|
0
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
|
4 */
|
|
|
5
|
|
|
6
|
|
|
7 #include <ngx_config.h>
|
|
|
8 #include <ngx_core.h>
|
|
|
9
|
|
|
10
|
|
|
11 /*
|
|
112
|
12 * The time may be updated by signal handler or by several threads.
|
|
|
13 * The time update operations are rare and require to hold the ngx_time_lock.
|
|
|
14 * The time read operations are frequent, so they are lock-free and get time
|
|
|
15 * values and strings from the current slot. Thus thread may get the corrupted
|
|
|
16 * values only if it is preempted while copying and then it is not scheduled
|
|
|
17 * to run more than NGX_TIME_SLOTS seconds.
|
|
0
|
18 */
|
|
|
19
|
|
112
|
20 #define NGX_TIME_SLOTS 64
|
|
0
|
21
|
|
270
|
22 static ngx_uint_t slot;
|
|
112
|
23 static ngx_atomic_t ngx_time_lock;
|
|
0
|
24
|
|
112
|
25 volatile ngx_msec_t ngx_current_msec;
|
|
|
26 volatile ngx_time_t *ngx_cached_time;
|
|
|
27 volatile ngx_str_t ngx_cached_err_log_time;
|
|
|
28 volatile ngx_str_t ngx_cached_http_time;
|
|
|
29 volatile ngx_str_t ngx_cached_http_log_time;
|
|
616
|
30 volatile ngx_str_t ngx_cached_http_log_iso8601;
|
|
0
|
31
|
|
566
|
32 #if !(NGX_WIN32)
|
|
|
33
|
|
|
34 /*
|
|
|
35 * locatime() and localtime_r() are not Async-Signal-Safe functions, therefore,
|
|
|
36 * they must not be called by a signal handler, so we use the cached
|
|
|
37 * GMT offset value. Fortunately the value is changed only two times a year.
|
|
|
38 */
|
|
|
39
|
|
|
40 static ngx_int_t cached_gmtoff;
|
|
|
41 #endif
|
|
|
42
|
|
112
|
43 static ngx_time_t cached_time[NGX_TIME_SLOTS];
|
|
|
44 static u_char cached_err_log_time[NGX_TIME_SLOTS]
|
|
|
45 [sizeof("1970/09/28 12:00:00")];
|
|
|
46 static u_char cached_http_time[NGX_TIME_SLOTS]
|
|
|
47 [sizeof("Mon, 28 Sep 1970 06:00:00 GMT")];
|
|
|
48 static u_char cached_http_log_time[NGX_TIME_SLOTS]
|
|
|
49 [sizeof("28/Sep/1970:12:00:00 +0600")];
|
|
616
|
50 static u_char cached_http_log_iso8601[NGX_TIME_SLOTS]
|
|
|
51 [sizeof("1970-09-28T12:00:00+06:00")];
|
|
0
|
52
|
|
|
53
|
|
|
54 static char *week[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
|
|
|
55 static char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
|
|
56 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
|
|
|
57
|
|
50
|
58 void
|
|
|
59 ngx_time_init(void)
|
|
0
|
60 {
|
|
|
61 ngx_cached_err_log_time.len = sizeof("1970/09/28 12:00:00") - 1;
|
|
|
62 ngx_cached_http_time.len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1;
|
|
|
63 ngx_cached_http_log_time.len = sizeof("28/Sep/1970:12:00:00 +0600") - 1;
|
|
616
|
64 ngx_cached_http_log_iso8601.len = sizeof("1970-09-28T12:00:00+06:00") - 1;
|
|
0
|
65
|
|
|
66 ngx_cached_time = &cached_time[0];
|
|
|
67
|
|
566
|
68 ngx_time_update();
|
|
0
|
69 }
|
|
|
70
|
|
|
71
|
|
112
|
72 void
|
|
566
|
73 ngx_time_update(void)
|
|
0
|
74 {
|
|
616
|
75 u_char *p0, *p1, *p2, *p3;
|
|
112
|
76 ngx_tm_t tm, gmt;
|
|
566
|
77 time_t sec;
|
|
|
78 ngx_uint_t msec;
|
|
112
|
79 ngx_time_t *tp;
|
|
|
80 struct timeval tv;
|
|
0
|
81
|
|
112
|
82 if (!ngx_trylock(&ngx_time_lock)) {
|
|
0
|
83 return;
|
|
|
84 }
|
|
|
85
|
|
566
|
86 ngx_gettimeofday(&tv);
|
|
112
|
87
|
|
566
|
88 sec = tv.tv_sec;
|
|
|
89 msec = tv.tv_usec / 1000;
|
|
112
|
90
|
|
|
91 ngx_current_msec = (ngx_msec_t) sec * 1000 + msec;
|
|
|
92
|
|
|
93 tp = &cached_time[slot];
|
|
0
|
94
|
|
112
|
95 if (tp->sec == sec) {
|
|
262
|
96 tp->msec = msec;
|
|
112
|
97 ngx_unlock(&ngx_time_lock);
|
|
|
98 return;
|
|
|
99 }
|
|
0
|
100
|
|
282
|
101 if (slot == NGX_TIME_SLOTS - 1) {
|
|
262
|
102 slot = 0;
|
|
|
103 } else {
|
|
|
104 slot++;
|
|
|
105 }
|
|
|
106
|
|
|
107 tp = &cached_time[slot];
|
|
|
108
|
|
112
|
109 tp->sec = sec;
|
|
262
|
110 tp->msec = msec;
|
|
112
|
111
|
|
|
112 ngx_gmtime(sec, &gmt);
|
|
0
|
113
|
|
|
114
|
|
280
|
115 p0 = &cached_http_time[slot][0];
|
|
0
|
116
|
|
112
|
117 (void) ngx_sprintf(p0, "%s, %02d %s %4d %02d:%02d:%02d GMT",
|
|
|
118 week[gmt.ngx_tm_wday], gmt.ngx_tm_mday,
|
|
|
119 months[gmt.ngx_tm_mon - 1], gmt.ngx_tm_year,
|
|
|
120 gmt.ngx_tm_hour, gmt.ngx_tm_min, gmt.ngx_tm_sec);
|
|
0
|
121
|
|
18
|
122 #if (NGX_HAVE_GETTIMEZONE)
|
|
0
|
123
|
|
112
|
124 tp->gmtoff = ngx_gettimezone();
|
|
|
125 ngx_gmtime(sec + tp->gmtoff * 60, &tm);
|
|
0
|
126
|
|
18
|
127 #elif (NGX_HAVE_GMTOFF)
|
|
0
|
128
|
|
112
|
129 ngx_localtime(sec, &tm);
|
|
566
|
130 cached_gmtoff = (ngx_int_t) (tm.ngx_tm_gmtoff / 60);
|
|
|
131 tp->gmtoff = cached_gmtoff;
|
|
0
|
132
|
|
|
133 #else
|
|
|
134
|
|
112
|
135 ngx_localtime(sec, &tm);
|
|
566
|
136 cached_gmtoff = ngx_timezone(tm.ngx_tm_isdst);
|
|
|
137 tp->gmtoff = cached_gmtoff;
|
|
0
|
138
|
|
|
139 #endif
|
|
|
140
|
|
|
141
|
|
280
|
142 p1 = &cached_err_log_time[slot][0];
|
|
0
|
143
|
|
112
|
144 (void) ngx_sprintf(p1, "%4d/%02d/%02d %02d:%02d:%02d",
|
|
66
|
145 tm.ngx_tm_year, tm.ngx_tm_mon,
|
|
|
146 tm.ngx_tm_mday, tm.ngx_tm_hour,
|
|
|
147 tm.ngx_tm_min, tm.ngx_tm_sec);
|
|
0
|
148
|
|
|
149
|
|
280
|
150 p2 = &cached_http_log_time[slot][0];
|
|
0
|
151
|
|
112
|
152 (void) ngx_sprintf(p2, "%02d/%s/%d:%02d:%02d:%02d %c%02d%02d",
|
|
66
|
153 tm.ngx_tm_mday, months[tm.ngx_tm_mon - 1],
|
|
|
154 tm.ngx_tm_year, tm.ngx_tm_hour,
|
|
|
155 tm.ngx_tm_min, tm.ngx_tm_sec,
|
|
112
|
156 tp->gmtoff < 0 ? '-' : '+',
|
|
|
157 ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60));
|
|
0
|
158
|
|
616
|
159 p3 = &cached_http_log_iso8601[slot][0];
|
|
|
160
|
|
|
161 (void) ngx_sprintf(p3, "%4d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
|
|
|
162 tm.ngx_tm_year, tm.ngx_tm_mon,
|
|
|
163 tm.ngx_tm_mday, tm.ngx_tm_hour,
|
|
|
164 tm.ngx_tm_min, tm.ngx_tm_sec,
|
|
|
165 tp->gmtoff < 0 ? '-' : '+',
|
|
|
166 ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60));
|
|
|
167
|
|
0
|
168
|
|
112
|
169 ngx_memory_barrier();
|
|
0
|
170
|
|
112
|
171 ngx_cached_time = tp;
|
|
|
172 ngx_cached_http_time.data = p0;
|
|
|
173 ngx_cached_err_log_time.data = p1;
|
|
|
174 ngx_cached_http_log_time.data = p2;
|
|
616
|
175 ngx_cached_http_log_iso8601.data = p3;
|
|
112
|
176
|
|
|
177 ngx_unlock(&ngx_time_lock);
|
|
0
|
178 }
|
|
|
179
|
|
|
180
|
|
566
|
181 #if !(NGX_WIN32)
|
|
|
182
|
|
|
183 void
|
|
|
184 ngx_time_sigsafe_update(void)
|
|
|
185 {
|
|
|
186 u_char *p;
|
|
|
187 ngx_tm_t tm;
|
|
|
188 time_t sec;
|
|
|
189 ngx_time_t *tp;
|
|
|
190 struct timeval tv;
|
|
|
191
|
|
|
192 if (!ngx_trylock(&ngx_time_lock)) {
|
|
|
193 return;
|
|
|
194 }
|
|
|
195
|
|
|
196 ngx_gettimeofday(&tv);
|
|
|
197
|
|
|
198 sec = tv.tv_sec;
|
|
|
199
|
|
|
200 tp = &cached_time[slot];
|
|
|
201
|
|
|
202 if (tp->sec == sec) {
|
|
|
203 ngx_unlock(&ngx_time_lock);
|
|
|
204 return;
|
|
|
205 }
|
|
|
206
|
|
|
207 if (slot == NGX_TIME_SLOTS - 1) {
|
|
|
208 slot = 0;
|
|
|
209 } else {
|
|
|
210 slot++;
|
|
|
211 }
|
|
|
212
|
|
|
213 ngx_gmtime(sec + cached_gmtoff * 60, &tm);
|
|
|
214
|
|
|
215 p = &cached_err_log_time[slot][0];
|
|
|
216
|
|
|
217 (void) ngx_sprintf(p, "%4d/%02d/%02d %02d:%02d:%02d",
|
|
|
218 tm.ngx_tm_year, tm.ngx_tm_mon,
|
|
|
219 tm.ngx_tm_mday, tm.ngx_tm_hour,
|
|
|
220 tm.ngx_tm_min, tm.ngx_tm_sec);
|
|
|
221
|
|
|
222 ngx_memory_barrier();
|
|
|
223
|
|
|
224 ngx_cached_err_log_time.data = p;
|
|
|
225
|
|
|
226 ngx_unlock(&ngx_time_lock);
|
|
|
227 }
|
|
|
228
|
|
|
229 #endif
|
|
|
230
|
|
|
231
|
|
50
|
232 u_char *
|
|
|
233 ngx_http_time(u_char *buf, time_t t)
|
|
0
|
234 {
|
|
|
235 ngx_tm_t tm;
|
|
|
236
|
|
|
237 ngx_gmtime(t, &tm);
|
|
|
238
|
|
4
|
239 return ngx_sprintf(buf, "%s, %02d %s %4d %02d:%02d:%02d GMT",
|
|
|
240 week[tm.ngx_tm_wday],
|
|
|
241 tm.ngx_tm_mday,
|
|
|
242 months[tm.ngx_tm_mon - 1],
|
|
|
243 tm.ngx_tm_year,
|
|
|
244 tm.ngx_tm_hour,
|
|
|
245 tm.ngx_tm_min,
|
|
|
246 tm.ngx_tm_sec);
|
|
0
|
247 }
|
|
|
248
|
|
|
249
|
|
50
|
250 u_char *
|
|
|
251 ngx_http_cookie_time(u_char *buf, time_t t)
|
|
0
|
252 {
|
|
|
253 ngx_tm_t tm;
|
|
|
254
|
|
|
255 ngx_gmtime(t, &tm);
|
|
|
256
|
|
|
257 /*
|
|
|
258 * Netscape 3.x does not understand 4-digit years at all and
|
|
|
259 * 2-digit years more than "37"
|
|
|
260 */
|
|
|
261
|
|
4
|
262 return ngx_sprintf(buf,
|
|
|
263 (tm.ngx_tm_year > 2037) ?
|
|
|
264 "%s, %02d-%s-%d %02d:%02d:%02d GMT":
|
|
|
265 "%s, %02d-%s-%02d %02d:%02d:%02d GMT",
|
|
|
266 week[tm.ngx_tm_wday],
|
|
|
267 tm.ngx_tm_mday,
|
|
|
268 months[tm.ngx_tm_mon - 1],
|
|
|
269 (tm.ngx_tm_year > 2037) ? tm.ngx_tm_year:
|
|
|
270 tm.ngx_tm_year % 100,
|
|
|
271 tm.ngx_tm_hour,
|
|
|
272 tm.ngx_tm_min,
|
|
|
273 tm.ngx_tm_sec);
|
|
0
|
274 }
|
|
|
275
|
|
|
276
|
|
50
|
277 void
|
|
|
278 ngx_gmtime(time_t t, ngx_tm_t *tp)
|
|
0
|
279 {
|
|
372
|
280 ngx_int_t yday;
|
|
|
281 ngx_uint_t n, sec, min, hour, mday, mon, year, wday, days, leap;
|
|
0
|
282
|
|
364
|
283 /* the calculation is valid for positive time_t only */
|
|
372
|
284
|
|
364
|
285 n = (ngx_uint_t) t;
|
|
|
286
|
|
|
287 days = n / 86400;
|
|
0
|
288
|
|
|
289 /* Jaunary 1, 1970 was Thursday */
|
|
372
|
290
|
|
0
|
291 wday = (4 + days) % 7;
|
|
|
292
|
|
364
|
293 n %= 86400;
|
|
|
294 hour = n / 3600;
|
|
|
295 n %= 3600;
|
|
|
296 min = n / 60;
|
|
|
297 sec = n % 60;
|
|
0
|
298
|
|
372
|
299 /*
|
|
|
300 * the algorithm based on Gauss' formula,
|
|
|
301 * see src/http/ngx_http_parse_time.c
|
|
|
302 */
|
|
0
|
303
|
|
372
|
304 /* days since March 1, 1 BC */
|
|
0
|
305 days = days - (31 + 28) + 719527;
|
|
|
306
|
|
372
|
307 /*
|
|
|
308 * The "days" should be adjusted to 1 only, however, some March 1st's go
|
|
|
309 * to previous year, so we adjust them to 2. This causes also shift of the
|
|
|
310 * last Feburary days to next year, but we catch the case when "yday"
|
|
|
311 * becomes negative.
|
|
|
312 */
|
|
|
313
|
|
|
314 year = (days + 2) * 400 / (365 * 400 + 100 - 4 + 1);
|
|
|
315
|
|
0
|
316 yday = days - (365 * year + year / 4 - year / 100 + year / 400);
|
|
|
317
|
|
372
|
318 if (yday < 0) {
|
|
|
319 leap = (year % 4 == 0) && (year % 100 || (year % 400 == 0));
|
|
|
320 yday = 365 + leap + yday;
|
|
|
321 year--;
|
|
|
322 }
|
|
0
|
323
|
|
372
|
324 /*
|
|
|
325 * The empirical formula that maps "yday" to month.
|
|
|
326 * There are at least 10 variants, some of them are:
|
|
|
327 * mon = (yday + 31) * 15 / 459
|
|
|
328 * mon = (yday + 31) * 17 / 520
|
|
|
329 * mon = (yday + 31) * 20 / 612
|
|
|
330 */
|
|
|
331
|
|
|
332 mon = (yday + 31) * 10 / 306;
|
|
|
333
|
|
|
334 /* the Gauss' formula that evaluates days before the month */
|
|
|
335
|
|
|
336 mday = yday - (367 * mon / 12 - 30) + 1;
|
|
0
|
337
|
|
|
338 if (yday >= 306) {
|
|
|
339
|
|
372
|
340 year++;
|
|
|
341 mon -= 10;
|
|
|
342
|
|
0
|
343 /*
|
|
|
344 * there is no "yday" in Win32 SYSTEMTIME
|
|
|
345 *
|
|
|
346 * yday -= 306;
|
|
|
347 */
|
|
|
348
|
|
372
|
349 } else {
|
|
0
|
350
|
|
372
|
351 mon += 2;
|
|
0
|
352
|
|
372
|
353 /*
|
|
|
354 * there is no "yday" in Win32 SYSTEMTIME
|
|
|
355 *
|
|
|
356 * yday += 31 + 28 + leap;
|
|
|
357 */
|
|
0
|
358 }
|
|
|
359
|
|
|
360 tp->ngx_tm_sec = (ngx_tm_sec_t) sec;
|
|
|
361 tp->ngx_tm_min = (ngx_tm_min_t) min;
|
|
|
362 tp->ngx_tm_hour = (ngx_tm_hour_t) hour;
|
|
|
363 tp->ngx_tm_mday = (ngx_tm_mday_t) mday;
|
|
|
364 tp->ngx_tm_mon = (ngx_tm_mon_t) mon;
|
|
|
365 tp->ngx_tm_year = (ngx_tm_year_t) year;
|
|
|
366 tp->ngx_tm_wday = (ngx_tm_wday_t) wday;
|
|
|
367 }
|
|
394
|
368
|
|
|
369
|
|
|
370 time_t
|
|
|
371 ngx_next_time(time_t when)
|
|
|
372 {
|
|
|
373 time_t now, next;
|
|
|
374 struct tm tm;
|
|
|
375
|
|
|
376 now = ngx_time();
|
|
|
377
|
|
|
378 ngx_libc_localtime(now, &tm);
|
|
|
379
|
|
|
380 tm.tm_hour = (int) (when / 3600);
|
|
|
381 when %= 3600;
|
|
|
382 tm.tm_min = (int) (when / 60);
|
|
|
383 tm.tm_sec = (int) (when % 60);
|
|
|
384
|
|
|
385 next = mktime(&tm);
|
|
|
386
|
|
|
387 if (next == -1) {
|
|
|
388 return -1;
|
|
|
389 }
|
|
|
390
|
|
|
391 if (next - now > 0) {
|
|
|
392 return next;
|
|
|
393 }
|
|
|
394
|
|
|
395 tm.tm_mday++;
|
|
|
396
|
|
|
397 /* mktime() should normalize a date (Jan 32, etc) */
|
|
|
398
|
|
|
399 next = mktime(&tm);
|
|
|
400
|
|
|
401 if (next != -1) {
|
|
|
402 return next;
|
|
|
403 }
|
|
|
404
|
|
|
405 return -1;
|
|
|
406 }
|
