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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 #ifndef _NGX_EVENT_H_INCLUDED_
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8 #define _NGX_EVENT_H_INCLUDED_
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9
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10
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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13
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14
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15 #define NGX_INVALID_INDEX 0xd0d0d0d0
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16
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17
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18
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18 #if (NGX_HAVE_IOCP)
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0
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19
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20 typedef struct {
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21 WSAOVERLAPPED ovlp;
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22 ngx_event_t *event;
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23 int error;
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24 } ngx_event_ovlp_t;
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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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30 ngx_uint_t lock;
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31
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32 ngx_event_t *events;
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33 ngx_event_t *last;
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34 } ngx_event_mutex_t;
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35
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36
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37 struct ngx_event_s {
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38 void *data;
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39
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40 unsigned write:1;
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41
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42 unsigned accept:1;
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43
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332
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44 /* used to detect the stale events in kqueue, rtsig, and epoll */
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0
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45 unsigned instance:1;
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46
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47 /*
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48 * the event was passed or would be passed to a kernel;
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49 * in aio mode - operation was posted.
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50 */
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51 unsigned active:1;
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52
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53 unsigned disabled:1;
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54
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55 /* the ready event; in aio mode 0 means that no operation can be posted */
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56 unsigned ready:1;
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57
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236
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58 unsigned oneshot:1;
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59
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0
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60 /* aio operation is complete */
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61 unsigned complete:1;
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62
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63 unsigned eof:1;
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64 unsigned error:1;
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65
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66 unsigned timedout:1;
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67 unsigned timer_set:1;
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68
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69 unsigned delayed:1;
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70
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71 unsigned read_discarded:1;
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72
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73 unsigned unexpected_eof:1;
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74
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75 unsigned deferred_accept:1;
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76
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77 /* the pending eof reported by kqueue or in aio chain operation */
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78 unsigned pending_eof:1;
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79
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80 #if !(NGX_THREADS)
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81 unsigned posted_ready:1;
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82 #endif
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83
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10
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84 #if (NGX_WIN32)
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0
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85 /* setsockopt(SO_UPDATE_ACCEPT_CONTEXT) was succesfull */
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86 unsigned accept_context_updated:1;
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87 #endif
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88
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18
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89 #if (NGX_HAVE_KQUEUE)
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0
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90 unsigned kq_vnode:1;
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91
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92 /* the pending errno reported by kqueue */
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93 int kq_errno;
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94 #endif
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95
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96 /*
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97 * kqueue only:
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98 * accept: number of sockets that wait to be accepted
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99 * read: bytes to read when event is ready
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100 * or lowat when event is set with NGX_LOWAT_EVENT flag
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101 * write: available space in buffer when event is ready
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102 * or lowat when event is set with NGX_LOWAT_EVENT flag
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103 *
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104 * iocp: TODO
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105 *
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106 * otherwise:
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107 * accept: 1 if accept many, 0 otherwise
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108 */
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109
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18
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110 #if (NGX_HAVE_KQUEUE) || (NGX_HAVE_IOCP)
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0
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111 int available;
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112 #else
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113 unsigned available:1;
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114 #endif
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115
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58
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116 ngx_event_handler_pt handler;
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0
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117
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118
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18
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119 #if (NGX_HAVE_AIO)
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120
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18
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121 #if (NGX_HAVE_IOCP)
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122 ngx_event_ovlp_t ovlp;
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123 #else
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124 struct aiocb aiocb;
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125 #endif
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126
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127 #endif
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128
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324
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129 ngx_uint_t index;
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0
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130
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131 ngx_log_t *log;
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132
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108
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133 ngx_rbtree_node_t timer;
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0
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134
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135 unsigned closed:1;
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136
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112
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137 /* to test on worker exit */
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138 unsigned channel:1;
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139
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0
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140 #if (NGX_THREADS)
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141
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142 unsigned locked:1;
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143
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144 unsigned posted_ready:1;
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145 unsigned posted_timedout:1;
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146 unsigned posted_eof:1;
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147
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18
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148 #if (NGX_HAVE_KQUEUE)
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149 /* the pending errno reported by kqueue */
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150 int posted_errno;
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151 #endif
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152
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18
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153 #if (NGX_HAVE_KQUEUE) || (NGX_HAVE_IOCP)
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0
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154 int posted_available;
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155 #else
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156 unsigned posted_available:1;
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157 #endif
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158
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159 ngx_atomic_t *lock;
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160 ngx_atomic_t *own_lock;
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161
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162 #endif
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163
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164 /* the links of the posted queue */
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165 ngx_event_t *next;
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166 ngx_event_t **prev;
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167
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168
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169 #if 0
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170
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171 /* the threads support */
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172
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173 /*
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174 * the event thread context, we store it here
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175 * if $(CC) does not understand __thread declaration
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176 * and pthread_getspecific() is too costly
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177 */
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178
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179 void *thr_ctx;
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180
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181 #if (NGX_EVENT_T_PADDING)
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182
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183 /* event should not cross cache line in SMP */
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184
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324
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185 uint32_t padding[NGX_EVENT_T_PADDING];
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0
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186 #endif
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187 #endif
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188 };
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189
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190
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191 typedef struct {
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214
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192 in_addr_t mask;
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193 in_addr_t addr;
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194 } ngx_event_debug_t;
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195
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196
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197 typedef struct {
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324
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198 ngx_int_t (*add)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags);
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199 ngx_int_t (*del)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags);
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0
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200
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324
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201 ngx_int_t (*enable)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags);
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202 ngx_int_t (*disable)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags);
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0
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203
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204 ngx_int_t (*add_conn)(ngx_connection_t *c);
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324
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205 ngx_int_t (*del_conn)(ngx_connection_t *c, ngx_uint_t flags);
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0
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206
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2
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207 ngx_int_t (*process_changes)(ngx_cycle_t *cycle, ngx_uint_t nowait);
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112
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208 ngx_int_t (*process_events)(ngx_cycle_t *cycle, ngx_msec_t timer,
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209 ngx_uint_t flags);
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0
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210
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112
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211 ngx_int_t (*init)(ngx_cycle_t *cycle, ngx_msec_t timer);
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212 void (*done)(ngx_cycle_t *cycle);
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213 } ngx_event_actions_t;
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214
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215
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216 extern ngx_event_actions_t ngx_event_actions;
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217
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218
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219 /*
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92
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220 * The event filter requires to read/write the whole data:
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221 * select, poll, /dev/poll, kqueue, epoll.
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222 */
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223 #define NGX_USE_LEVEL_EVENT 0x00000001
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224
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225 /*
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226 * The event filter is deleted after a notification without an additional
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236
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227 * syscall: kqueue, epoll.
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0
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228 */
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229 #define NGX_USE_ONESHOT_EVENT 0x00000002
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230
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231 /*
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92
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232 * The event filter notifies only the changes and an initial level:
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233 * kqueue, epoll.
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234 */
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235 #define NGX_USE_CLEAR_EVENT 0x00000004
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236
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237 /*
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92
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238 * The event filter has kqueue features: the eof flag, errno,
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239 * available data, etc.
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240 */
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92
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241 #define NGX_USE_KQUEUE_EVENT 0x00000008
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0
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242
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243 /*
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92
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244 * The event filter supports low water mark: kqueue's NOTE_LOWAT.
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245 * kqueue in FreeBSD 4.1-4.2 has no NOTE_LOWAT so we need a separate flag.
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246 */
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92
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247 #define NGX_USE_LOWAT_EVENT 0x00000010
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0
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248
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249 /*
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332
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250 * The event filter requires to do i/o operation until EAGAIN: epoll, rtsig.
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0
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251 */
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92
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252 #define NGX_USE_GREEDY_EVENT 0x00000020
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0
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253
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254 /*
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92
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255 * The event filter is epoll.
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256 */
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257 #define NGX_USE_EPOLL_EVENT 0x00000040
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258
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259 /*
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332
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260 * No need to add or delete the event filters: rtsig.
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0
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261 */
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262 #define NGX_USE_RTSIG_EVENT 0x00000080
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263
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264 /*
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92
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265 * No need to add or delete the event filters: overlapped, aio_read,
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266 * aioread, io_submit.
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267 */
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268 #define NGX_USE_AIO_EVENT 0x00000100
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269
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270 /*
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92
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271 * Need to add socket or handle only once: i/o completion port.
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18
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272 * It also requires NGX_HAVE_AIO and NGX_USE_AIO_EVENT to be set.
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273 */
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274 #define NGX_USE_IOCP_EVENT 0x00000200
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275
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92
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276 /*
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277 * The event filter has no opaque data and requires file descriptors table:
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332
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278 * poll, /dev/poll, rtsig.
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92
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279 */
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280 #define NGX_USE_FD_EVENT 0x00000400
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281
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112
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282 /*
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283 * The event module handles periodic or absolute timer event by itself:
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332
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284 * kqueue in FreeBSD 4.4, NetBSD 2.0, and MacOSX 10.4, Solaris 10's event ports.
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112
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285 */
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286 #define NGX_USE_TIMER_EVENT 0x00000800
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287
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236
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288 /*
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289 * All event filters on file descriptor are deleted after a notification:
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290 * Solaris 10's event ports.
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291 */
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332
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292 #define NGX_USE_EVENTPORT_EVENT 0x00001000
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236
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293
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332
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294 /*
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295 * The event filter support vnode notifications: kqueue.
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296 */
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297 #define NGX_USE_VNODE_EVENT 0x00002000
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0
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298
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299
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300 /*
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332
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301 * The event filter is deleted just before the closing file.
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302 * Has no meaning for select and poll.
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303 * kqueue, epoll, rtsig, eventport: allows to avoid explicit delete,
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304 * because filter automatically is deleted
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305 * on file close,
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306 *
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307 * /dev/poll: we need to flush POLLREMOVE event
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308 * before closing file.
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0
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309 */
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332
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310 #define NGX_CLOSE_EVENT 1
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0
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311
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332
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312 /*
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313 * disable temporarily event filter, this may avoid locks
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314 * in kernel malloc()/free(): kqueue.
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315 */
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0
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316 #define NGX_DISABLE_EVENT 2
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317
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332
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318 /*
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319 * event must be passed to kernel right now, do not wait until batch processing.
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320 */
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321 #define NGX_FLUSH_EVENT 4
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322
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0
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323
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324 /* these flags have a meaning only for kqueue */
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325 #define NGX_LOWAT_EVENT 0
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326 #define NGX_VNODE_EVENT 0
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327
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328
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18
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329 #if (NGX_HAVE_KQUEUE)
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0
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330
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331 #define NGX_READ_EVENT EVFILT_READ
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332 #define NGX_WRITE_EVENT EVFILT_WRITE
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333
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334 #undef NGX_VNODE_EVENT
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335 #define NGX_VNODE_EVENT EVFILT_VNODE
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336
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337 /*
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332
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338 * NGX_CLOSE_EVENT, NGX_LOWAT_EVENT, and NGX_FLUSH_EVENT are the module flags
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339 * and they must not go into a kernel so we need to choose the value
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340 * that must not interfere with any existent and future kqueue flags.
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341 * kqueue has such values - EV_FLAG1, EV_EOF, and EV_ERROR:
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342 * they are reserved and cleared on a kernel entrance.
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0
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343 */
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344 #undef NGX_CLOSE_EVENT
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345 #define NGX_CLOSE_EVENT EV_EOF
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346
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347 #undef NGX_LOWAT_EVENT
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348 #define NGX_LOWAT_EVENT EV_FLAG1
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349
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332
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350 #undef NGX_FLUSH_EVENT
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351 #define NGX_FLUSH_EVENT EV_ERROR
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352
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0
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353 #define NGX_LEVEL_EVENT 0
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354 #define NGX_ONESHOT_EVENT EV_ONESHOT
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355 #define NGX_CLEAR_EVENT EV_CLEAR
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356
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357 #undef NGX_DISABLE_EVENT
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358 #define NGX_DISABLE_EVENT EV_DISABLE
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359
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360
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236
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361 #elif (NGX_HAVE_DEVPOLL || NGX_HAVE_EVENTPORT)
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0
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362
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363 #define NGX_READ_EVENT POLLIN
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364 #define NGX_WRITE_EVENT POLLOUT
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365
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366 #define NGX_LEVEL_EVENT 0
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367 #define NGX_ONESHOT_EVENT 1
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368
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369
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18
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370 #elif (NGX_HAVE_EPOLL)
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0
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371
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372 #define NGX_READ_EVENT EPOLLIN
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373 #define NGX_WRITE_EVENT EPOLLOUT
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374
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375 #define NGX_LEVEL_EVENT 0
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376 #define NGX_CLEAR_EVENT EPOLLET
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377 #define NGX_ONESHOT_EVENT 0x70000000
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378 #if 0
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379 #define NGX_ONESHOT_EVENT EPOLLONESHOT
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380 #endif
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381
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382
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18
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383 #elif (NGX_HAVE_POLL)
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0
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384
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385 #define NGX_READ_EVENT POLLIN
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386 #define NGX_WRITE_EVENT POLLOUT
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387
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388 #define NGX_LEVEL_EVENT 0
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389 #define NGX_ONESHOT_EVENT 1
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390
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391
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392 #else /* select */
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393
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394 #define NGX_READ_EVENT 0
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395 #define NGX_WRITE_EVENT 1
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396
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397 #define NGX_LEVEL_EVENT 0
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398 #define NGX_ONESHOT_EVENT 1
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399
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18
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400 #endif /* NGX_HAVE_KQUEUE */
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0
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401
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402
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18
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403 #if (NGX_HAVE_IOCP)
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0
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404 #define NGX_IOCP_ACCEPT 0
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405 #define NGX_IOCP_IO 1
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406 #define NGX_IOCP_CONNECT 2
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407 #endif
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408
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409
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410 #ifndef NGX_CLEAR_EVENT
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411 #define NGX_CLEAR_EVENT 0 /* dummy declaration */
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412 #endif
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413
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414
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415 #define ngx_process_changes ngx_event_actions.process_changes
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416 #define ngx_process_events ngx_event_actions.process_events
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417 #define ngx_done_events ngx_event_actions.done
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418
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419 #define ngx_add_event ngx_event_actions.add
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420 #define ngx_del_event ngx_event_actions.del
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421 #define ngx_add_conn ngx_event_actions.add_conn
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422 #define ngx_del_conn ngx_event_actions.del_conn
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423
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424 #define ngx_add_timer ngx_event_add_timer
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425 #define ngx_del_timer ngx_event_del_timer
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426
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427
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92
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428 extern ngx_os_io_t ngx_io;
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429
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0
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430 #define ngx_recv ngx_io.recv
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431 #define ngx_recv_chain ngx_io.recv_chain
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432 #define ngx_send ngx_io.send
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433 #define ngx_send_chain ngx_io.send_chain
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434
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435
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436 #define NGX_EVENT_MODULE 0x544E5645 /* "EVNT" */
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437 #define NGX_EVENT_CONF 0x02000000
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438
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439
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440 typedef struct {
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441 ngx_uint_t connections;
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442 ngx_uint_t use;
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443
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444 ngx_flag_t multi_accept;
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445 ngx_flag_t accept_mutex;
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446
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447 ngx_msec_t accept_mutex_delay;
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448
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449 u_char *name;
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450
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451 #if (NGX_DEBUG)
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452 ngx_array_t debug_connection;
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453 #endif
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454 } ngx_event_conf_t;
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455
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456
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457 typedef struct {
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458 ngx_str_t *name;
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459
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460 void *(*create_conf)(ngx_cycle_t *cycle);
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461 char *(*init_conf)(ngx_cycle_t *cycle, void *conf);
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462
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463 ngx_event_actions_t actions;
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464 } ngx_event_module_t;
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465
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466
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467 extern ngx_atomic_t *ngx_connection_counter;
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468
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469 extern ngx_atomic_t *ngx_accept_mutex_ptr;
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160
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470 extern ngx_shmtx_t ngx_accept_mutex;
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471 extern ngx_uint_t ngx_use_accept_mutex;
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236
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472 extern ngx_uint_t ngx_accept_events;
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0
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473 extern ngx_uint_t ngx_accept_mutex_held;
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474 extern ngx_msec_t ngx_accept_mutex_delay;
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475 extern ngx_int_t ngx_accept_disabled;
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476
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477
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478 #if (NGX_STAT_STUB)
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479
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480 extern ngx_atomic_t *ngx_stat_accepted;
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44
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481 extern ngx_atomic_t *ngx_stat_handled;
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0
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482 extern ngx_atomic_t *ngx_stat_requests;
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483 extern ngx_atomic_t *ngx_stat_active;
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484 extern ngx_atomic_t *ngx_stat_reading;
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485 extern ngx_atomic_t *ngx_stat_writing;
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486
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487 #endif
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488
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489
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112
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490 #define NGX_UPDATE_TIME 1
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491 #define NGX_POST_EVENTS 2
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492 #define NGX_POST_THREAD_EVENTS 4
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0
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493
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494
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112
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495 extern sig_atomic_t ngx_event_timer_alarm;
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0
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496 extern ngx_uint_t ngx_event_flags;
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497 extern ngx_module_t ngx_events_module;
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498 extern ngx_module_t ngx_event_core_module;
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499
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500
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501 #define ngx_event_get_conf(conf_ctx, module) \
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502 (*(ngx_get_conf(conf_ctx, ngx_events_module))) [module.ctx_index];
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503
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504
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505
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506 void ngx_event_accept(ngx_event_t *ev);
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507 ngx_int_t ngx_trylock_accept_mutex(ngx_cycle_t *cycle);
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92
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508 u_char *ngx_accept_log_error(ngx_log_t *log, u_char *buf, size_t len);
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0
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509
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510
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112
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511 void ngx_process_events_and_timers(ngx_cycle_t *cycle);
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324
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512 ngx_int_t ngx_handle_read_event(ngx_event_t *rev, ngx_uint_t flags);
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58
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513 ngx_int_t ngx_handle_write_event(ngx_event_t *wev, size_t lowat);
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514
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515
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10
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516 #if (NGX_WIN32)
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0
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517 void ngx_event_acceptex(ngx_event_t *ev);
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92
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518 ngx_int_t ngx_event_post_acceptex(ngx_listening_t *ls, ngx_uint_t n);
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519 u_char *ngx_acceptex_log_error(ngx_log_t *log, u_char *buf, size_t len);
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0
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520 #endif
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521
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522
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2
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523 ngx_int_t ngx_send_lowat(ngx_connection_t *c, size_t lowat);
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524
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525
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0
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526 /* used in ngx_log_debugX() */
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527 #define ngx_event_ident(p) ((ngx_connection_t *) (p))->fd
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528
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529
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530 #include <ngx_event_timer.h>
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531 #include <ngx_event_posted.h>
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532 #include <ngx_event_busy_lock.h>
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533
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|
10
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534 #if (NGX_WIN32)
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0
|
535 #include <ngx_iocp_module.h>
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536 #endif
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537
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538
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539 #endif /* _NGX_EVENT_H_INCLUDED_ */
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