0
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
|
4 */
|
|
5
|
|
6
|
|
7 #include <ngx_config.h>
|
|
8 #include <ngx_core.h>
|
|
9 #include <ngx_event.h>
|
|
10 #include <ngx_aio.h>
|
|
11
|
18
|
12 #if (NGX_HAVE_KQUEUE)
|
0
|
13 #include <ngx_kqueue_module.h>
|
|
14 #endif
|
|
15
|
|
16
|
48
|
17 static ngx_int_t ngx_aio_init(ngx_cycle_t *cycle);
|
0
|
18 static void ngx_aio_done(ngx_cycle_t *cycle);
|
48
|
19 static ngx_int_t ngx_aio_add_event(ngx_event_t *ev, int event, u_int flags);
|
|
20 static ngx_int_t ngx_aio_del_event(ngx_event_t *ev, int event, u_int flags);
|
|
21 static ngx_int_t ngx_aio_del_connection(ngx_connection_t *c, u_int flags);
|
|
22 static ngx_int_t ngx_aio_process_events(ngx_cycle_t *cycle);
|
0
|
23
|
|
24
|
|
25 ngx_os_io_t ngx_os_aio = {
|
|
26 ngx_aio_read,
|
|
27 ngx_aio_read_chain,
|
|
28 ngx_aio_write,
|
|
29 ngx_aio_write_chain,
|
18
|
30 0
|
0
|
31 };
|
|
32
|
|
33
|
|
34 static ngx_str_t aio_name = ngx_string("aio");
|
|
35
|
|
36 ngx_event_module_t ngx_aio_module_ctx = {
|
|
37 &aio_name,
|
|
38 NULL, /* create configuration */
|
|
39 NULL, /* init configuration */
|
|
40
|
|
41 {
|
|
42 ngx_aio_add_event, /* add an event */
|
|
43 ngx_aio_del_event, /* delete an event */
|
|
44 NULL, /* enable an event */
|
|
45 NULL, /* disable an event */
|
|
46 NULL, /* add an connection */
|
|
47 ngx_aio_del_connection, /* delete an connection */
|
|
48 NULL, /* process the changes */
|
|
49 ngx_aio_process_events, /* process the events */
|
|
50 ngx_aio_init, /* init the events */
|
|
51 ngx_aio_done /* done the events */
|
|
52 }
|
|
53
|
|
54 };
|
|
55
|
|
56 ngx_module_t ngx_aio_module = {
|
58
|
57 NGX_MODULE_V1,
|
0
|
58 &ngx_aio_module_ctx, /* module context */
|
|
59 NULL, /* module directives */
|
|
60 NGX_EVENT_MODULE, /* module type */
|
90
|
61 NULL, /* init master */
|
0
|
62 NULL, /* init module */
|
90
|
63 NULL, /* init process */
|
|
64 NULL, /* init thread */
|
|
65 NULL, /* exit thread */
|
|
66 NULL, /* exit process */
|
|
67 NULL, /* exit master */
|
|
68 NGX_MODULE_V1_PADDING
|
0
|
69 };
|
|
70
|
|
71
|
|
72
|
18
|
73 #if (NGX_HAVE_KQUEUE)
|
0
|
74
|
48
|
75 static ngx_int_t
|
|
76 ngx_aio_init(ngx_cycle_t *cycle)
|
0
|
77 {
|
|
78 if (ngx_kqueue_module_ctx.actions.init(cycle) == NGX_ERROR) {
|
|
79 return NGX_ERROR;
|
|
80 }
|
|
81
|
|
82 ngx_io = ngx_os_aio;
|
|
83
|
|
84 ngx_event_flags = NGX_USE_AIO_EVENT;
|
|
85 ngx_event_actions = ngx_aio_module_ctx.actions;
|
|
86
|
|
87
|
|
88 return NGX_OK;
|
|
89 }
|
|
90
|
|
91
|
48
|
92 static void
|
|
93 ngx_aio_done(ngx_cycle_t *cycle)
|
0
|
94 {
|
|
95 ngx_kqueue_module_ctx.actions.done(cycle);
|
|
96 }
|
|
97
|
|
98
|
48
|
99 /* the event adding and deleting are needed for the listening sockets */
|
0
|
100
|
48
|
101 static ngx_int_t
|
|
102 ngx_aio_add_event(ngx_event_t *ev, int event, u_int flags)
|
0
|
103 {
|
|
104 return ngx_kqueue_module_ctx.actions.add(ev, event, flags);
|
|
105 }
|
|
106
|
|
107
|
48
|
108 static ngx_int_t
|
|
109 ngx_aio_del_event(ngx_event_t *ev, int event, u_int flags)
|
0
|
110 {
|
|
111 return ngx_kqueue_module_ctx.actions.del(ev, event, flags);
|
|
112 }
|
|
113
|
|
114
|
48
|
115 static ngx_int_t
|
|
116 ngx_aio_del_connection(ngx_connection_t *c, u_int flags)
|
0
|
117 {
|
|
118 int rc;
|
|
119
|
|
120 if (c->read->active == 0 && c->write->active == 0) {
|
|
121 return NGX_OK;
|
|
122 }
|
|
123
|
10
|
124 if (flags & NGX_CLOSE_EVENT) {
|
|
125 return NGX_OK;
|
|
126 }
|
|
127
|
0
|
128 rc = aio_cancel(c->fd, NULL);
|
|
129
|
|
130 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_cancel: %d", rc);
|
|
131
|
|
132 if (rc == AIO_CANCELED) {
|
|
133 c->read->active = c->write->active = 0;
|
|
134 return NGX_OK;
|
|
135 }
|
|
136
|
|
137 if (rc == AIO_ALLDONE) {
|
|
138 c->read->active = c->write->active = 0;
|
|
139 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
|
|
140 "aio_cancel() returned AIO_ALLDONE");
|
|
141 return NGX_OK;
|
|
142 }
|
|
143
|
|
144 if (rc == -1) {
|
|
145 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
146 "aio_cancel() failed");
|
|
147 return NGX_ERROR;
|
|
148 }
|
|
149
|
|
150 if (rc == AIO_NOTCANCELED) {
|
|
151 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
|
|
152 "aio_cancel() returned AIO_NOTCANCELED");
|
|
153
|
|
154 return NGX_ERROR;
|
|
155 }
|
|
156
|
|
157 return NGX_OK;
|
|
158 }
|
|
159
|
|
160
|
48
|
161 static ngx_int_t
|
|
162 ngx_aio_process_events(ngx_cycle_t *cycle)
|
0
|
163 {
|
|
164 return ngx_kqueue_module_ctx.actions.process_events(cycle);
|
|
165 }
|
|
166
|
18
|
167 #endif /* NGX_HAVE_KQUEUE */
|
0
|
168
|
|
169
|
|
170 #if 0
|
|
171
|
|
172 /* 1 */
|
|
173 int ngx_posix_aio_process_events(ngx_log_t *log)
|
|
174 {
|
|
175 listen via SIGIO;
|
|
176 aio_* via SIGxxx;
|
|
177
|
|
178 sigsuspend()/sigwaitinfo()/sigtimedwait();
|
|
179 }
|
|
180
|
|
181 /* 2 */
|
|
182 int ngx_posix_aio_process_events(ngx_log_t *log)
|
|
183 {
|
|
184 unmask signal
|
|
185
|
|
186 listen via SIGIO;
|
|
187
|
|
188 /* BUG: SIGIO can be delivered before aio_*() */
|
|
189
|
|
190 aio_suspend()/aiowait()/aio_waitcomplete() with timeout
|
|
191
|
|
192 mask signal
|
|
193
|
|
194 if (ngx_socket_errno == NGX_EINTR)
|
|
195 look listen
|
|
196 select()/accept() nb listen sockets
|
|
197 else
|
|
198 aio
|
|
199 }
|
|
200
|
|
201 /* 3 */
|
|
202 int ngx_posix_aio_process_events(ngx_log_t *log)
|
|
203 {
|
|
204 #if 0
|
|
205 unmask signal
|
|
206
|
|
207 /* BUG: AIO signal can be delivered before select() */
|
|
208
|
|
209 select(listen);
|
|
210
|
|
211 mask signal
|
|
212 #endif
|
|
213
|
|
214 pselect(listen, mask);
|
|
215
|
|
216 if (ngx_socket_errno == NGX_EINTR)
|
|
217 look ready array
|
|
218 }
|
|
219
|
|
220 void aio_sig_handler(int signo, siginfo_t *siginfo, void *context)
|
|
221 {
|
|
222 push siginfo->si_value.sival_ptr
|
|
223 }
|
|
224
|
|
225 #endif
|