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Replace time_t with pg_time_t (same values, but always int64) in on-disk

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data structures and backend internal APIs.  This solves problems we've seen
recently with inconsistent layout of pg_control between machines that have
32-bit time_t and those that have already migrated to 64-bit time_t.  Also,
we can get out from under the problem that Windows' Unix-API emulation is not
consistent about the width of time_t.

There are a few remaining places where local time_t variables are used to hold
the current or recent result of time(NULL).  I didn't bother changing these
since they do not affect any cross-module APIs and surely all platforms will
have 64-bit time_t before overflow becomes an actual risk.  time_t should
be avoided for anything visible to extension modules, however.
This commit is contained in:
Tom Lane
2008-02-17 02:09:32 +00:00
parent ee7a6770f6
commit cd00406774
17 changed files with 98 additions and 91 deletions
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6
src/include/utils/timestamp.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.74 2008/01/23 21:26:13 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.75 2008/02/17 02:09:31 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -310,8 +310,8 @@ extern bool TimestampDifferenceExceeds(TimestampTz start_time,
TimestampTz stop_time,
int msec);
extern TimestampTz time_t_to_timestamptz(time_t tm);
extern time_t timestamptz_to_time_t(TimestampTz t);
extern TimestampTz time_t_to_timestamptz(pg_time_t tm);
extern pg_time_t timestamptz_to_time_t(TimestampTz t);
extern const char *timestamptz_to_str(TimestampTz t);