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comparison src/os/unix/ngx_process_cycle.c @ 317:1308b98496a2

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nginx-0.0.3-2004-04-15-19:34:36 import
author Igor Sysoev <igor@sysoev.ru>
date Thu, 15 Apr 2004 15:34:36 +0000
parents 39b6f2df45c0
children 56496082668b
comparison
equal deleted inserted replaced
316:a0beefedaf94 317:1308b98496a2
4 #include <ngx_event.h> 4 #include <ngx_event.h>
5 5
6 #include <nginx.h> 6 #include <nginx.h>
7 7
8 8
9 static void ngx_start_worker_processes(ngx_cycle_y *cycle, ngx_int_t n)
9 static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx); 10 static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx);
10 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data); 11 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data);
11 #if (NGX_THREADS) 12 #if (NGX_THREADS)
12 static int ngx_worker_thread_cycle(void *data); 13 static int ngx_worker_thread_cycle(void *data);
13 #endif 14 #endif
14 15
15 16
16 ngx_int_t ngx_process; 17 ngx_int_t ngx_process;
17 ngx_pid_t ngx_pid; 18 ngx_pid_t ngx_pid;
18 ngx_pid_t ngx_new_binary;
19 ngx_int_t ngx_inherited;
20 ngx_int_t ngx_threaded; 19 ngx_int_t ngx_threaded;
21 20
22 sig_atomic_t ngx_reap; 21 sig_atomic_t ngx_reap;
23 sig_atomic_t ngx_timer; 22 sig_atomic_t ngx_timer;
24 sig_atomic_t ngx_terminate; 23 sig_atomic_t ngx_terminate;
25 sig_atomic_t ngx_quit; 24 sig_atomic_t ngx_quit;
26 sig_atomic_t ngx_noaccept;
27 sig_atomic_t ngx_reconfigure; 25 sig_atomic_t ngx_reconfigure;
28 sig_atomic_t ngx_reopen; 26 sig_atomic_t ngx_reopen;
27
29 sig_atomic_t ngx_change_binary; 28 sig_atomic_t ngx_change_binary;
30 29 ngx_pid_t ngx_new_binary;
31 30 ngx_int_t ngx_inherited;
32 /* TODO: broken NGX_PROCESS_SINGLE */ 31
32 sig_atomic_t ngx_noaccept;
33 ngx_uint_t ngx_noaccepting;
34 ngx_uint_t ngx_restart;
35
36
37 void ngx_master_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx)
38 {
39 int signo;
40 sigset_t set;
41 struct timeval tv;
42 struct itimerval itv;
43 ngx_uint_t i, live;
44 ngx_msec_t delay;
45 ngx_core_conf_t *ccf;
46
47 sigemptyset(&set);
48 sigaddset(&set, SIGCHLD);
49 sigaddset(&set, SIGALRM);
50 sigaddset(&set, SIGINT);
51 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
52 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
53 sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL));
54 sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL));
55 sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
56 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
57
58 if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
59 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
60 "sigprocmask() failed");
61 }
62
63 sigemptyset(&set);
64
65 ngx_setproctitle("master process");
66
67 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
68
69 ngx_start_worker_processes(ccf->worker_processes);
70
71 ngx_new_binary = 0;
72 delay = 0;
73 signo = 0;
74 live = 1;
75
76 for ( ;; ) {
77 if (delay) {
78 delay *= 2;
79
80 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
81 "temination cycle: %d", delay);
82
83 itv.it_interval.tv_sec = 0;
84 itv.it_interval.tv_usec = 0;
85 itv.it_value.tv_sec = delay / 1000;
86 itv.it_value.tv_usec = (delay % 1000 ) * 1000;
87
88 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
89 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
90 "setitimer() failed");
91 }
92 }
93
94 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend");
95
96 sigsuspend(&set);
97
98 ngx_gettimeofday(&tv);
99 ngx_time_update(tv.tv_sec);
100
101 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "wake up");
102
103 if (ngx_reap) {
104 ngx_reap = 0;
105 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap childs");
106
107 live = 0;
108 for (i = 0; i < ngx_last_process; i++) {
109
110 ngx_log_debug5(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
111 "child: " PID_T_FMT " e:%d t:%d d:%d r:%d",
112 ngx_processes[i].pid,
113 ngx_processes[i].exiting,
114 ngx_processes[i].exited,
115 ngx_processes[i].detached,
116 ngx_processes[i].respawn);
117
118 if (ngx_processes[i].exited) {
119
120 if (ngx_processes[i].respawn
121 && !ngx_processes[i].exiting
122 && !ngx_terminate
123 && !ngx_quit)
124 {
125 if (ngx_spawn_process(cycle, ngx_processes[i].proc,
126 ngx_processes[i].data,
127 ngx_processes[i].name, i)
128 == NGX_ERROR)
129 {
130 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
131 "can not respawn %s",
132 ngx_processes[i].name);
133 continue;
134 }
135
136 live = 1;
137
138 continue;
139 }
140
141 if (ngx_processes[i].pid == ngx_new_binary) {
142 ngx_new_binary = 0;
143 if (ngx_noaccepting) {
144 ngx_restart = 1;
145 ngx_noaccepting = 0;
146 }
147 }
148
149 if (i != --ngx_last_process) {
150 ngx_processes[i--] = ngx_processes[ngx_last_process];
151 }
152
153 } else if (ngx_processes[i].exiting
154 || !ngx_processes[i].detached)
155 {
156 live = 1;
157 }
158 }
159 }
160
161 if (!live && (ngx_terminate || ngx_quit)) {
162 ngx_master_exit(cycle, ctx);
163 }
164
165 if (ngx_terminate) {
166 if (delay == 0) {
167 delay = 50;
168 }
169
170 if (delay > 1000) {
171 signo = SIGKILL;
172 } else {
173 signo = ngx_signal_value(NGX_TERMINATE_SIGNAL);
174 }
175
176 } else if (ngx_quit) {
177 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
178
179 } else if (ngx_timer) {
180 ngx_start_worker_processes(ccf->worker_processes);
181 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
182
183 } else if (ngx_reconfigure) {
184 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
185
186 cycle = ngx_init_cycle(cycle);
187 if (cycle == NULL) {
188 cycle = (ngx_cycle_t *) ngx_cycle;
189 continue;
190 }
191
192 ngx_cycle = cycle;
193 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
194 ngx_core_module);
195 ngx_start_worker_processes(ccf->worker_processes);
196
197 ngx_reconfigure = 0;
198 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
199
200 } else if (ngx_restart) {
201 ngx_start_worker_processes(ccf->worker_processes);
202 ngx_restart = 0;
203
204 } else if (ngx_reopen) {
205 if (ngx_process == NGX_PROCESS_MASTER) {
206 signo = ngx_signal_value(NGX_REOPEN_SIGNAL);
207 ngx_reopen = 0;
208
209 } else { /* NGX_PROCESS_SINGLE */
210 ngx_reopen = 0;
211 }
212
213 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
214 "reopening logs");
215 ngx_reopen_files(cycle, ccf->user);
216
217 } else if (ngx_change_binary) {
218 ngx_change_binary = 0;
219 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
220 "changing binary");
221 ngx_new_binary = ngx_exec_new_binary(cycle, ctx->argv);
222
223 } else if (ngx_noaccept) {
224 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
225 }
226 }
227
228 if (signo) {
229 for (i = 0; i < ngx_last_process; i++) {
230
231 if (ngx_processes[i].detached) {
232 continue;
233 }
234
235 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
236 "kill (" PID_T_FMT ", %d)" ,
237 ngx_processes[i].pid, signo);
238
239 if (kill(ngx_processes[i].pid, signo) == -1) {
240 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
241 "kill(%d, %d) failed",
242 ngx_processes[i].pid, signo);
243 continue;
244 }
245
246 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
247 ngx_processes[i].exiting = 1;
248 }
249 }
250
251 signo = 0;
252 }
253
254
255
256
257
258
259
260
261
262
263 }
264 }
265
33 266
34 void ngx_master_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx) 267 void ngx_master_process_cycle(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx)
35 { 268 {
36 int signo; 269 int signo;
37 sigset_t set; 270 sigset_t set;
236 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); 469 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
237 470
238 } else if (ngx_timer) { 471 } else if (ngx_timer) {
239 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); 472 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
240 473
241 } else { 474 } else if (ngx_reconfigure) {
242 475 ngx_reconfigure = 0;
243 if (ngx_noaccept) { 476 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
244 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); 477
245 } 478 cycle = ngx_init_cycle(cycle);
246 479 if (cycle == NULL) {
247 if (ngx_change_binary) { 480 cycle = (ngx_cycle_t *) ngx_cycle;
481 continue;
482 }
483
484 ngx_cycle = cycle;
485 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
486
487 } else if (ngx_reopen) {
488 if (ngx_process == NGX_PROCESS_MASTER) {
489 signo = ngx_signal_value(NGX_REOPEN_SIGNAL);
490 ngx_reopen = 0;
491
492 } else { /* NGX_PROCESS_SINGLE */
493 ngx_reopen = 0;
494 }
495
496 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
497 "reopening logs");
498 ngx_reopen_files(cycle, ccf->user);
499
500 } else if (ngx_change_binary) {
248 ngx_change_binary = 0; 501 ngx_change_binary = 0;
249 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, 502 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
250 "changing binary"); 503 "changing binary");
251 ngx_new_binary = ngx_exec_new_binary(cycle, ctx->argv); 504 ngx_new_binary = ngx_exec_new_binary(cycle, ctx->argv);
252 } 505
253 506 } else if (ngx_noaccept) {
254 if (ngx_reconfigure) {
255 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL); 507 signo = ngx_signal_value(NGX_SHUTDOWN_SIGNAL);
256 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
257 "reconfiguring");
258 }
259
260 if (ngx_reopen) {
261 if (ngx_process == NGX_PROCESS_MASTER) {
262 signo = ngx_signal_value(NGX_REOPEN_SIGNAL);
263 ngx_reopen = 0;
264
265 } else { /* NGX_PROCESS_SINGLE */
266 ngx_reopen = 0;
267 }
268
269 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
270 "reopening logs");
271 ngx_reopen_files(cycle, ccf->user);
272 } 508 }
273 } 509 }
274 510
275 if (signo) { 511 if (signo) {
276 for (i = 0; i < ngx_last_process; i++) { 512 for (i = 0; i < ngx_last_process; i++) {
324 ngx_reconfigure = 0; 560 ngx_reconfigure = 0;
325 } 561 }
326 562
327 break; 563 break;
328 } 564 }
565 }
566 }
567
568
569 static void ngx_start_worker_processes(ngx_cycle_y *cycle, ngx_int_t n)
570 {
571 struct itimerval itv;
572
573 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start worker processes");
574
575 while (n--) {
576 ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL,
577 "worker process", NGX_PROCESS_RESPAWN);
578 }
579
580 /*
581 * we have to limit the maximum life time of the worker processes
582 * by 10 days because our millisecond event timer is limited
583 * by 24 days on 32-bit platforms
584 */
585
586 itv.it_interval.tv_sec = 0;
587 itv.it_interval.tv_usec = 0;
588 itv.it_value.tv_sec = 10 * 24 * 60 * 60;
589 itv.it_value.tv_usec = 0;
590
591 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
592 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
593 "setitimer() failed");
329 } 594 }
330 } 595 }
331 596
332 597
333 static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx) 598 static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx)