diff options
Diffstat (limited to 'app/nginx/src/core/ngx_times.c')
| -rw-r--r-- | app/nginx/src/core/ngx_times.c | 428 |
1 files changed, 0 insertions, 428 deletions
diff --git a/app/nginx/src/core/ngx_times.c b/app/nginx/src/core/ngx_times.c deleted file mode 100644 index 843314a..0000000 --- a/app/nginx/src/core/ngx_times.c +++ /dev/null @@ -1,428 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> - - -/* - * The time may be updated by signal handler or by several threads. - * The time update operations are rare and require to hold the ngx_time_lock. - * The time read operations are frequent, so they are lock-free and get time - * values and strings from the current slot. Thus thread may get the corrupted - * values only if it is preempted while copying and then it is not scheduled - * to run more than NGX_TIME_SLOTS seconds. - */ - -#define NGX_TIME_SLOTS 64 - -static ngx_uint_t slot; -static ngx_atomic_t ngx_time_lock; - -volatile ngx_msec_t ngx_current_msec; -volatile ngx_time_t *ngx_cached_time; -volatile ngx_str_t ngx_cached_err_log_time; -volatile ngx_str_t ngx_cached_http_time; -volatile ngx_str_t ngx_cached_http_log_time; -volatile ngx_str_t ngx_cached_http_log_iso8601; -volatile ngx_str_t ngx_cached_syslog_time; - -#if !(NGX_WIN32) - -/* - * localtime() and localtime_r() are not Async-Signal-Safe functions, therefore, - * they must not be called by a signal handler, so we use the cached - * GMT offset value. Fortunately the value is changed only two times a year. - */ - -static ngx_int_t cached_gmtoff; -#endif - -static ngx_time_t cached_time[NGX_TIME_SLOTS]; -static u_char cached_err_log_time[NGX_TIME_SLOTS] - [sizeof("1970/09/28 12:00:00")]; -static u_char cached_http_time[NGX_TIME_SLOTS] - [sizeof("Mon, 28 Sep 1970 06:00:00 GMT")]; -static u_char cached_http_log_time[NGX_TIME_SLOTS] - [sizeof("28/Sep/1970:12:00:00 +0600")]; -static u_char cached_http_log_iso8601[NGX_TIME_SLOTS] - [sizeof("1970-09-28T12:00:00+06:00")]; -static u_char cached_syslog_time[NGX_TIME_SLOTS] - [sizeof("Sep 28 12:00:00")]; - - -static char *week[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; -static char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; - -void -ngx_time_init(void) -{ - ngx_cached_err_log_time.len = sizeof("1970/09/28 12:00:00") - 1; - ngx_cached_http_time.len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1; - ngx_cached_http_log_time.len = sizeof("28/Sep/1970:12:00:00 +0600") - 1; - ngx_cached_http_log_iso8601.len = sizeof("1970-09-28T12:00:00+06:00") - 1; - ngx_cached_syslog_time.len = sizeof("Sep 28 12:00:00") - 1; - - ngx_cached_time = &cached_time[0]; - - ngx_time_update(); -} - - -void -ngx_time_update(void) -{ - u_char *p0, *p1, *p2, *p3, *p4; - ngx_tm_t tm, gmt; - time_t sec; - ngx_uint_t msec; - ngx_time_t *tp; - struct timeval tv; - - if (!ngx_trylock(&ngx_time_lock)) { - return; - } - - ngx_gettimeofday(&tv); - - sec = tv.tv_sec; - msec = tv.tv_usec / 1000; - - ngx_current_msec = (ngx_msec_t) sec * 1000 + msec; - - tp = &cached_time[slot]; - - if (tp->sec == sec) { - tp->msec = msec; - ngx_unlock(&ngx_time_lock); - return; - } - - if (slot == NGX_TIME_SLOTS - 1) { - slot = 0; - } else { - slot++; - } - - tp = &cached_time[slot]; - - tp->sec = sec; - tp->msec = msec; - - ngx_gmtime(sec, &gmt); - - - p0 = &cached_http_time[slot][0]; - - (void) ngx_sprintf(p0, "%s, %02d %s %4d %02d:%02d:%02d GMT", - week[gmt.ngx_tm_wday], gmt.ngx_tm_mday, - months[gmt.ngx_tm_mon - 1], gmt.ngx_tm_year, - gmt.ngx_tm_hour, gmt.ngx_tm_min, gmt.ngx_tm_sec); - -#if (NGX_HAVE_GETTIMEZONE) - - tp->gmtoff = ngx_gettimezone(); - ngx_gmtime(sec + tp->gmtoff * 60, &tm); - -#elif (NGX_HAVE_GMTOFF) - - ngx_localtime(sec, &tm); - cached_gmtoff = (ngx_int_t) (tm.ngx_tm_gmtoff / 60); - tp->gmtoff = cached_gmtoff; - -#else - - ngx_localtime(sec, &tm); - cached_gmtoff = ngx_timezone(tm.ngx_tm_isdst); - tp->gmtoff = cached_gmtoff; - -#endif - - - p1 = &cached_err_log_time[slot][0]; - - (void) ngx_sprintf(p1, "%4d/%02d/%02d %02d:%02d:%02d", - tm.ngx_tm_year, tm.ngx_tm_mon, - tm.ngx_tm_mday, tm.ngx_tm_hour, - tm.ngx_tm_min, tm.ngx_tm_sec); - - - p2 = &cached_http_log_time[slot][0]; - - (void) ngx_sprintf(p2, "%02d/%s/%d:%02d:%02d:%02d %c%02i%02i", - tm.ngx_tm_mday, months[tm.ngx_tm_mon - 1], - tm.ngx_tm_year, tm.ngx_tm_hour, - tm.ngx_tm_min, tm.ngx_tm_sec, - tp->gmtoff < 0 ? '-' : '+', - ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60)); - - p3 = &cached_http_log_iso8601[slot][0]; - - (void) ngx_sprintf(p3, "%4d-%02d-%02dT%02d:%02d:%02d%c%02i:%02i", - tm.ngx_tm_year, tm.ngx_tm_mon, - tm.ngx_tm_mday, tm.ngx_tm_hour, - tm.ngx_tm_min, tm.ngx_tm_sec, - tp->gmtoff < 0 ? '-' : '+', - ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60)); - - p4 = &cached_syslog_time[slot][0]; - - (void) ngx_sprintf(p4, "%s %2d %02d:%02d:%02d", - months[tm.ngx_tm_mon - 1], tm.ngx_tm_mday, - tm.ngx_tm_hour, tm.ngx_tm_min, tm.ngx_tm_sec); - - ngx_memory_barrier(); - - ngx_cached_time = tp; - ngx_cached_http_time.data = p0; - ngx_cached_err_log_time.data = p1; - ngx_cached_http_log_time.data = p2; - ngx_cached_http_log_iso8601.data = p3; - ngx_cached_syslog_time.data = p4; - - ngx_unlock(&ngx_time_lock); -} - - -#if !(NGX_WIN32) - -void -ngx_time_sigsafe_update(void) -{ - u_char *p, *p2; - ngx_tm_t tm; - time_t sec; - ngx_time_t *tp; - struct timeval tv; - - if (!ngx_trylock(&ngx_time_lock)) { - return; - } - - ngx_gettimeofday(&tv); - - sec = tv.tv_sec; - - tp = &cached_time[slot]; - - if (tp->sec == sec) { - ngx_unlock(&ngx_time_lock); - return; - } - - if (slot == NGX_TIME_SLOTS - 1) { - slot = 0; - } else { - slot++; - } - - tp = &cached_time[slot]; - - tp->sec = 0; - - ngx_gmtime(sec + cached_gmtoff * 60, &tm); - - p = &cached_err_log_time[slot][0]; - - (void) ngx_sprintf(p, "%4d/%02d/%02d %02d:%02d:%02d", - tm.ngx_tm_year, tm.ngx_tm_mon, - tm.ngx_tm_mday, tm.ngx_tm_hour, - tm.ngx_tm_min, tm.ngx_tm_sec); - - p2 = &cached_syslog_time[slot][0]; - - (void) ngx_sprintf(p2, "%s %2d %02d:%02d:%02d", - months[tm.ngx_tm_mon - 1], tm.ngx_tm_mday, - tm.ngx_tm_hour, tm.ngx_tm_min, tm.ngx_tm_sec); - - ngx_memory_barrier(); - - ngx_cached_err_log_time.data = p; - ngx_cached_syslog_time.data = p2; - - ngx_unlock(&ngx_time_lock); -} - -#endif - - -u_char * -ngx_http_time(u_char *buf, time_t t) -{ - ngx_tm_t tm; - - ngx_gmtime(t, &tm); - - return ngx_sprintf(buf, "%s, %02d %s %4d %02d:%02d:%02d GMT", - week[tm.ngx_tm_wday], - tm.ngx_tm_mday, - months[tm.ngx_tm_mon - 1], - tm.ngx_tm_year, - tm.ngx_tm_hour, - tm.ngx_tm_min, - tm.ngx_tm_sec); -} - - -u_char * -ngx_http_cookie_time(u_char *buf, time_t t) -{ - ngx_tm_t tm; - - ngx_gmtime(t, &tm); - - /* - * Netscape 3.x does not understand 4-digit years at all and - * 2-digit years more than "37" - */ - - return ngx_sprintf(buf, - (tm.ngx_tm_year > 2037) ? - "%s, %02d-%s-%d %02d:%02d:%02d GMT": - "%s, %02d-%s-%02d %02d:%02d:%02d GMT", - week[tm.ngx_tm_wday], - tm.ngx_tm_mday, - months[tm.ngx_tm_mon - 1], - (tm.ngx_tm_year > 2037) ? tm.ngx_tm_year: - tm.ngx_tm_year % 100, - tm.ngx_tm_hour, - tm.ngx_tm_min, - tm.ngx_tm_sec); -} - - -void -ngx_gmtime(time_t t, ngx_tm_t *tp) -{ - ngx_int_t yday; - ngx_uint_t n, sec, min, hour, mday, mon, year, wday, days, leap; - - /* the calculation is valid for positive time_t only */ - - n = (ngx_uint_t) t; - - days = n / 86400; - - /* January 1, 1970 was Thursday */ - - wday = (4 + days) % 7; - - n %= 86400; - hour = n / 3600; - n %= 3600; - min = n / 60; - sec = n % 60; - - /* - * the algorithm based on Gauss' formula, - * see src/http/ngx_http_parse_time.c - */ - - /* days since March 1, 1 BC */ - days = days - (31 + 28) + 719527; - - /* - * The "days" should be adjusted to 1 only, however, some March 1st's go - * to previous year, so we adjust them to 2. This causes also shift of the - * last February days to next year, but we catch the case when "yday" - * becomes negative. - */ - - year = (days + 2) * 400 / (365 * 400 + 100 - 4 + 1); - - yday = days - (365 * year + year / 4 - year / 100 + year / 400); - - if (yday < 0) { - leap = (year % 4 == 0) && (year % 100 || (year % 400 == 0)); - yday = 365 + leap + yday; - year--; - } - - /* - * The empirical formula that maps "yday" to month. - * There are at least 10 variants, some of them are: - * mon = (yday + 31) * 15 / 459 - * mon = (yday + 31) * 17 / 520 - * mon = (yday + 31) * 20 / 612 - */ - - mon = (yday + 31) * 10 / 306; - - /* the Gauss' formula that evaluates days before the month */ - - mday = yday - (367 * mon / 12 - 30) + 1; - - if (yday >= 306) { - - year++; - mon -= 10; - - /* - * there is no "yday" in Win32 SYSTEMTIME - * - * yday -= 306; - */ - - } else { - - mon += 2; - - /* - * there is no "yday" in Win32 SYSTEMTIME - * - * yday += 31 + 28 + leap; - */ - } - - tp->ngx_tm_sec = (ngx_tm_sec_t) sec; - tp->ngx_tm_min = (ngx_tm_min_t) min; - tp->ngx_tm_hour = (ngx_tm_hour_t) hour; - tp->ngx_tm_mday = (ngx_tm_mday_t) mday; - tp->ngx_tm_mon = (ngx_tm_mon_t) mon; - tp->ngx_tm_year = (ngx_tm_year_t) year; - tp->ngx_tm_wday = (ngx_tm_wday_t) wday; -} - - -time_t -ngx_next_time(time_t when) -{ - time_t now, next; - struct tm tm; - - now = ngx_time(); - - ngx_libc_localtime(now, &tm); - - tm.tm_hour = (int) (when / 3600); - when %= 3600; - tm.tm_min = (int) (when / 60); - tm.tm_sec = (int) (when % 60); - - next = mktime(&tm); - - if (next == -1) { - return -1; - } - - if (next - now > 0) { - return next; - } - - tm.tm_mday++; - - /* mktime() should normalize a date (Jan 32, etc) */ - - next = mktime(&tm); - - if (next != -1) { - return next; - } - - return -1; -} |