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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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660
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4 * Copyright (C) Nginx, Inc.
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0
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5 */
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6
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7
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8 #ifndef _NGX_EVENT_H_INCLUDED_
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9 #define _NGX_EVENT_H_INCLUDED_
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10
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11
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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14
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15
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16 #define NGX_INVALID_INDEX 0xd0d0d0d0
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17
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18
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18
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19 #if (NGX_HAVE_IOCP)
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0
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20
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21 typedef struct {
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22 WSAOVERLAPPED ovlp;
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23 ngx_event_t *event;
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24 int error;
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25 } ngx_event_ovlp_t;
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26
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27 #endif
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28
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29
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30 typedef struct {
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31 ngx_uint_t lock;
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32
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33 ngx_event_t *events;
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34 ngx_event_t *last;
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35 } ngx_event_mutex_t;
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36
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37
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38 struct ngx_event_s {
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39 void *data;
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40
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41 unsigned write:1;
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42
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43 unsigned accept:1;
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44
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332
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45 /* used to detect the stale events in kqueue, rtsig, and epoll */
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0
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46 unsigned instance:1;
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47
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48 /*
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49 * the event was passed or would be passed to a kernel;
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50 * in aio mode - operation was posted.
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51 */
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52 unsigned active:1;
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53
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54 unsigned disabled:1;
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55
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56 /* the ready event; in aio mode 0 means that no operation can be posted */
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57 unsigned ready:1;
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58
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236
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59 unsigned oneshot:1;
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60
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0
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61 /* aio operation is complete */
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62 unsigned complete:1;
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63
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64 unsigned eof:1;
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65 unsigned error:1;
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66
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67 unsigned timedout:1;
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68 unsigned timer_set:1;
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69
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70 unsigned delayed:1;
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71
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72 unsigned read_discarded:1;
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73
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74 unsigned unexpected_eof:1;
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75
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76 unsigned deferred_accept:1;
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77
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78 /* the pending eof reported by kqueue or in aio chain operation */
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79 unsigned pending_eof:1;
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80
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81 #if !(NGX_THREADS)
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82 unsigned posted_ready:1;
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83 #endif
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84
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10
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85 #if (NGX_WIN32)
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0
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86 /* setsockopt(SO_UPDATE_ACCEPT_CONTEXT) was succesfull */
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87 unsigned accept_context_updated:1;
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88 #endif
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89
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18
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90 #if (NGX_HAVE_KQUEUE)
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0
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91 unsigned kq_vnode:1;
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92
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93 /* the pending errno reported by kqueue */
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94 int kq_errno;
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95 #endif
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96
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97 /*
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98 * kqueue only:
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99 * accept: number of sockets that wait to be accepted
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100 * read: bytes to read when event is ready
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101 * or lowat when event is set with NGX_LOWAT_EVENT flag
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102 * write: available space in buffer when event is ready
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103 * or lowat when event is set with NGX_LOWAT_EVENT flag
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104 *
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105 * iocp: TODO
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106 *
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107 * otherwise:
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108 * accept: 1 if accept many, 0 otherwise
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109 */
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110
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18
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111 #if (NGX_HAVE_KQUEUE) || (NGX_HAVE_IOCP)
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0
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112 int available;
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113 #else
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114 unsigned available:1;
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115 #endif
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116
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58
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117 ngx_event_handler_pt handler;
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0
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118
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119
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18
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120 #if (NGX_HAVE_AIO)
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0
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121
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18
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122 #if (NGX_HAVE_IOCP)
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123 ngx_event_ovlp_t ovlp;
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124 #else
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125 struct aiocb aiocb;
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126 #endif
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127
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128 #endif
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129
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324
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130 ngx_uint_t index;
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0
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131
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132 ngx_log_t *log;
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133
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108
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134 ngx_rbtree_node_t timer;
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0
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135
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136 unsigned closed:1;
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137
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112
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138 /* to test on worker exit */
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139 unsigned channel:1;
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366
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140 unsigned resolver:1;
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112
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141
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0
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142 #if (NGX_THREADS)
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143
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144 unsigned locked:1;
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145
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146 unsigned posted_ready:1;
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147 unsigned posted_timedout:1;
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148 unsigned posted_eof:1;
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149
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18
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150 #if (NGX_HAVE_KQUEUE)
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0
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151 /* the pending errno reported by kqueue */
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152 int posted_errno;
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153 #endif
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154
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18
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155 #if (NGX_HAVE_KQUEUE) || (NGX_HAVE_IOCP)
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0
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156 int posted_available;
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157 #else
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158 unsigned posted_available:1;
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159 #endif
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160
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161 ngx_atomic_t *lock;
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162 ngx_atomic_t *own_lock;
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163
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164 #endif
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165
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166 /* the links of the posted queue */
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167 ngx_event_t *next;
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168 ngx_event_t **prev;
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169
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170
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171 #if 0
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172
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173 /* the threads support */
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174
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175 /*
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176 * the event thread context, we store it here
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177 * if $(CC) does not understand __thread declaration
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178 * and pthread_getspecific() is too costly
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179 */
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180
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181 void *thr_ctx;
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182
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183 #if (NGX_EVENT_T_PADDING)
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184
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185 /* event should not cross cache line in SMP */
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186
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324
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187 uint32_t padding[NGX_EVENT_T_PADDING];
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0
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188 #endif
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189 #endif
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190 };
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191
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192
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518
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193 #if (NGX_HAVE_FILE_AIO)
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194
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195 struct ngx_event_aio_s {
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196 void *data;
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197 ngx_event_handler_pt handler;
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198 ngx_file_t *file;
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199
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200 ngx_fd_t fd;
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201
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202 #if (NGX_HAVE_EVENTFD)
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203 int64_t res;
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204 #if (NGX_TEST_BUILD_EPOLL)
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205 ngx_err_t err;
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206 size_t nbytes;
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207 #endif
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208 #else
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209 ngx_err_t err;
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210 size_t nbytes;
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211 #endif
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212
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520
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213 #if (NGX_HAVE_AIO_SENDFILE)
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214 off_t last_offset;
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215 #endif
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216
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518
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217 ngx_aiocb_t aiocb;
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218 ngx_event_t event;
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219 };
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220
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221 #endif
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222
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223
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0
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224 typedef struct {
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214
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225 in_addr_t mask;
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226 in_addr_t addr;
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227 } ngx_event_debug_t;
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228
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229
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230 typedef struct {
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324
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231 ngx_int_t (*add)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags);
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232 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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233
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324
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234 ngx_int_t (*enable)(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags);
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235 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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236
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237 ngx_int_t (*add_conn)(ngx_connection_t *c);
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324
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238 ngx_int_t (*del_conn)(ngx_connection_t *c, ngx_uint_t flags);
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0
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239
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2
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240 ngx_int_t (*process_changes)(ngx_cycle_t *cycle, ngx_uint_t nowait);
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112
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241 ngx_int_t (*process_events)(ngx_cycle_t *cycle, ngx_msec_t timer,
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242 ngx_uint_t flags);
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0
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243
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112
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244 ngx_int_t (*init)(ngx_cycle_t *cycle, ngx_msec_t timer);
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0
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245 void (*done)(ngx_cycle_t *cycle);
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246 } ngx_event_actions_t;
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247
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248
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249 extern ngx_event_actions_t ngx_event_actions;
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250
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251
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252 /*
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92
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253 * The event filter requires to read/write the whole data:
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0
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254 * select, poll, /dev/poll, kqueue, epoll.
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255 */
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256 #define NGX_USE_LEVEL_EVENT 0x00000001
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257
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258 /*
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259 * The event filter is deleted after a notification without an additional
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236
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260 * syscall: kqueue, epoll.
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0
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261 */
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262 #define NGX_USE_ONESHOT_EVENT 0x00000002
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263
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264 /*
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92
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265 * The event filter notifies only the changes and an initial level:
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0
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266 * kqueue, epoll.
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267 */
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268 #define NGX_USE_CLEAR_EVENT 0x00000004
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269
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270 /*
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92
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271 * The event filter has kqueue features: the eof flag, errno,
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0
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272 * available data, etc.
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273 */
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92
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274 #define NGX_USE_KQUEUE_EVENT 0x00000008
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0
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275
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276 /*
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92
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277 * The event filter supports low water mark: kqueue's NOTE_LOWAT.
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0
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278 * kqueue in FreeBSD 4.1-4.2 has no NOTE_LOWAT so we need a separate flag.
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279 */
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92
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280 #define NGX_USE_LOWAT_EVENT 0x00000010
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0
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281
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282 /*
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332
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283 * The event filter requires to do i/o operation until EAGAIN: epoll, rtsig.
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0
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284 */
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92
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285 #define NGX_USE_GREEDY_EVENT 0x00000020
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0
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286
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287 /*
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92
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288 * The event filter is epoll.
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0
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289 */
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290 #define NGX_USE_EPOLL_EVENT 0x00000040
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291
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292 /*
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332
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293 * No need to add or delete the event filters: rtsig.
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0
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294 */
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295 #define NGX_USE_RTSIG_EVENT 0x00000080
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296
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297 /*
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92
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298 * No need to add or delete the event filters: overlapped, aio_read,
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0
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299 * aioread, io_submit.
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300 */
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301 #define NGX_USE_AIO_EVENT 0x00000100
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302
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303 /*
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92
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304 * Need to add socket or handle only once: i/o completion port.
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18
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305 * It also requires NGX_HAVE_AIO and NGX_USE_AIO_EVENT to be set.
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0
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306 */
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307 #define NGX_USE_IOCP_EVENT 0x00000200
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308
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92
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309 /*
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310 * The event filter has no opaque data and requires file descriptors table:
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332
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311 * poll, /dev/poll, rtsig.
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92
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312 */
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313 #define NGX_USE_FD_EVENT 0x00000400
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314
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112
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315 /*
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316 * The event module handles periodic or absolute timer event by itself:
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332
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317 * 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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318 */
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319 #define NGX_USE_TIMER_EVENT 0x00000800
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320
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236
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321 /*
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322 * All event filters on file descriptor are deleted after a notification:
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323 * Solaris 10's event ports.
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324 */
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332
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325 #define NGX_USE_EVENTPORT_EVENT 0x00001000
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236
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326
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332
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327 /*
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328 * The event filter support vnode notifications: kqueue.
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329 */
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330 #define NGX_USE_VNODE_EVENT 0x00002000
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0
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331
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332
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333 /*
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332
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334 * The event filter is deleted just before the closing file.
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335 * Has no meaning for select and poll.
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336 * kqueue, epoll, rtsig, eventport: allows to avoid explicit delete,
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337 * because filter automatically is deleted
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338 * on file close,
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339 *
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340 * /dev/poll: we need to flush POLLREMOVE event
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341 * before closing file.
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0
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342 */
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332
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343 #define NGX_CLOSE_EVENT 1
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0
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344
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332
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345 /*
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346 * disable temporarily event filter, this may avoid locks
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347 * in kernel malloc()/free(): kqueue.
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348 */
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0
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349 #define NGX_DISABLE_EVENT 2
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350
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332
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351 /*
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352 * event must be passed to kernel right now, do not wait until batch processing.
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353 */
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354 #define NGX_FLUSH_EVENT 4
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355
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0
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356
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357 /* these flags have a meaning only for kqueue */
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358 #define NGX_LOWAT_EVENT 0
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359 #define NGX_VNODE_EVENT 0
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360
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361
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18
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362 #if (NGX_HAVE_KQUEUE)
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0
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363
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364 #define NGX_READ_EVENT EVFILT_READ
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365 #define NGX_WRITE_EVENT EVFILT_WRITE
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366
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367 #undef NGX_VNODE_EVENT
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368 #define NGX_VNODE_EVENT EVFILT_VNODE
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369
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370 /*
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332
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371 * NGX_CLOSE_EVENT, NGX_LOWAT_EVENT, and NGX_FLUSH_EVENT are the module flags
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372 * and they must not go into a kernel so we need to choose the value
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373 * that must not interfere with any existent and future kqueue flags.
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374 * kqueue has such values - EV_FLAG1, EV_EOF, and EV_ERROR:
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375 * they are reserved and cleared on a kernel entrance.
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0
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376 */
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377 #undef NGX_CLOSE_EVENT
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378 #define NGX_CLOSE_EVENT EV_EOF
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379
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380 #undef NGX_LOWAT_EVENT
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381 #define NGX_LOWAT_EVENT EV_FLAG1
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382
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332
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383 #undef NGX_FLUSH_EVENT
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384 #define NGX_FLUSH_EVENT EV_ERROR
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385
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0
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386 #define NGX_LEVEL_EVENT 0
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387 #define NGX_ONESHOT_EVENT EV_ONESHOT
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388 #define NGX_CLEAR_EVENT EV_CLEAR
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389
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390 #undef NGX_DISABLE_EVENT
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391 #define NGX_DISABLE_EVENT EV_DISABLE
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392
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393
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236
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394 #elif (NGX_HAVE_DEVPOLL || NGX_HAVE_EVENTPORT)
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0
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395
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396 #define NGX_READ_EVENT POLLIN
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397 #define NGX_WRITE_EVENT POLLOUT
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398
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399 #define NGX_LEVEL_EVENT 0
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400 #define NGX_ONESHOT_EVENT 1
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401
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402
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18
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403 #elif (NGX_HAVE_EPOLL)
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0
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404
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405 #define NGX_READ_EVENT EPOLLIN
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406 #define NGX_WRITE_EVENT EPOLLOUT
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407
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408 #define NGX_LEVEL_EVENT 0
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409 #define NGX_CLEAR_EVENT EPOLLET
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410 #define NGX_ONESHOT_EVENT 0x70000000
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411 #if 0
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412 #define NGX_ONESHOT_EVENT EPOLLONESHOT
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413 #endif
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414
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415
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18
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416 #elif (NGX_HAVE_POLL)
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0
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417
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418 #define NGX_READ_EVENT POLLIN
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419 #define NGX_WRITE_EVENT POLLOUT
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420
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421 #define NGX_LEVEL_EVENT 0
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422 #define NGX_ONESHOT_EVENT 1
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423
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424
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425 #else /* select */
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426
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427 #define NGX_READ_EVENT 0
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428 #define NGX_WRITE_EVENT 1
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429
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430 #define NGX_LEVEL_EVENT 0
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431 #define NGX_ONESHOT_EVENT 1
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432
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18
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433 #endif /* NGX_HAVE_KQUEUE */
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0
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434
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435
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18
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436 #if (NGX_HAVE_IOCP)
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0
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437 #define NGX_IOCP_ACCEPT 0
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438 #define NGX_IOCP_IO 1
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439 #define NGX_IOCP_CONNECT 2
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440 #endif
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441
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442
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443 #ifndef NGX_CLEAR_EVENT
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444 #define NGX_CLEAR_EVENT 0 /* dummy declaration */
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445 #endif
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446
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447
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448 #define ngx_process_changes ngx_event_actions.process_changes
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449 #define ngx_process_events ngx_event_actions.process_events
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450 #define ngx_done_events ngx_event_actions.done
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451
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452 #define ngx_add_event ngx_event_actions.add
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453 #define ngx_del_event ngx_event_actions.del
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454 #define ngx_add_conn ngx_event_actions.add_conn
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455 #define ngx_del_conn ngx_event_actions.del_conn
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456
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457 #define ngx_add_timer ngx_event_add_timer
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458 #define ngx_del_timer ngx_event_del_timer
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459
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460
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92
|
461 extern ngx_os_io_t ngx_io;
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462
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0
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463 #define ngx_recv ngx_io.recv
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464 #define ngx_recv_chain ngx_io.recv_chain
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354
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465 #define ngx_udp_recv ngx_io.udp_recv
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0
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466 #define ngx_send ngx_io.send
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|
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467 #define ngx_send_chain ngx_io.send_chain
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468
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|
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469
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470 #define NGX_EVENT_MODULE 0x544E5645 /* "EVNT" */
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471 #define NGX_EVENT_CONF 0x02000000
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472
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|
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473
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|
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474 typedef struct {
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475 ngx_uint_t connections;
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|
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476 ngx_uint_t use;
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477
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|
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478 ngx_flag_t multi_accept;
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|
|
479 ngx_flag_t accept_mutex;
|
|
|
480
|
|
|
481 ngx_msec_t accept_mutex_delay;
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|
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482
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|
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483 u_char *name;
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|
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484
|
|
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485 #if (NGX_DEBUG)
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|
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486 ngx_array_t debug_connection;
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|
|
487 #endif
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|
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488 } ngx_event_conf_t;
|
|
|
489
|
|
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490
|
|
|
491 typedef struct {
|
|
|
492 ngx_str_t *name;
|
|
|
493
|
|
|
494 void *(*create_conf)(ngx_cycle_t *cycle);
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|
|
495 char *(*init_conf)(ngx_cycle_t *cycle, void *conf);
|
|
|
496
|
|
|
497 ngx_event_actions_t actions;
|
|
|
498 } ngx_event_module_t;
|
|
|
499
|
|
|
500
|
|
|
501 extern ngx_atomic_t *ngx_connection_counter;
|
|
|
502
|
|
|
503 extern ngx_atomic_t *ngx_accept_mutex_ptr;
|
|
160
|
504 extern ngx_shmtx_t ngx_accept_mutex;
|
|
|
505 extern ngx_uint_t ngx_use_accept_mutex;
|
|
236
|
506 extern ngx_uint_t ngx_accept_events;
|
|
0
|
507 extern ngx_uint_t ngx_accept_mutex_held;
|
|
|
508 extern ngx_msec_t ngx_accept_mutex_delay;
|
|
|
509 extern ngx_int_t ngx_accept_disabled;
|
|
|
510
|
|
|
511
|
|
|
512 #if (NGX_STAT_STUB)
|
|
|
513
|
|
|
514 extern ngx_atomic_t *ngx_stat_accepted;
|
|
44
|
515 extern ngx_atomic_t *ngx_stat_handled;
|
|
0
|
516 extern ngx_atomic_t *ngx_stat_requests;
|
|
|
517 extern ngx_atomic_t *ngx_stat_active;
|
|
|
518 extern ngx_atomic_t *ngx_stat_reading;
|
|
|
519 extern ngx_atomic_t *ngx_stat_writing;
|
|
|
520
|
|
|
521 #endif
|
|
|
522
|
|
|
523
|
|
112
|
524 #define NGX_UPDATE_TIME 1
|
|
|
525 #define NGX_POST_EVENTS 2
|
|
|
526 #define NGX_POST_THREAD_EVENTS 4
|
|
0
|
527
|
|
|
528
|
|
112
|
529 extern sig_atomic_t ngx_event_timer_alarm;
|
|
0
|
530 extern ngx_uint_t ngx_event_flags;
|
|
|
531 extern ngx_module_t ngx_events_module;
|
|
|
532 extern ngx_module_t ngx_event_core_module;
|
|
|
533
|
|
|
534
|
|
|
535 #define ngx_event_get_conf(conf_ctx, module) \
|
|
|
536 (*(ngx_get_conf(conf_ctx, ngx_events_module))) [module.ctx_index];
|
|
|
537
|
|
|
538
|
|
|
539
|
|
|
540 void ngx_event_accept(ngx_event_t *ev);
|
|
|
541 ngx_int_t ngx_trylock_accept_mutex(ngx_cycle_t *cycle);
|
|
92
|
542 u_char *ngx_accept_log_error(ngx_log_t *log, u_char *buf, size_t len);
|
|
0
|
543
|
|
|
544
|
|
112
|
545 void ngx_process_events_and_timers(ngx_cycle_t *cycle);
|
|
324
|
546 ngx_int_t ngx_handle_read_event(ngx_event_t *rev, ngx_uint_t flags);
|
|
58
|
547 ngx_int_t ngx_handle_write_event(ngx_event_t *wev, size_t lowat);
|
|
|
548
|
|
|
549
|
|
10
|
550 #if (NGX_WIN32)
|
|
0
|
551 void ngx_event_acceptex(ngx_event_t *ev);
|
|
92
|
552 ngx_int_t ngx_event_post_acceptex(ngx_listening_t *ls, ngx_uint_t n);
|
|
|
553 u_char *ngx_acceptex_log_error(ngx_log_t *log, u_char *buf, size_t len);
|
|
0
|
554 #endif
|
|
|
555
|
|
|
556
|
|
2
|
557 ngx_int_t ngx_send_lowat(ngx_connection_t *c, size_t lowat);
|
|
|
558
|
|
|
559
|
|
0
|
560 /* used in ngx_log_debugX() */
|
|
|
561 #define ngx_event_ident(p) ((ngx_connection_t *) (p))->fd
|
|
|
562
|
|
|
563
|
|
|
564 #include <ngx_event_timer.h>
|
|
|
565 #include <ngx_event_posted.h>
|
|
|
566 #include <ngx_event_busy_lock.h>
|
|
|
567
|
|
10
|
568 #if (NGX_WIN32)
|
|
0
|
569 #include <ngx_iocp_module.h>
|
|
|
570 #endif
|
|
|
571
|
|
|
572
|
|
|
573 #endif /* _NGX_EVENT_H_INCLUDED_ */
|
