| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| |
| |
| ngx_epoch_msec_t ngx_elapsed_msec; |
| ngx_epoch_msec_t ngx_old_elapsed_msec; |
| ngx_epoch_msec_t ngx_start_msec; |
| |
| static ngx_tm_t ngx_cached_gmtime; |
| static ngx_int_t ngx_gmtoff; |
| |
| |
| /* |
| * In the threaded mode only one thread updates the cached time and strings |
| * and these operations are protected by the mutex. The reading of the cached |
| * time and strings is not protected by the mutex. To avoid the race |
| * conditions for non-atomic values we use the NGX_TIME_SLOTS slots to store |
| * time value and strings. 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. |
| */ |
| |
| #if (NGX_THREADS) |
| |
| #define NGX_TIME_SLOTS 60 |
| static ngx_uint_t slot = NGX_TIME_SLOTS; |
| |
| static ngx_mutex_t *ngx_time_mutex; |
| |
| #else |
| |
| #define NGX_TIME_SLOTS 1 |
| #define slot 0 |
| |
| #endif |
| |
| |
| #if (NGX_THREADS && (TIME_T_SIZE > SIG_ATOMIC_T_SIZE)) |
| |
| volatile time_t *ngx_cached_time; |
| static time_t cached_time[NGX_TIME_SLOTS]; |
| |
| #else |
| |
| volatile time_t ngx_cached_time; |
| |
| #endif |
| |
| |
| ngx_thread_volatile ngx_str_t ngx_cached_err_log_time; |
| ngx_thread_volatile ngx_str_t ngx_cached_http_time; |
| ngx_thread_volatile ngx_str_t ngx_cached_http_log_time; |
| |
| |
| 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 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() |
| { |
| struct timeval tv; |
| |
| ngx_memzero(&ngx_cached_gmtime, sizeof(ngx_tm_t)); |
| #ifdef ngx_tm_zone |
| ngx_cached_gmtime.ngx_tm_zone = "GMT"; |
| #endif |
| |
| 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; |
| |
| #if (NGX_THREADS && (TIME_T_SIZE > SIG_ATOMIC_T_SIZE)) |
| ngx_cached_time = &cached_time[0]; |
| #endif |
| |
| ngx_gettimeofday(&tv); |
| |
| ngx_start_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000 + tv.tv_usec / 1000; |
| ngx_old_elapsed_msec = 0; |
| ngx_elapsed_msec = 0; |
| |
| #if !(NGX_WIN32) |
| tzset(); |
| #endif |
| |
| ngx_time_update(tv.tv_sec); |
| } |
| |
| |
| #if (NGX_THREADS) |
| |
| ngx_int_t ngx_time_mutex_init(ngx_log_t *log) |
| { |
| if (!(ngx_time_mutex = ngx_mutex_init(log, NGX_MUTEX_LIGHT))) { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| |
| void ngx_time_update(time_t s) |
| { |
| u_char *p; |
| ngx_tm_t tm; |
| |
| if (ngx_time() == s) { |
| return; |
| } |
| |
| #if (NGX_THREADS) |
| |
| if (ngx_mutex_trylock(ngx_time_mutex) != NGX_OK) { |
| return; |
| } |
| |
| if (slot == NGX_TIME_SLOTS) { |
| slot = 0; |
| } else { |
| slot++; |
| } |
| |
| #if (NGX_THREADS && (TIME_T_SIZE > SIG_ATOMIC_T_SIZE)) |
| ngx_cached_time = &cached_time[slot]; |
| #endif |
| |
| #endif |
| |
| ngx_time() = s; |
| |
| ngx_gmtime(s, &ngx_cached_gmtime); |
| |
| |
| p = cached_http_time[slot]; |
| |
| ngx_sprintf(p, "%s, %02d %s %4d %02d:%02d:%02d GMT", |
| week[ngx_cached_gmtime.ngx_tm_wday], |
| ngx_cached_gmtime.ngx_tm_mday, |
| months[ngx_cached_gmtime.ngx_tm_mon - 1], |
| ngx_cached_gmtime.ngx_tm_year, |
| ngx_cached_gmtime.ngx_tm_hour, |
| ngx_cached_gmtime.ngx_tm_min, |
| ngx_cached_gmtime.ngx_tm_sec); |
| |
| ngx_cached_http_time.data = p; |
| |
| |
| #if (NGX_HAVE_GETTIMEZONE) |
| |
| ngx_gmtoff = ngx_gettimezone(); |
| ngx_gmtime(s + ngx_gmtoff * 60, &tm); |
| |
| #elif (NGX_HAVE_GMTOFF) |
| |
| ngx_localtime(&tm); |
| ngx_gmtoff = tm.ngx_tm_gmtoff / 60; |
| |
| #else |
| |
| ngx_localtime(&tm); |
| ngx_gmtoff = ngx_timezone(tm.ngx_tm_isdst); |
| |
| #endif |
| |
| |
| p = cached_err_log_time[slot]; |
| |
| 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); |
| |
| ngx_cached_err_log_time.data = p; |
| |
| |
| p = cached_http_log_time[slot]; |
| |
| ngx_sprintf(p, "%02d/%s/%d:%02d:%02d:%02d %c%02d%02d", |
| 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, |
| ngx_gmtoff < 0 ? '-' : '+', |
| abs(ngx_gmtoff / 60), abs(ngx_gmtoff % 60)); |
| |
| ngx_cached_http_log_time.data = p; |
| |
| |
| #if (NGX_THREADS) |
| ngx_mutex_unlock(ngx_time_mutex); |
| #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 sec, min, hour, mday, mon, year, wday, yday, days; |
| |
| days = t / 86400; |
| |
| /* Jaunary 1, 1970 was Thursday */ |
| wday = (4 + days) % 7; |
| |
| t %= 86400; |
| hour = t / 3600; |
| t %= 3600; |
| min = t / 60; |
| sec = t % 60; |
| |
| /* the algorithm based on Gauss's formula */ |
| |
| days = days - (31 + 28) + 719527; |
| |
| year = days * 400 / (365 * 400 + 100 - 4 + 1); |
| yday = days - (365 * year + year / 4 - year / 100 + year / 400); |
| |
| mon = (yday + 31) * 12 / 367; |
| mday = yday - (mon * 367 / 12 - 31); |
| |
| mon += 2; |
| |
| if (yday >= 306) { |
| |
| /* |
| * there is no "yday" in Win32 SYSTEMTIME |
| * |
| * yday -= 306; |
| */ |
| |
| year++; |
| mon -= 12; |
| |
| if (mday == 0) { |
| /* Jaunary 31 */ |
| mon = 1; |
| mday = 31; |
| |
| } else if (mon == 2) { |
| |
| if ((year % 4 == 0) && (year % 100 || (year % 400 == 0))) { |
| if (mday > 29) { |
| mon = 3; |
| mday -= 29; |
| } |
| |
| } else if (mday > 28) { |
| mon = 3; |
| mday -= 28; |
| } |
| } |
| |
| /* |
| * there is no "yday" in Win32 SYSTEMTIME |
| * |
| * } else { |
| * yday += 31 + 28; |
| * |
| * if ((year % 4 == 0) && (year % 100 || (year % 400 == 0))) { |
| * yday++; |
| * } |
| */ |
| } |
| |
| 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; |
| } |
