */
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42 ushort_t portev_pad; /* port internal use */
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43 uintptr_t portev_object; /* source specific object */
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44 void *portev_user; /* user cookie */
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45 } port_event_t;
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46
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47 typedef struct port_notify {
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48 int portnfy_port; /* bind request(s) to port */
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49 void *portnfy_user; /* user defined */
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50 } port_notify_t;
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51
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370
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52 #if (__FreeBSD_version < 700005)
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53
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54 typedef struct itimerspec { /* definition per POSIX.4 */
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55 struct timespec it_interval;/* timer period */
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56 struct timespec it_value; /* timer expiration */
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57 } itimerspec_t;
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58
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59 #endif
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60
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682
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61 int port_create(void);
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62
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236
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63 int port_create(void)
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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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682
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68
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69 int port_associate(int port, int source, uintptr_t object, int events,
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70 void *user);
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71
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236
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72 int port_associate(int port, int source, uintptr_t object, int events,
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73 void *user)
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74 {
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75 return -1;
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76 }
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77
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682
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78
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79 int port_dissociate(int port, int source, uintptr_t object);
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80
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236
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81 int port_dissociate(int port, int source, uintptr_t object)
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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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682
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86
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87 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget,
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88 struct timespec *timeout);
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89
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236
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90 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget,
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91 struct timespec *timeout)
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92 {
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93 return -1;
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94 }
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95
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682
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96
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97 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid);
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98
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236
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99 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
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100 {
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101 return -1;
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102 }
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103
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682
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104
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105 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
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106 struct itimerspec *ovalue);
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107
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236
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108 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
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109 struct itimerspec *ovalue)
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110 {
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111 return -1;
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112 }
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113
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682
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114
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115 int timer_delete(timer_t timerid);
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116
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236
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117 int timer_delete(timer_t timerid)
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118 {
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119 return -1;
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120 }
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121
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122 #endif
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123
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124
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125 typedef struct {
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324
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126 ngx_uint_t events;
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236
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127 } ngx_eventport_conf_t;
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128
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129
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130 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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131 static void ngx_eventport_done(ngx_cycle_t *cycle);
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324
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132 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event,
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133 ngx_uint_t flags);
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134 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event,
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135 ngx_uint_t flags);
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236
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136 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle,
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137 ngx_msec_t timer, ngx_uint_t flags);
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138
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139 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle);
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140 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf);
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141
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142 static int ep = -1;
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143 static port_event_t *event_list;
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324
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144 static ngx_uint_t nevents;
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364
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145 static timer_t event_timer = (timer_t) -1;
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236
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146
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147 static ngx_str_t eventport_name = ngx_string("eventport");
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148
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149
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150 static ngx_command_t ngx_eventport_commands[] = {
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151
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152 { ngx_string("eventport_events"),
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153 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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154 ngx_conf_set_num_slot,
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155 0,
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156 offsetof(ngx_eventport_conf_t, events),
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157 NULL },
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158
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159 ngx_null_command
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160 };
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161
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162
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163 ngx_event_module_t ngx_eventport_module_ctx = {
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164 &eventport_name,
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165 ngx_eventport_create_conf, /* create configuration */
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166 ngx_eventport_init_conf, /* init configuration */
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167
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168 {
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169 ngx_eventport_add_event, /* add an event */
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170 ngx_eventport_del_event, /* delete an event */
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171 ngx_eventport_add_event, /* enable an event */
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172 ngx_eventport_del_event, /* disable an event */
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173 NULL, /* add an connection */
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174 NULL, /* delete an connection */
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175 NULL, /* process the changes */
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176 ngx_eventport_process_events, /* process the events */
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177 ngx_eventport_init, /* init the events */
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178 ngx_eventport_done, /* done the events */
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179 }
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180
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181 };
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182
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183 ngx_module_t ngx_eventport_module = {
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184 NGX_MODULE_V1,
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185 &ngx_eventport_module_ctx, /* module context */
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186 ngx_eventport_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 NULL, /* init module */
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190 NULL, /* 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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196 };
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197
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198
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199 static ngx_int_t
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200 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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201 {
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202 port_notify_t pn;
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203 struct itimerspec its;
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204 struct sigevent sev;
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205 ngx_eventport_conf_t *epcf;
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206
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207 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module);
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208
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209 if (ep == -1) {
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210 ep = port_create();
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211
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212 if (ep == -1) {
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213 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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214 "port_create() failed");
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215 return NGX_ERROR;
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216 }
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217 }
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218
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219 if (nevents < epcf->events) {
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220 if (event_list) {
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221 ngx_free(event_list);
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222 }
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223
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224 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events,
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225 cycle->log);
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226 if (event_list == NULL) {
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227 return NGX_ERROR;
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228 }
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229 }
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230
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231 ngx_event_flags = NGX_USE_EVENTPORT_EVENT;
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232
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233 if (timer) {
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234 ngx_memzero(&pn, sizeof(port_notify_t));
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235 pn.portnfy_port = ep;
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236
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237 ngx_memzero(&sev, sizeof(struct sigevent));
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238 sev.sigev_notify = SIGEV_PORT;
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239 #if !(NGX_TEST_BUILD_EVENTPORT)
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240 sev.sigev_value.sival_ptr = &pn;
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241 #endif
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242
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243 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) {
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244 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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245 "timer_create() failed");
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246 return NGX_ERROR;
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247 }
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248
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249 its.it_interval.tv_sec = timer / 1000;
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250 its.it_interval.tv_nsec = (timer % 1000) * 1000000;
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251 its.it_value.tv_sec = timer / 1000;
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252 its.it_value.tv_nsec = (timer % 1000) * 1000000;
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253
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254 if (timer_settime(event_timer, 0, &its, NULL) == -1) {
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255 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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256 "timer_settime() failed");
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257 return NGX_ERROR;
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258 }
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259
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260 ngx_event_flags |= NGX_USE_TIMER_EVENT;
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261 }
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262
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263 nevents = epcf->events;
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264
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265 ngx_io = ngx_os_io;
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266
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267 ngx_event_actions = ngx_eventport_module_ctx.actions;
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268
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269 return NGX_OK;
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270 }
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271
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272
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273 static void
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274 ngx_eventport_done(ngx_cycle_t *cycle)
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275 {
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364
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276 if (event_timer != (timer_t) -1) {
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236
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277 if (timer_delete(event_timer) == -1) {
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278 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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279 "timer_delete() failed");
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280 }
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281
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364
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282 event_timer = (timer_t) -1;
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236
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283 }
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284
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285 if (close(ep) == -1) {
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286 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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287 "close() event port failed");
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288 }
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289
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290 ep = -1;
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291
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292 ngx_free(event_list);
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293
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294 event_list = NULL;
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295 nevents = 0;
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296 }
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297
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298
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299 static ngx_int_t
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324
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300 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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301 {
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324
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302 ngx_int_t events, prev;
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236
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303 ngx_event_t *e;
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304 ngx_connection_t *c;
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305
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306 c = ev->data;
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307
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308 events = event;
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309
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310 if (event == NGX_READ_EVENT) {
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311 e = c->write;
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312 prev = POLLOUT;
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313 #if (NGX_READ_EVENT != POLLIN)
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314 events = POLLIN;
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315 #endif
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316
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317 } else {
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318 e = c->read;
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319 prev = POLLIN;
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320 #if (NGX_WRITE_EVENT != POLLOUT)
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321 events = POLLOUT;
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322 #endif
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323 }
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324
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325 if (e->oneshot) {
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326 events |= prev;
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327 }
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328
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329 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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330 "eventport add event: fd:%d ev:%04Xi", c->fd, events);
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236
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331
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332 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events,
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333 (void *) ((uintptr_t) ev | ev->instance))
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334 == -1)
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335 {
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336 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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337 "port_associate() failed");
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338 return NGX_ERROR;
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339 }
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340
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341 ev->active = 1;
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342 ev->oneshot = 1;
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343
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344 return NGX_OK;
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345 }
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346
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347
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348 static ngx_int_t
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324
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349 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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350 {
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351 ngx_event_t *e;
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352 ngx_connection_t *c;
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353
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354 /*
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355 * when the file descriptor is closed, the event port automatically
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356 * dissociates it from the port, so we do not need to dissociate explicitly
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236
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357 * the event before the closing the file descriptor
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358 */
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359
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360 if (flags & NGX_CLOSE_EVENT) {
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361 ev->active = 0;
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362 ev->oneshot = 0;
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363 return NGX_OK;
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364 }
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365
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366 c = ev->data;
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367
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368 if (event == NGX_READ_EVENT) {
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369 e = c->write;
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370 event = POLLOUT;
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371
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372 } else {
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373 e = c->read;
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374 event = POLLIN;
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375 }
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376
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377 if (e->oneshot) {
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378 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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379 "eventport change event: fd:%d ev:%04Xi", c->fd, event);
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236
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380
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381 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event,
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382 (void *) ((uintptr_t) ev | ev->instance))
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383 == -1)
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384 {
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385 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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386 "port_associate() failed");
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387 return NGX_ERROR;
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388 }
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389
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390 } else {
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391 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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392 "eventport del event: fd:%d", c->fd);
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393
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394 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) {
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395 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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396 "port_dissociate() failed");
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397 return NGX_ERROR;
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398 }
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399 }
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400
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401 ev->active = 0;
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402 ev->oneshot = 0;
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403
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404 return NGX_OK;
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405 }
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406
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407
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408 ngx_int_t
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409 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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410 ngx_uint_t flags)
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411 {
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412 int n, revents;
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413 u_int events;
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414 ngx_err_t err;
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415 ngx_int_t instance;
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416 ngx_uint_t i, level;
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417 ngx_event_t *ev, *rev, *wev, **queue;
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418 ngx_connection_t *c;
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419 struct timespec ts, *tp;
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420
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421 if (timer == NGX_TIMER_INFINITE) {
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422 tp = NULL;
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423
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424 } else {
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425 ts.tv_sec = timer / 1000;
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426 ts.tv_nsec = (timer % 1000) * 1000000;
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427 tp = &ts;
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428 }
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429
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430 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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431 "eventport timer: %M", timer);
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432
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433 events = 1;
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434
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324
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435 n = port_getn(ep, event_list, (u_int) nevents, &events, tp);
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236
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436
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437 err = ngx_errno;
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438
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439 if (flags & NGX_UPDATE_TIME) {
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566
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440 ngx_time_update();
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236
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441 }
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442
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443 if (n == -1) {
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444 if (err == ETIME) {
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445 if (timer != NGX_TIMER_INFINITE) {
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446 return NGX_OK;
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447 }
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448
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449 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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450 "port_getn() returned no events without timeout");
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451 return NGX_ERROR;
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452 }
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453
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454 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT;
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455 ngx_log_error(level, cycle->log, err, "port_getn() failed");
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456 return NGX_ERROR;
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457 }
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458
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459 if (events == 0) {
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460 if (timer != NGX_TIMER_INFINITE) {
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461 return NGX_OK;
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462 }
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463
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464 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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465 "port_getn() returned no events without timeout");
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466 return NGX_ERROR;
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467 }
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468
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469 ngx_mutex_lock(ngx_posted_events_mutex);
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470
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471 for (i = 0; i < events; i++) {
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472
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473 if (event_list[i].portev_source == PORT_SOURCE_TIMER) {
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566
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474 ngx_time_update();
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236
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475 continue;
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476 }
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477
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478 ev = event_list[i].portev_user;
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479
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480 switch (event_list[i].portev_source) {
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481
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482 case PORT_SOURCE_FD:
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483
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484 instance = (uintptr_t) ev & 1;
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485 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
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486
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487 if (ev->closed || ev->instance != instance) {
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488
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489 /*
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490 * the stale event from a file descriptor
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491 * that was just closed in this iteration
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492 */
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493
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494 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
495 "eventport: stale event %p", ev);
|
|
496 continue;
|
|
497 }
|
|
498
|
|
499 revents = event_list[i].portev_events;
|
|
500
|
|
501 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
502 "eventport: fd:%d, ev:%04Xd",
|
|
503 event_list[i].portev_object, revents);
|
|
504
|
|
505 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
|
290
|
506 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
507 "port_getn() error fd:%d ev:%04Xd",
|
|
508 event_list[i].portev_object, revents);
|
236
|
509 }
|
|
510
|
|
511 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
|
|
512 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
513 "strange port_getn() events fd:%d ev:%04Xd",
|
|
514 event_list[i].portev_object, revents);
|
|
515 }
|
|
516
|
|
517 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
|
|
518 && (revents & (POLLIN|POLLOUT)) == 0)
|
|
519 {
|
|
520 /*
|
|
521 * if the error events were returned without POLLIN or POLLOUT,
|
|
522 * then add these flags to handle the events at least in one
|
|
523 * active handler
|
|
524 */
|
|
525
|
|
526 revents |= POLLIN|POLLOUT;
|
|
527 }
|
|
528
|
|
529 c = ev->data;
|
|
530 rev = c->read;
|
|
531 wev = c->write;
|
|
532
|
|
533 rev->active = 0;
|
|
534 wev->active = 0;
|
|
535
|
|
536 if (revents & POLLIN) {
|
244
|
537
|
236
|
538 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
539 rev->posted_ready = 1;
|
|
540
|
|
541 } else {
|
|
542 rev->ready = 1;
|
|
543 }
|
|
544
|
|
545 if (flags & NGX_POST_EVENTS) {
|
|
546 queue = (ngx_event_t **) (rev->accept ?
|
|
547 &ngx_posted_accept_events : &ngx_posted_events);
|
|
548
|
|
549 ngx_locked_post_event(rev, queue);
|
|
550
|
|
551 } else {
|
|
552 rev->handler(rev);
|
318
|
553
|
|
554 if (ev->closed) {
|
|
555 continue;
|
|
556 }
|
236
|
557 }
|
|
558
|
|
559 if (rev->accept) {
|
|
560 if (ngx_use_accept_mutex) {
|
|
561 ngx_accept_events = 1;
|
|
562 continue;
|
|
563 }
|
|
564
|
|
565 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN,
|
|
566 (void *) ((uintptr_t) ev | ev->instance))
|
|
567 == -1)
|
|
568 {
|
|
569 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
570 "port_associate() failed");
|
|
571 return NGX_ERROR;
|
|
572 }
|
|
573 }
|
|
574 }
|
|
575
|
|
576 if (revents & POLLOUT) {
|
|
577
|
|
578 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
579 wev->posted_ready = 1;
|
|
580
|
|
581 } else {
|
|
582 wev->ready = 1;
|
|
583 }
|
|
584
|
|
585 if (flags & NGX_POST_EVENTS) {
|
|
586 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
587
|
|
588 } else {
|
|
589 wev->handler(wev);
|
|
590 }
|
|
591 }
|
|
592
|
|
593 continue;
|
|
594
|
|
595 default:
|
|
596 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
597 "unexpected even_port object %d",
|
|
598 event_list[i].portev_object);
|
|
599 continue;
|
|
600 }
|
|
601 }
|
|
602
|
|
603 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
604
|
|
605 return NGX_OK;
|
|
606 }
|
|
607
|
|
608
|
|
609 static void *
|
|
610 ngx_eventport_create_conf(ngx_cycle_t *cycle)
|
|
611 {
|
|
612 ngx_eventport_conf_t *epcf;
|
|
613
|
|
614 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t));
|
|
615 if (epcf == NULL) {
|
496
|
616 return NULL;
|
236
|
617 }
|
|
618
|
|
619 epcf->events = NGX_CONF_UNSET;
|
|
620
|
|
621 return epcf;
|
|
622 }
|
|
623
|
|
624
|
|
625 static char *
|
|
626 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
627 {
|
|
628 ngx_eventport_conf_t *epcf = conf;
|
|
629
|
|
630 ngx_conf_init_uint_value(epcf->events, 32);
|
|
631
|
|
632 return NGX_CONF_OK;
|
|
633 }
|