1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
|
/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <ngx_iocp_module.h>
static ngx_int_t ngx_iocp_init(ngx_cycle_t *cycle);
static void ngx_iocp_done(ngx_cycle_t *cycle);
static ngx_int_t ngx_iocp_add_event(ngx_event_t *ev, int event, u_int key);
static ngx_int_t ngx_iocp_del_connection(ngx_connection_t *c, u_int flags);
static ngx_int_t ngx_iocp_process_events(ngx_cycle_t *cycle);
static void *ngx_iocp_create_conf(ngx_cycle_t *cycle);
static char *ngx_iocp_init_conf(ngx_cycle_t *cycle, void *conf);
static ngx_str_t iocp_name = ngx_string("iocp");
static ngx_command_t ngx_iocp_commands[] = {
{ngx_string("iocp_threads"),
NGX_EVENT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
0,
offsetof(ngx_iocp_conf_t, threads),
NULL},
{ngx_string("post_acceptex"),
NGX_EVENT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
0,
offsetof(ngx_iocp_conf_t, post_acceptex),
NULL},
{ngx_string("acceptex_read"),
NGX_EVENT_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
0,
offsetof(ngx_iocp_conf_t, acceptex_read),
NULL},
ngx_null_command
};
ngx_event_module_t ngx_iocp_module_ctx = {
&iocp_name,
ngx_iocp_create_conf, /* create configuration */
ngx_iocp_init_conf, /* init configuration */
{
ngx_iocp_add_event, /* add an event */
NULL, /* delete an event */
NULL, /* enable an event */
NULL, /* disable an event */
NULL, /* add an connection */
ngx_iocp_del_connection, /* delete an connection */
NULL, /* process the changes */
ngx_iocp_process_events, /* process the events */
ngx_iocp_init, /* init the events */
ngx_iocp_done /* done the events */
}
};
ngx_module_t ngx_iocp_module = {
NGX_MODULE,
&ngx_iocp_module_ctx, /* module context */
ngx_iocp_commands, /* module directives */
NGX_EVENT_MODULE, /* module type */
NULL, /* init module */
NULL /* init process */
};
ngx_os_io_t ngx_iocp_io = {
ngx_overlapped_wsarecv,
NULL,
NULL,
ngx_overlapped_wsasend_chain,
0
};
static HANDLE iocp;
static ngx_int_t
ngx_iocp_init(ngx_cycle_t *cycle)
{
ngx_iocp_conf_t *cf;
cf = ngx_event_get_conf(cycle->conf_ctx, ngx_iocp_module);
if (iocp == NULL) {
iocp = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0,
cf->threads);
}
if (iocp == NULL) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"CreateIoCompletionPort() failed");
return NGX_ERROR;
}
ngx_io = ngx_iocp_io;
ngx_event_actions = ngx_iocp_module_ctx.actions;
ngx_event_flags = NGX_USE_AIO_EVENT|NGX_USE_IOCP_EVENT;
return NGX_OK;
}
static void
ngx_iocp_done(ngx_cycle_t *cycle)
{
if (CloseHandle(iocp) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"iocp CloseHandle() failed");
}
iocp = NULL;
}
static ngx_int_t
ngx_iocp_add_event(ngx_event_t *ev, int event, u_int key)
{
ngx_connection_t *c;
c = (ngx_connection_t *) ev->data;
c->read->active = 1;
c->write->active = 1;
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"iocp add: fd:%d k:%d ov:%p", c->fd, key, &ev->ovlp);
if (CreateIoCompletionPort((HANDLE) c->fd, iocp, key, 0) == NULL) {
ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
"CreateIoCompletionPort() failed");
return NGX_ERROR;
}
return NGX_OK;
}
static ngx_int_t
ngx_iocp_del_connection(ngx_connection_t *c, u_int flags)
{
#if 0
if (flags & NGX_CLOSE_EVENT) {
return NGX_OK;
}
if (CancelIo((HANDLE) c->fd) == 0) {
ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "CancelIo() failed");
return NGX_ERROR;
}
#endif
return NGX_OK;
}
static
ngx_int_t ngx_iocp_process_events(ngx_cycle_t *cycle)
{
int rc;
u_int key;
u_long bytes;
ngx_err_t err;
ngx_msec_t timer;
ngx_event_t *ev;
struct timeval tv;
ngx_epoch_msec_t delta;
ngx_event_ovlp_t *ovlp;
timer = ngx_event_find_timer();
ngx_old_elapsed_msec = ngx_elapsed_msec;
if (timer == 0) {
timer = INFINITE;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "iocp timer: %d", timer);
rc = GetQueuedCompletionStatus(iocp, &bytes, (LPDWORD) &key,
(LPOVERLAPPED *) &ovlp, timer);
if (rc == 0) {
err = ngx_errno;
} else {
err = 0;
}
ngx_gettimeofday(&tv);
ngx_time_update(tv.tv_sec);
ngx_log_debug4(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"iocp: %d b:%d k:%d ov:%p", rc, bytes, key, ovlp);
delta = ngx_elapsed_msec;
ngx_elapsed_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000
+ tv.tv_usec / 1000 - ngx_start_msec;
if (timer != INFINITE) {
delta = ngx_elapsed_msec - delta;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"iocp timer: %d, delta: %d", timer, (int) delta);
}
if (err) {
if (ovlp == NULL) {
if (err != WAIT_TIMEOUT) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
"GetQueuedCompletionStatus() failed");
return NGX_ERROR;
}
if (timer != INFINITE && delta) {
ngx_event_expire_timers((ngx_msec_t) delta);
}
return NGX_OK;
}
ovlp->error = err;
}
if (ovlp == NULL) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"GetQueuedCompletionStatus() returned no operation");
return NGX_ERROR;
}
ev = ovlp->event;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, err, "iocp event:%p", ev);
if (err == ERROR_NETNAME_DELETED /* the socket was closed */
|| err == ERROR_OPERATION_ABORTED /* the operation was canceled */)
{
/*
* the WSA_OPERATION_ABORTED completion notification
* for a file descriptor that was closed
*/
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, err,
"iocp: aborted event %p", ev);
if (timer != INFINITE && delta) {
ngx_event_expire_timers((ngx_msec_t) delta);
}
return NGX_OK;
}
if (err) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
"GetQueuedCompletionStatus() returned operation error");
}
switch (key) {
case NGX_IOCP_ACCEPT:
if (bytes) {
ev->ready = 1;
}
break;
case NGX_IOCP_IO:
ev->complete = 1;
ev->ready = 1;
break;
case NGX_IOCP_CONNECT:
ev->ready = 1;
}
ev->available = bytes;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"iocp event handler: %p", ev->event_handler);
ev->event_handler(ev);
if (timer != INFINITE && delta) {
ngx_event_expire_timers((ngx_msec_t) delta);
}
return NGX_OK;
}
static void *
ngx_iocp_create_conf(ngx_cycle_t *cycle)
{
ngx_iocp_conf_t *cf;
cf = ngx_palloc(cycle->pool, sizeof(ngx_iocp_conf_t));
if (cf == NULL) {
return NGX_CONF_ERROR;
}
cf->threads = NGX_CONF_UNSET;
cf->post_acceptex = NGX_CONF_UNSET;
cf->acceptex_read = NGX_CONF_UNSET;
return cf;
}
static char *
ngx_iocp_init_conf(ngx_cycle_t *cycle, void *conf)
{
ngx_iocp_conf_t *cf = conf;
ngx_conf_init_value(cf->threads, 0);
ngx_conf_init_value(cf->post_acceptex, 10);
ngx_conf_init_value(cf->acceptex_read, 1);
return NGX_CONF_OK;
}
|