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displayed in the postmaster log. This avoids Windows-specific problems with localized time zone names that are in the wrong encoding, and generally seems like a good idea to forestall other potential platform-dependent issues. To preserve the existing behavior that all backends will log in the same time zone, create a new GUC variable log_timezone that can only be changed on a system-wide basis, and reference log-related calculations to that zone instead of the TimeZone variable. This fixes the issue reported by Hiroshi Saito that timestamps printed by xlog.c startup could be improperly localized on Windows. We still need a simpler patch for that problem in the back branches, however.
71 lines
2 KiB
C
71 lines
2 KiB
C
/*-------------------------------------------------------------------------
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*
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* pgtime.h
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* PostgreSQL internal timezone library
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*
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* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/include/pgtime.h,v 1.16 2007/08/04 01:26:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef _PGTIME_H
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#define _PGTIME_H
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/*
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* The API of this library is generally similar to the corresponding
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* C library functions, except that we use pg_time_t which (we hope) is
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* 64 bits wide, and which is most definitely signed not unsigned.
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*/
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typedef int64 pg_time_t;
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struct pg_tm
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{
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int tm_sec;
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int tm_min;
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int tm_hour;
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int tm_mday;
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int tm_mon; /* origin 0, not 1 */
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int tm_year; /* relative to 1900 */
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int tm_wday;
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int tm_yday;
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int tm_isdst;
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long int tm_gmtoff;
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const char *tm_zone;
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};
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typedef struct pg_tz pg_tz;
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typedef struct pg_tzenum pg_tzenum;
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extern struct pg_tm *pg_localtime(const pg_time_t *timep, const pg_tz *tz);
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extern struct pg_tm *pg_gmtime(const pg_time_t *timep);
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extern int pg_next_dst_boundary(const pg_time_t *timep,
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long int *before_gmtoff,
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int *before_isdst,
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pg_time_t *boundary,
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long int *after_gmtoff,
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int *after_isdst,
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const pg_tz *tz);
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extern size_t pg_strftime(char *s, size_t max, const char *format,
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const struct pg_tm * tm);
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extern void pg_timezone_initialize(void);
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extern pg_tz *pg_tzset(const char *tzname);
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extern bool tz_acceptable(pg_tz *tz);
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extern bool pg_get_timezone_offset(const pg_tz *tz, long int *gmtoff);
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extern const char *pg_get_timezone_name(pg_tz *tz);
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extern pg_tzenum *pg_tzenumerate_start(void);
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extern pg_tz *pg_tzenumerate_next(pg_tzenum *dir);
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extern void pg_tzenumerate_end(pg_tzenum *dir);
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extern pg_tz *session_timezone;
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extern pg_tz *log_timezone;
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/* Maximum length of a timezone name (not including trailing null) */
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#define TZ_STRLEN_MAX 255
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#endif /* _PGTIME_H */
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