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_DEVPOLL)
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0
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13
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14 /* Solaris declarations */
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15
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332
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16 #define POLLREMOVE 0x0800
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17 #define DP_POLL 0xD001
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18 #define DP_ISPOLLED 0xD002
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0
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19
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20 struct dvpoll {
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21 struct pollfd *dp_fds;
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22 int dp_nfds;
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23 int dp_timeout;
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24 };
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25
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26 #endif
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27
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28
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29 typedef struct {
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324
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30 ngx_uint_t changes;
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31 ngx_uint_t events;
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0
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32 } ngx_devpoll_conf_t;
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33
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34
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112
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35 static ngx_int_t ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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0
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36 static void ngx_devpoll_done(ngx_cycle_t *cycle);
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324
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37 static ngx_int_t ngx_devpoll_add_event(ngx_event_t *ev, ngx_int_t event,
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38 ngx_uint_t flags);
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39 static ngx_int_t ngx_devpoll_del_event(ngx_event_t *ev, ngx_int_t event,
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40 ngx_uint_t flags);
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41 static ngx_int_t ngx_devpoll_set_event(ngx_event_t *ev, ngx_int_t event,
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42 ngx_uint_t flags);
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112
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43 static ngx_int_t ngx_devpoll_process_events(ngx_cycle_t *cycle,
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44 ngx_msec_t timer, ngx_uint_t flags);
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0
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45
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46 static void *ngx_devpoll_create_conf(ngx_cycle_t *cycle);
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47 static char *ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf);
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48
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49 static int dp = -1;
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50 static struct pollfd *change_list, *event_list;
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324
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51 static ngx_uint_t nchanges, max_changes, nevents;
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0
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52
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53 static ngx_event_t **change_index;
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54
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55
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56 static ngx_str_t devpoll_name = ngx_string("/dev/poll");
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57
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58 static ngx_command_t ngx_devpoll_commands[] = {
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59
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48
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60 { ngx_string("devpoll_changes"),
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61 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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62 ngx_conf_set_num_slot,
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63 0,
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64 offsetof(ngx_devpoll_conf_t, changes),
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65 NULL },
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0
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66
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48
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67 { ngx_string("devpoll_events"),
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68 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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69 ngx_conf_set_num_slot,
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70 0,
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71 offsetof(ngx_devpoll_conf_t, events),
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72 NULL },
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0
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73
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48
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74 ngx_null_command
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0
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75 };
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76
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77
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78 ngx_event_module_t ngx_devpoll_module_ctx = {
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79 &devpoll_name,
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80 ngx_devpoll_create_conf, /* create configuration */
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81 ngx_devpoll_init_conf, /* init configuration */
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82
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83 {
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84 ngx_devpoll_add_event, /* add an event */
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85 ngx_devpoll_del_event, /* delete an event */
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86 ngx_devpoll_add_event, /* enable an event */
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87 ngx_devpoll_del_event, /* disable an event */
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88 NULL, /* add an connection */
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89 NULL, /* delete an connection */
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90 NULL, /* process the changes */
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91 ngx_devpoll_process_events, /* process the events */
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92 ngx_devpoll_init, /* init the events */
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93 ngx_devpoll_done, /* done the events */
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94 }
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95
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96 };
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97
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98 ngx_module_t ngx_devpoll_module = {
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58
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99 NGX_MODULE_V1,
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0
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100 &ngx_devpoll_module_ctx, /* module context */
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101 ngx_devpoll_commands, /* module directives */
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102 NGX_EVENT_MODULE, /* module type */
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90
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103 NULL, /* init master */
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0
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104 NULL, /* init module */
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90
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105 NULL, /* init process */
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106 NULL, /* init thread */
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107 NULL, /* exit thread */
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108 NULL, /* exit process */
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109 NULL, /* exit master */
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110 NGX_MODULE_V1_PADDING
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0
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111 };
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112
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113
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48
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114 static ngx_int_t
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112
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115 ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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0
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116 {
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117 size_t n;
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118 ngx_devpoll_conf_t *dpcf;
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119
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120 dpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_devpoll_module);
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121
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122 if (dp == -1) {
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123 dp = open("/dev/poll", O_RDWR);
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124
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125 if (dp == -1) {
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126 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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127 "open(/dev/poll) failed");
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128 return NGX_ERROR;
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129 }
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130 }
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131
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132 if (max_changes < dpcf->changes) {
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133 if (nchanges) {
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134 n = nchanges * sizeof(struct pollfd);
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135 if (write(dp, change_list, n) != (ssize_t) n) {
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136 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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137 "write(/dev/poll) failed");
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138 return NGX_ERROR;
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139 }
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140
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141 nchanges = 0;
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142 }
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143
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144 if (change_list) {
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145 ngx_free(change_list);
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146 }
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147
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50
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148 change_list = ngx_alloc(sizeof(struct pollfd) * dpcf->changes,
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149 cycle->log);
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150 if (change_list == NULL) {
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151 return NGX_ERROR;
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152 }
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0
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153
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154 if (change_index) {
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155 ngx_free(change_index);
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156 }
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157
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50
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158 change_index = ngx_alloc(sizeof(ngx_event_t *) * dpcf->changes,
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159 cycle->log);
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160 if (change_index == NULL) {
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161 return NGX_ERROR;
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162 }
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0
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163 }
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164
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165 max_changes = dpcf->changes;
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166
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167 if (nevents < dpcf->events) {
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168 if (event_list) {
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169 ngx_free(event_list);
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170 }
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171
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50
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172 event_list = ngx_alloc(sizeof(struct pollfd) * dpcf->events,
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173 cycle->log);
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174 if (event_list == NULL) {
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175 return NGX_ERROR;
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176 }
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0
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177 }
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178
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179 nevents = dpcf->events;
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180
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181 ngx_io = ngx_os_io;
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182
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183 ngx_event_actions = ngx_devpoll_module_ctx.actions;
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184
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92
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185 ngx_event_flags = NGX_USE_LEVEL_EVENT|NGX_USE_FD_EVENT;
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0
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186
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187 return NGX_OK;
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188 }
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189
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190
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48
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191 static void
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192 ngx_devpoll_done(ngx_cycle_t *cycle)
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0
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193 {
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194 if (close(dp) == -1) {
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195 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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196 "close(/dev/poll) failed");
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197 }
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198
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199 dp = -1;
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200
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201 ngx_free(change_list);
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202 ngx_free(event_list);
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203 ngx_free(change_index);
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204
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205 change_list = NULL;
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206 event_list = NULL;
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207 change_index = NULL;
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208 max_changes = 0;
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209 nchanges = 0;
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210 nevents = 0;
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211 }
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212
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213
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48
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214 static ngx_int_t
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324
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215 ngx_devpoll_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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0
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216 {
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217 #if (NGX_DEBUG)
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218 ngx_connection_t *c;
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219 #endif
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220
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221 #if (NGX_READ_EVENT != POLLIN)
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2
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222 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
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0
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223 #endif
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224
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225 #if (NGX_DEBUG)
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226 c = ev->data;
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227 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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228 "devpoll add event: fd:%d ev:%04Xi", c->fd, event);
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0
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229 #endif
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230
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231 ev->active = 1;
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2
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232
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0
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233 return ngx_devpoll_set_event(ev, event, 0);
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234 }
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235
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236
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48
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237 static ngx_int_t
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324
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238 ngx_devpoll_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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0
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239 {
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240 ngx_event_t *e;
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241 ngx_connection_t *c;
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242
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243 c = ev->data;
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244
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2
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245 #if (NGX_READ_EVENT != POLLIN)
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246 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
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247 #endif
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248
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0
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249 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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250 "devpoll del event: fd:%d ev:%04Xi", c->fd, event);
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0
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251
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252 if (ngx_devpoll_set_event(ev, POLLREMOVE, flags) == NGX_ERROR) {
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253 return NGX_ERROR;
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254 }
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255
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256 ev->active = 0;
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257
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258 if (flags & NGX_CLOSE_EVENT) {
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332
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259 e = (event == POLLIN) ? c->write : c->read;
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260
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261 if (e) {
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262 e->active = 0;
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263 }
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264
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0
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265 return NGX_OK;
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266 }
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267
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332
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268 /* restore the pair event if it exists */
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0
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269
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2
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270 if (event == POLLIN) {
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0
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271 e = c->write;
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272 event = POLLOUT;
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273
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274 } else {
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275 e = c->read;
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276 event = POLLIN;
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277 }
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278
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2
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279 if (e && e->active) {
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0
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280 return ngx_devpoll_set_event(e, event, 0);
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281 }
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282
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283 return NGX_OK;
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284 }
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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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324
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288 ngx_devpoll_set_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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0
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289 {
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290 size_t n;
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291 ngx_connection_t *c;
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292
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293 c = ev->data;
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294
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295 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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296 "devpoll fd:%d ev:%04Xi fl:%04Xi", c->fd, event, flags);
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0
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297
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298 if (nchanges >= max_changes) {
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299 ngx_log_error(NGX_LOG_WARN, ev->log, 0,
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300 "/dev/pool change list is filled up");
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301
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302 n = nchanges * sizeof(struct pollfd);
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303 if (write(dp, change_list, n) != (ssize_t) n) {
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304 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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305 "write(/dev/poll) failed");
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306 return NGX_ERROR;
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307 }
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308
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309 nchanges = 0;
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310 }
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311
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312 change_list[nchanges].fd = c->fd;
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324
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313 change_list[nchanges].events = (short) event;
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0
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314 change_list[nchanges].revents = 0;
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315
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316 change_index[nchanges] = ev;
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317 ev->index = nchanges;
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318
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319 nchanges++;
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320
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321 if (flags & NGX_CLOSE_EVENT) {
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322 n = nchanges * sizeof(struct pollfd);
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323 if (write(dp, change_list, n) != (ssize_t) n) {
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324 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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325 "write(/dev/poll) failed");
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326 return NGX_ERROR;
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327 }
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328
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329 nchanges = 0;
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330 }
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331
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332 return NGX_OK;
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333 }
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334
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335
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48
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336 ngx_int_t
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112
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337 ngx_devpoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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338 ngx_uint_t flags)
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0
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339 {
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332
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340 int events, revents, rc;
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106
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341 size_t n;
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332
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342 ngx_fd_t fd;
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106
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343 ngx_err_t err;
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0
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344 ngx_int_t i;
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112
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345 ngx_uint_t level;
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346 ngx_event_t *rev, *wev, **queue;
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0
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347 ngx_connection_t *c;
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332
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348 struct pollfd pfd;
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0
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349 struct dvpoll dvp;
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350
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351 /* NGX_TIMER_INFINITE == INFTIM */
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352
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353 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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106
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354 "devpoll timer: %M", timer);
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0
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355
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356 if (nchanges) {
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357 n = nchanges * sizeof(struct pollfd);
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358 if (write(dp, change_list, n) != (ssize_t) n) {
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359 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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360 "write(/dev/poll) failed");
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361 return NGX_ERROR;
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362 }
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116
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363
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364 nchanges = 0;
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0
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365 }
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366
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367 dvp.dp_fds = event_list;
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324
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368 dvp.dp_nfds = (int) nevents;
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0
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369 dvp.dp_timeout = timer;
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370 events = ioctl(dp, DP_POLL, &dvp);
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371
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372 if (events == -1) {
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373 err = ngx_errno;
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374 } else {
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375 err = 0;
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376 }
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377
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112
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378 if (flags & NGX_UPDATE_TIME) {
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379 ngx_time_update(0, 0);
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380 }
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0
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381
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382 if (err) {
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112
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383 if (err == NGX_EINTR) {
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384
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385 if (ngx_event_timer_alarm) {
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386 ngx_event_timer_alarm = 0;
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387 return NGX_OK;
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388 }
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126
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389
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112
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390 level = NGX_LOG_INFO;
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126
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391
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392 } else {
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112
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393 level = NGX_LOG_ALERT;
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394 }
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395
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396 ngx_log_error(level, cycle->log, err, "ioctl(DP_POLL) failed");
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0
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397 return NGX_ERROR;
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398 }
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399
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116
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400 if (events == 0) {
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401 if (timer != NGX_TIMER_INFINITE) {
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402 return NGX_OK;
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403 }
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0
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404
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116
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405 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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406 "ioctl(DP_POLL) returned no events without timeout");
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407 return NGX_ERROR;
|
0
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408 }
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409
|
112
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410 ngx_mutex_lock(ngx_posted_events_mutex);
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0
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411
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412 for (i = 0; i < events; i++) {
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332
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413
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414 fd = event_list[i].fd;
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415 revents = event_list[i].revents;
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416
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417 c = ngx_cycle->files[fd];
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418
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419 if (c == NULL || c->fd == -1) {
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420
|
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421 pfd.fd = fd;
|
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422 pfd.events = 0;
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423 pfd.revents = 0;
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424
|
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425 rc = ioctl(dp, DP_ISPOLLED, &pfd);
|
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426
|
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427 switch (rc) {
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428
|
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429 case -1:
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430 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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431 "ioctl(DP_ISPOLLED) failed for socket %d, event",
|
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432 fd, revents);
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433 break;
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0
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434
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332
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435 case 0:
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436 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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437 "phantom event %04Xd for closed and removed socket %d",
|
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438 revents, fd);
|
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439 break;
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440
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441 default:
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442 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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443 "unexpected event %04Xd for closed and removed socket %d, ",
|
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444 "ioctl(DP_ISPOLLED) returned rc:%d, fd:%d, event %04Xd",
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445 revents, fd, rc, pfd.fd, pfd.revents);
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446
|
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447 pfd.fd = fd;
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448 pfd.events = POLLREMOVE;
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449 pfd.revents = 0;
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450
|
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451 if (write(dp, &pfd, sizeof(struct pollfd))
|
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452 != (ssize_t) sizeof(struct pollfd))
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453 {
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454 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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455 "write(/dev/poll) for %d failed, fd");
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456 }
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457
|
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458 if (close(fd) == -1) {
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459 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
460 "close(%d) failed", fd);
|
|
461 }
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462
|
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463 break;
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22
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464 }
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465
|
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466 continue;
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|
467 }
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468
|
0
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469 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
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470 "devpoll: fd:%d, ev:%04Xd, rev:%04Xd",
|
332
|
471 fd, event_list[i].events, revents);
|
0
|
472
|
32
|
473 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
|
292
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474 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
475 "ioctl(DP_POLL) error fd:%d ev:%04Xd rev:%04Xd",
|
332
|
476 fd, event_list[i].events, revents);
|
0
|
477 }
|
|
478
|
32
|
479 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
|
0
|
480 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
481 "strange ioctl(DP_POLL) events "
|
10
|
482 "fd:%d ev:%04Xd rev:%04Xd",
|
332
|
483 fd, event_list[i].events, revents);
|
32
|
484 }
|
|
485
|
|
486 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
|
|
487 && (revents & (POLLIN|POLLOUT)) == 0)
|
|
488 {
|
|
489 /*
|
|
490 * if the error events were returned without POLLIN or POLLOUT,
|
|
491 * then add these flags to handle the events at least in one
|
126
|
492 * active handler
|
32
|
493 */
|
|
494
|
|
495 revents |= POLLIN|POLLOUT;
|
0
|
496 }
|
|
497
|
|
498 rev = c->read;
|
|
499
|
32
|
500 if ((revents & POLLIN) && rev->active) {
|
0
|
501
|
112
|
502 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
503 rev->posted_ready = 1;
|
0
|
504
|
112
|
505 } else {
|
|
506 rev->ready = 1;
|
|
507 }
|
0
|
508
|
112
|
509 if (flags & NGX_POST_EVENTS) {
|
|
510 queue = (ngx_event_t **) (rev->accept ?
|
|
511 &ngx_posted_accept_events : &ngx_posted_events);
|
0
|
512
|
112
|
513 ngx_locked_post_event(rev, queue);
|
0
|
514
|
112
|
515 } else {
|
|
516 rev->handler(rev);
|
|
517 }
|
|
518 }
|
|
519
|
|
520 wev = c->write;
|
|
521
|
|
522 if ((revents & POLLOUT) && wev->active) {
|
0
|
523
|
112
|
524 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
525 wev->posted_ready = 1;
|
0
|
526
|
112
|
527 } else {
|
|
528 wev->ready = 1;
|
|
529 }
|
|
530
|
|
531 if (flags & NGX_POST_EVENTS) {
|
|
532 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
533
|
|
534 } else {
|
|
535 wev->handler(wev);
|
0
|
536 }
|
|
537 }
|
|
538 }
|
|
539
|
112
|
540 ngx_mutex_unlock(ngx_posted_events_mutex);
|
0
|
541
|
|
542 return NGX_OK;
|
|
543 }
|
|
544
|
|
545
|
48
|
546 static void *
|
|
547 ngx_devpoll_create_conf(ngx_cycle_t *cycle)
|
0
|
548 {
|
|
549 ngx_devpoll_conf_t *dpcf;
|
|
550
|
50
|
551 dpcf = ngx_palloc(cycle->pool, sizeof(ngx_devpoll_conf_t));
|
|
552 if (dpcf == NULL) {
|
|
553 return NGX_CONF_ERROR;
|
|
554 }
|
0
|
555
|
|
556 dpcf->changes = NGX_CONF_UNSET;
|
|
557 dpcf->events = NGX_CONF_UNSET;
|
|
558
|
|
559 return dpcf;
|
|
560 }
|
|
561
|
|
562
|
48
|
563 static char *
|
|
564 ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
0
|
565 {
|
|
566 ngx_devpoll_conf_t *dpcf = conf;
|
|
567
|
212
|
568 ngx_conf_init_uint_value(dpcf->changes, 32);
|
|
569 ngx_conf_init_uint_value(dpcf->events, 32);
|
0
|
570
|
|
571 return NGX_CONF_OK;
|
|
572 }
|