0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10
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11
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18
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12 #if (NGX_TEST_BUILD_EPOLL)
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0
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13
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14 /* epoll declarations */
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15
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16 #define EPOLLIN 0x001
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17 #define EPOLLPRI 0x002
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18 #define EPOLLOUT 0x004
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19 #define EPOLLRDNORM 0x040
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20 #define EPOLLRDBAND 0x080
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21 #define EPOLLWRNORM 0x100
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22 #define EPOLLWRBAND 0x200
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23 #define EPOLLMSG 0x400
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24 #define EPOLLERR 0x008
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25 #define EPOLLHUP 0x010
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26
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27 #define EPOLLET 0x80000000
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28 #define EPOLLONESHOT 0x40000000
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29
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30 #define EPOLL_CTL_ADD 1
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31 #define EPOLL_CTL_DEL 2
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32 #define EPOLL_CTL_MOD 3
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33
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34 typedef union epoll_data {
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35 void *ptr;
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36 int fd;
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37 uint32_t u32;
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38 uint64_t u64;
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39 } epoll_data_t;
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40
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41 struct epoll_event {
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42 uint32_t events;
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43 epoll_data_t data;
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44 };
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45
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46 int epoll_create(int size)
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47 {
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48 return -1;
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49 }
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50
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51 int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
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52 {
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53 return -1;
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54 }
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55
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56 int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout)
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57 {
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58 return -1;
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59 }
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60
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518
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61 #if (NGX_HAVE_FILE_AIO)
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62
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63 #define SYS_io_setup 245
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64 #define SYS_io_destroy 246
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65 #define SYS_io_getevents 247
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66 #define SYS_eventfd 323
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67
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68 typedef u_int aio_context_t;
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69
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70 struct io_event {
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71 uint64_t data; /* the data field from the iocb */
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72 uint64_t obj; /* what iocb this event came from */
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73 int64_t res; /* result code for this event */
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74 int64_t res2; /* secondary result */
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75 };
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76
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77
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78 int eventfd(u_int initval)
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79 {
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80 return -1;
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81 }
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82
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83 #endif
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0
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84 #endif
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85
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86
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87 typedef struct {
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324
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88 ngx_uint_t events;
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640
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89 ngx_uint_t aio_requests;
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0
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90 } ngx_epoll_conf_t;
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91
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92
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112
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93 static ngx_int_t ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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0
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94 static void ngx_epoll_done(ngx_cycle_t *cycle);
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324
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95 static ngx_int_t ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event,
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96 ngx_uint_t flags);
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97 static ngx_int_t ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event,
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98 ngx_uint_t flags);
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48
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99 static ngx_int_t ngx_epoll_add_connection(ngx_connection_t *c);
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324
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100 static ngx_int_t ngx_epoll_del_connection(ngx_connection_t *c,
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101 ngx_uint_t flags);
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112
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102 static ngx_int_t ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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103 ngx_uint_t flags);
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0
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104
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518
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105 #if (NGX_HAVE_FILE_AIO)
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106 static void ngx_epoll_eventfd_handler(ngx_event_t *ev);
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107 #endif
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108
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0
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109 static void *ngx_epoll_create_conf(ngx_cycle_t *cycle);
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110 static char *ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf);
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111
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112 static int ep = -1;
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113 static struct epoll_event *event_list;
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324
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114 static ngx_uint_t nevents;
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0
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115
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518
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116 #if (NGX_HAVE_FILE_AIO)
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117
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118 int ngx_eventfd = -1;
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119 aio_context_t ngx_aio_ctx = 0;
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120
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121 static ngx_event_t ngx_eventfd_event;
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122 static ngx_connection_t ngx_eventfd_conn;
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123
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124 #endif
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0
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125
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126 static ngx_str_t epoll_name = ngx_string("epoll");
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127
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128 static ngx_command_t ngx_epoll_commands[] = {
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129
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48
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130 { ngx_string("epoll_events"),
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131 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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132 ngx_conf_set_num_slot,
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133 0,
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134 offsetof(ngx_epoll_conf_t, events),
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135 NULL },
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0
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136
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640
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137 { ngx_string("worker_aio_requests"),
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138 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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139 ngx_conf_set_num_slot,
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140 0,
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141 offsetof(ngx_epoll_conf_t, aio_requests),
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142 NULL },
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143
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48
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144 ngx_null_command
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0
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145 };
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146
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147
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148 ngx_event_module_t ngx_epoll_module_ctx = {
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149 &epoll_name,
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150 ngx_epoll_create_conf, /* create configuration */
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151 ngx_epoll_init_conf, /* init configuration */
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152
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153 {
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154 ngx_epoll_add_event, /* add an event */
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155 ngx_epoll_del_event, /* delete an event */
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156 ngx_epoll_add_event, /* enable an event */
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157 ngx_epoll_del_event, /* disable an event */
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158 ngx_epoll_add_connection, /* add an connection */
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159 ngx_epoll_del_connection, /* delete an connection */
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160 NULL, /* process the changes */
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161 ngx_epoll_process_events, /* process the events */
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162 ngx_epoll_init, /* init the events */
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163 ngx_epoll_done, /* done the events */
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164 }
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165 };
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166
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167 ngx_module_t ngx_epoll_module = {
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58
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168 NGX_MODULE_V1,
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0
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169 &ngx_epoll_module_ctx, /* module context */
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170 ngx_epoll_commands, /* module directives */
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171 NGX_EVENT_MODULE, /* module type */
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90
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172 NULL, /* init master */
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0
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173 NULL, /* init module */
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90
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174 NULL, /* init process */
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175 NULL, /* init thread */
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176 NULL, /* exit thread */
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177 NULL, /* exit process */
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178 NULL, /* exit master */
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179 NGX_MODULE_V1_PADDING
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0
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180 };
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181
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182
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518
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183 #if (NGX_HAVE_FILE_AIO)
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184
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185 /*
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186 * We call io_setup(), io_destroy() io_submit(), and io_getevents() directly
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187 * as syscalls instead of libaio usage, because the library header file
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188 * supports eventfd() since 0.3.107 version only.
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189 *
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190 * Also we do not use eventfd() in glibc, because glibc supports it
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191 * since 2.8 version and glibc maps two syscalls eventfd() and eventfd2()
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192 * into single eventfd() function with different number of parameters.
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193 */
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194
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640
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195 static int
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518
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196 io_setup(u_int nr_reqs, aio_context_t *ctx)
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197 {
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198 return syscall(SYS_io_setup, nr_reqs, ctx);
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199 }
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200
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201
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202 static int
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203 io_destroy(aio_context_t ctx)
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204 {
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205 return syscall(SYS_io_destroy, ctx);
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206 }
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207
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208
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640
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209 static int
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518
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210 io_getevents(aio_context_t ctx, long min_nr, long nr, struct io_event *events,
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211 struct timespec *tmo)
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212 {
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213 return syscall(SYS_io_getevents, ctx, min_nr, nr, events, tmo);
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214 }
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215
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640
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216
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217 static void
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218 ngx_epoll_aio_init(ngx_cycle_t *cycle, ngx_epoll_conf_t *epcf)
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219 {
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220 int n;
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221 struct epoll_event ee;
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222
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223 ngx_eventfd = syscall(SYS_eventfd, 0);
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224
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225 if (ngx_eventfd == -1) {
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226 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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227 "eventfd() failed");
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228 ngx_file_aio = 0;
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229 return;
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230 }
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231
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232 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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233 "eventfd: %d", ngx_eventfd);
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234
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235 n = 1;
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236
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237 if (ioctl(ngx_eventfd, FIONBIO, &n) == -1) {
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238 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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239 "ioctl(eventfd, FIONBIO) failed");
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240 goto failed;
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241 }
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242
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243 if (io_setup(epcf->aio_requests, &ngx_aio_ctx) == -1) {
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244 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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245 "io_setup() failed");
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246 goto failed;
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247 }
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248
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249 ngx_eventfd_event.data = &ngx_eventfd_conn;
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250 ngx_eventfd_event.handler = ngx_epoll_eventfd_handler;
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251 ngx_eventfd_event.log = cycle->log;
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252 ngx_eventfd_event.active = 1;
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253 ngx_eventfd_conn.fd = ngx_eventfd;
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254 ngx_eventfd_conn.read = &ngx_eventfd_event;
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255 ngx_eventfd_conn.log = cycle->log;
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256
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257 ee.events = EPOLLIN|EPOLLET;
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258 ee.data.ptr = &ngx_eventfd_conn;
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259
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260 if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_eventfd, &ee) != -1) {
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261 return;
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262 }
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263
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264 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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265 "epoll_ctl(EPOLL_CTL_ADD, eventfd) failed");
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266
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267 if (io_destroy(ngx_aio_ctx) == -1) {
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268 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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269 "io_destroy() failed");
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270 }
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271
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272 failed:
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273
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274 if (close(ngx_eventfd) == -1) {
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275 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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276 "eventfd close() failed");
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277 }
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278
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279 ngx_eventfd = -1;
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280 ngx_aio_ctx = 0;
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281 ngx_file_aio = 0;
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282 }
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283
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518
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284 #endif
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285
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286
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48
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287 static ngx_int_t
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112
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288 ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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0
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289 {
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290 ngx_epoll_conf_t *epcf;
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291
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292 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_epoll_module);
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293
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294 if (ep == -1) {
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384
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295 ep = epoll_create(cycle->connection_n / 2);
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0
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296
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297 if (ep == -1) {
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298 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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299 "epoll_create() failed");
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300 return NGX_ERROR;
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301 }
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518
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302
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303 #if (NGX_HAVE_FILE_AIO)
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304
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640
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305 ngx_epoll_aio_init(cycle, epcf);
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518
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306
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307 #endif
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0
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308 }
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309
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310 if (nevents < epcf->events) {
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311 if (event_list) {
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312 ngx_free(event_list);
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313 }
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314
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315 event_list = ngx_alloc(sizeof(struct epoll_event) * epcf->events,
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316 cycle->log);
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317 if (event_list == NULL) {
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318 return NGX_ERROR;
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319 }
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320 }
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321
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322 nevents = epcf->events;
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323
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324 ngx_io = ngx_os_io;
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325
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326 ngx_event_actions = ngx_epoll_module_ctx.actions;
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327
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18
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328 #if (NGX_HAVE_CLEAR_EVENT)
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0
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329 ngx_event_flags = NGX_USE_CLEAR_EVENT
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330 #else
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331 ngx_event_flags = NGX_USE_LEVEL_EVENT
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332 #endif
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4
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333 |NGX_USE_GREEDY_EVENT
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0
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334 |NGX_USE_EPOLL_EVENT;
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335
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336 return NGX_OK;
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337 }
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338
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339
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48
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340 static void
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341 ngx_epoll_done(ngx_cycle_t *cycle)
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0
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342 {
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343 if (close(ep) == -1) {
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344 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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345 "epoll close() failed");
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346 }
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347
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348 ep = -1;
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349
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518
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350 #if (NGX_HAVE_FILE_AIO)
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351
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640
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352 if (ngx_eventfd != -1) {
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353
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354 if (io_destroy(ngx_aio_ctx) == -1) {
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355 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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356 "io_destroy() failed");
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357 }
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358
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359 if (close(ngx_eventfd) == -1) {
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360 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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361 "eventfd close() failed");
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362 }
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363
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364 ngx_eventfd = -1;
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518
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365 }
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366
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367 ngx_aio_ctx = 0;
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368
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369 #endif
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370
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0
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371 ngx_free(event_list);
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372
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373 event_list = NULL;
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374 nevents = 0;
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375 }
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376
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377
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48
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378 static ngx_int_t
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324
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379 ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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0
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380 {
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32
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381 int op;
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382 uint32_t events, prev;
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0
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383 ngx_event_t *e;
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384 ngx_connection_t *c;
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385 struct epoll_event ee;
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386
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387 c = ev->data;
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388
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32
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389 events = (uint32_t) event;
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390
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0
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391 if (event == NGX_READ_EVENT) {
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392 e = c->write;
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393 prev = EPOLLOUT;
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394 #if (NGX_READ_EVENT != EPOLLIN)
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32
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395 events = EPOLLIN;
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0
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396 #endif
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397
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398 } else {
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399 e = c->read;
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400 prev = EPOLLIN;
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401 #if (NGX_WRITE_EVENT != EPOLLOUT)
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32
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402 events = EPOLLOUT;
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0
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403 #endif
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404 }
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405
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406 if (e->active) {
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407 op = EPOLL_CTL_MOD;
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32
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408 events |= prev;
|
0
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409
|
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410 } else {
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411 op = EPOLL_CTL_ADD;
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412 }
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413
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324
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414 ee.events = events | (uint32_t) flags;
|
130
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415 ee.data.ptr = (void *) ((uintptr_t) c | ev->instance);
|
0
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416
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417 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
10
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418 "epoll add event: fd:%d op:%d ev:%08XD",
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0
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419 c->fd, op, ee.events);
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420
|
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421 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
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422 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
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423 "epoll_ctl(%d, %d) failed", op, c->fd);
|
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424 return NGX_ERROR;
|
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425 }
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426
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427 ev->active = 1;
|
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428 #if 0
|
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429 ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0;
|
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430 #endif
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431
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432 return NGX_OK;
|
|
433 }
|
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434
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435
|
48
|
436 static ngx_int_t
|
324
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437 ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
|
0
|
438 {
|
32
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439 int op;
|
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440 uint32_t prev;
|
0
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441 ngx_event_t *e;
|
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442 ngx_connection_t *c;
|
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443 struct epoll_event ee;
|
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444
|
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445 /*
|
32
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446 * when the file descriptor is closed, the epoll automatically deletes
|
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447 * it from its queue, so we do not need to delete explicity the event
|
0
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448 * before the closing the file descriptor
|
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449 */
|
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450
|
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451 if (flags & NGX_CLOSE_EVENT) {
|
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452 ev->active = 0;
|
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453 return NGX_OK;
|
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454 }
|
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455
|
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456 c = ev->data;
|
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457
|
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458 if (event == NGX_READ_EVENT) {
|
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459 e = c->write;
|
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460 prev = EPOLLOUT;
|
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461
|
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462 } else {
|
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463 e = c->read;
|
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464 prev = EPOLLIN;
|
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465 }
|
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466
|
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467 if (e->active) {
|
|
468 op = EPOLL_CTL_MOD;
|
324
|
469 ee.events = prev | (uint32_t) flags;
|
130
|
470 ee.data.ptr = (void *) ((uintptr_t) c | ev->instance);
|
0
|
471
|
|
472 } else {
|
|
473 op = EPOLL_CTL_DEL;
|
|
474 ee.events = 0;
|
|
475 ee.data.ptr = NULL;
|
|
476 }
|
|
477
|
|
478 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
10
|
479 "epoll del event: fd:%d op:%d ev:%08XD",
|
0
|
480 c->fd, op, ee.events);
|
|
481
|
|
482 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
483 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
484 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
485 return NGX_ERROR;
|
|
486 }
|
|
487
|
|
488 ev->active = 0;
|
|
489
|
|
490 return NGX_OK;
|
|
491 }
|
|
492
|
|
493
|
48
|
494 static ngx_int_t
|
|
495 ngx_epoll_add_connection(ngx_connection_t *c)
|
0
|
496 {
|
|
497 struct epoll_event ee;
|
|
498
|
|
499 ee.events = EPOLLIN|EPOLLOUT|EPOLLET;
|
130
|
500 ee.data.ptr = (void *) ((uintptr_t) c | c->read->instance);
|
0
|
501
|
|
502 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
10
|
503 "epoll add connection: fd:%d ev:%08XD", c->fd, ee.events);
|
0
|
504
|
|
505 if (epoll_ctl(ep, EPOLL_CTL_ADD, c->fd, &ee) == -1) {
|
|
506 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
507 "epoll_ctl(EPOLL_CTL_ADD, %d) failed", c->fd);
|
|
508 return NGX_ERROR;
|
|
509 }
|
|
510
|
|
511 c->read->active = 1;
|
|
512 c->write->active = 1;
|
|
513
|
|
514 return NGX_OK;
|
|
515 }
|
|
516
|
|
517
|
48
|
518 static ngx_int_t
|
324
|
519 ngx_epoll_del_connection(ngx_connection_t *c, ngx_uint_t flags)
|
0
|
520 {
|
324
|
521 int op;
|
|
522 struct epoll_event ee;
|
0
|
523
|
|
524 /*
|
|
525 * when the file descriptor is closed the epoll automatically deletes
|
|
526 * it from its queue so we do not need to delete explicity the event
|
|
527 * before the closing the file descriptor
|
|
528 */
|
|
529
|
|
530 if (flags & NGX_CLOSE_EVENT) {
|
|
531 c->read->active = 0;
|
|
532 c->write->active = 0;
|
|
533 return NGX_OK;
|
|
534 }
|
|
535
|
|
536 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
537 "epoll del connection: fd:%d", c->fd);
|
|
538
|
|
539 op = EPOLL_CTL_DEL;
|
|
540 ee.events = 0;
|
130
|
541 ee.data.ptr = NULL;
|
0
|
542
|
|
543 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
544 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
545 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
546 return NGX_ERROR;
|
|
547 }
|
|
548
|
|
549 c->read->active = 0;
|
|
550 c->write->active = 0;
|
|
551
|
|
552 return NGX_OK;
|
|
553 }
|
|
554
|
|
555
|
48
|
556 static ngx_int_t
|
112
|
557 ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags)
|
0
|
558 {
|
|
559 int events;
|
32
|
560 uint32_t revents;
|
0
|
561 ngx_int_t instance, i;
|
112
|
562 ngx_uint_t level;
|
0
|
563 ngx_err_t err;
|
112
|
564 ngx_event_t *rev, *wev, **queue;
|
0
|
565 ngx_connection_t *c;
|
|
566
|
|
567 /* NGX_TIMER_INFINITE == INFTIM */
|
|
568
|
|
569 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
106
|
570 "epoll timer: %M", timer);
|
0
|
571
|
324
|
572 events = epoll_wait(ep, event_list, (int) nevents, timer);
|
0
|
573
|
518
|
574 err = (events == -1) ? ngx_errno : 0;
|
0
|
575
|
566
|
576 if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
|
|
577 ngx_time_update();
|
112
|
578 }
|
0
|
579
|
|
580 if (err) {
|
112
|
581 if (err == NGX_EINTR) {
|
|
582
|
|
583 if (ngx_event_timer_alarm) {
|
|
584 ngx_event_timer_alarm = 0;
|
|
585 return NGX_OK;
|
|
586 }
|
126
|
587
|
112
|
588 level = NGX_LOG_INFO;
|
126
|
589
|
|
590 } else {
|
112
|
591 level = NGX_LOG_ALERT;
|
|
592 }
|
|
593
|
|
594 ngx_log_error(level, cycle->log, err, "epoll_wait() failed");
|
0
|
595 return NGX_ERROR;
|
|
596 }
|
|
597
|
112
|
598 if (events == 0) {
|
116
|
599 if (timer != NGX_TIMER_INFINITE) {
|
|
600 return NGX_OK;
|
|
601 }
|
|
602
|
|
603 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
604 "epoll_wait() returned no events without timeout");
|
|
605 return NGX_ERROR;
|
112
|
606 }
|
0
|
607
|
112
|
608 ngx_mutex_lock(ngx_posted_events_mutex);
|
0
|
609
|
|
610 for (i = 0; i < events; i++) {
|
|
611 c = event_list[i].data.ptr;
|
|
612
|
|
613 instance = (uintptr_t) c & 1;
|
|
614 c = (ngx_connection_t *) ((uintptr_t) c & (uintptr_t) ~1);
|
|
615
|
|
616 rev = c->read;
|
|
617
|
|
618 if (c->fd == -1 || rev->instance != instance) {
|
|
619
|
|
620 /*
|
|
621 * the stale event from a file descriptor
|
|
622 * that was just closed in this iteration
|
|
623 */
|
|
624
|
|
625 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
626 "epoll: stale event %p", c);
|
0
|
627 continue;
|
|
628 }
|
|
629
|
32
|
630 revents = event_list[i].events;
|
|
631
|
622
|
632 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
633 "epoll: fd:%d ev:%04XD d:%p",
|
126
|
634 c->fd, revents, event_list[i].data.ptr);
|
0
|
635
|
32
|
636 if (revents & (EPOLLERR|EPOLLHUP)) {
|
622
|
637 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
638 "epoll_wait() error on fd:%d ev:%04XD",
|
32
|
639 c->fd, revents);
|
|
640 }
|
|
641
|
212
|
642 #if 0
|
32
|
643 if (revents & ~(EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP)) {
|
622
|
644 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
32
|
645 "strange epoll_wait() events fd:%d ev:%04XD",
|
|
646 c->fd, revents);
|
0
|
647 }
|
212
|
648 #endif
|
0
|
649
|
32
|
650 if ((revents & (EPOLLERR|EPOLLHUP))
|
|
651 && (revents & (EPOLLIN|EPOLLOUT)) == 0)
|
|
652 {
|
|
653 /*
|
|
654 * if the error events were returned without EPOLLIN or EPOLLOUT,
|
|
655 * then add these flags to handle the events at least in one
|
|
656 * active handler
|
|
657 */
|
|
658
|
|
659 revents |= EPOLLIN|EPOLLOUT;
|
0
|
660 }
|
|
661
|
112
|
662 if ((revents & EPOLLIN) && rev->active) {
|
|
663
|
|
664 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
665 rev->posted_ready = 1;
|
|
666
|
|
667 } else {
|
|
668 rev->ready = 1;
|
|
669 }
|
|
670
|
|
671 if (flags & NGX_POST_EVENTS) {
|
|
672 queue = (ngx_event_t **) (rev->accept ?
|
|
673 &ngx_posted_accept_events : &ngx_posted_events);
|
|
674
|
|
675 ngx_locked_post_event(rev, queue);
|
|
676
|
|
677 } else {
|
|
678 rev->handler(rev);
|
|
679 }
|
|
680 }
|
|
681
|
0
|
682 wev = c->write;
|
|
683
|
650
|
684 if (c->fd == -1 || wev->instance != instance) {
|
|
685
|
|
686 /*
|
|
687 * the stale event from a file descriptor
|
|
688 * that was just closed in this iteration
|
|
689 */
|
|
690
|
|
691 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
692 "epoll: stale event %p", c);
|
|
693 continue;
|
|
694 }
|
|
695
|
32
|
696 if ((revents & EPOLLOUT) && wev->active) {
|
|
697
|
112
|
698 if (flags & NGX_POST_THREAD_EVENTS) {
|
0
|
699 wev->posted_ready = 1;
|
|
700
|
|
701 } else {
|
|
702 wev->ready = 1;
|
|
703 }
|
|
704
|
112
|
705 if (flags & NGX_POST_EVENTS) {
|
|
706 ngx_locked_post_event(wev, &ngx_posted_events);
|
0
|
707
|
112
|
708 } else {
|
|
709 wev->handler(wev);
|
0
|
710 }
|
|
711 }
|
|
712 }
|
|
713
|
112
|
714 ngx_mutex_unlock(ngx_posted_events_mutex);
|
0
|
715
|
|
716 return NGX_OK;
|
|
717 }
|
|
718
|
|
719
|
518
|
720 #if (NGX_HAVE_FILE_AIO)
|
|
721
|
|
722 static void
|
|
723 ngx_epoll_eventfd_handler(ngx_event_t *ev)
|
|
724 {
|
640
|
725 int n, events;
|
|
726 long i;
|
518
|
727 uint64_t ready;
|
|
728 ngx_err_t err;
|
|
729 ngx_event_t *e;
|
|
730 ngx_event_aio_t *aio;
|
|
731 struct io_event event[64];
|
|
732 struct timespec ts;
|
|
733
|
|
734 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd handler");
|
|
735
|
|
736 n = read(ngx_eventfd, &ready, 8);
|
|
737
|
|
738 err = ngx_errno;
|
|
739
|
|
740 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd: %d", n);
|
|
741
|
|
742 if (n != 8) {
|
|
743 if (n == -1) {
|
|
744 if (err == NGX_EAGAIN) {
|
|
745 return;
|
|
746 }
|
|
747
|
|
748 ngx_log_error(NGX_LOG_ALERT, ev->log, err, "read(eventfd) failed");
|
|
749 return;
|
|
750 }
|
|
751
|
|
752 ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
|
|
753 "read(eventfd) returned only %d bytes", n);
|
|
754 return;
|
|
755 }
|
|
756
|
|
757 ts.tv_sec = 0;
|
|
758 ts.tv_nsec = 0;
|
|
759
|
|
760 while (ready) {
|
|
761
|
|
762 events = io_getevents(ngx_aio_ctx, 1, 64, event, &ts);
|
|
763
|
|
764 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
765 "io_getevents: %l", events);
|
|
766
|
|
767 if (events > 0) {
|
|
768 ready -= events;
|
|
769
|
|
770 for (i = 0; i < events; i++) {
|
|
771
|
|
772 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
773 "io_event: %uXL %uXL %L %L",
|
|
774 event[i].data, event[i].obj,
|
|
775 event[i].res, event[i].res2);
|
|
776
|
|
777 e = (ngx_event_t *) (uintptr_t) event[i].data;
|
|
778
|
|
779 e->complete = 1;
|
|
780 e->active = 0;
|
|
781 e->ready = 1;
|
|
782
|
|
783 aio = e->data;
|
|
784 aio->res = event[i].res;
|
|
785
|
|
786 ngx_post_event(e, &ngx_posted_events);
|
|
787 }
|
|
788
|
|
789 continue;
|
|
790 }
|
|
791
|
|
792 if (events == 0) {
|
|
793 return;
|
|
794 }
|
|
795
|
640
|
796 /* events == -1 */
|
|
797 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
798 "io_getevents() failed");
|
518
|
799 return;
|
|
800 }
|
|
801 }
|
|
802
|
|
803 #endif
|
|
804
|
|
805
|
48
|
806 static void *
|
|
807 ngx_epoll_create_conf(ngx_cycle_t *cycle)
|
0
|
808 {
|
|
809 ngx_epoll_conf_t *epcf;
|
|
810
|
50
|
811 epcf = ngx_palloc(cycle->pool, sizeof(ngx_epoll_conf_t));
|
|
812 if (epcf == NULL) {
|
496
|
813 return NULL;
|
50
|
814 }
|
0
|
815
|
|
816 epcf->events = NGX_CONF_UNSET;
|
640
|
817 epcf->aio_requests = NGX_CONF_UNSET;
|
0
|
818
|
|
819 return epcf;
|
|
820 }
|
|
821
|
|
822
|
48
|
823 static char *
|
|
824 ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
0
|
825 {
|
|
826 ngx_epoll_conf_t *epcf = conf;
|
|
827
|
212
|
828 ngx_conf_init_uint_value(epcf->events, 512);
|
640
|
829 ngx_conf_init_uint_value(epcf->aio_requests, 32);
|
0
|
830
|
|
831 return NGX_CONF_OK;
|
|
832 }
|