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Allow \timing in psql to have a better resolution than ~15ms on Windows.

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ITAGAKI Takahiro
This commit is contained in:
Magnus Hagander 2007-04-13 20:40:59 +00:00
parent 5b464e1196
commit bf3b8d8ad8
1 changed files with 17 additions and 12 deletions
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29
src/bin/psql/common.h
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@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2007, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/common.h,v 1.54 2007/01/05 22:19:49 momjian Exp $
* $PostgreSQL: pgsql/src/bin/psql/common.h,v 1.55 2007/04/13 20:40:59 mha Exp $
*/
#ifndef COMMON_H
#define COMMON_H
@ -63,10 +63,6 @@ extern const char *session_username(void);
extern char *expand_tilde(char **filename);
/* Workarounds for Windows */
/* Probably to be moved up the source tree in the future, perhaps to be replaced by
* more specific checks like configure-style HAVE_GETTIMEOFDAY macros.
*/
#ifndef WIN32
#include <sys/time.h>
@ -78,16 +74,25 @@ typedef struct timeval TimevalStruct;
((((int) ((T)->tv_sec - (U)->tv_sec)) * 1000000.0 + \
((int) ((T)->tv_usec - (U)->tv_usec))) / 1000.0)
#else
/*
* To get good resolution (better than ~15ms) on Windows, use
* the high resolution performance counters. They can't be used
* to get absolute times, but are good for measuring differences.
*/
static __inline__ double
GetTimerFrequency(void)
{
LARGE_INTEGER f;
#include <sys/types.h>
#include <sys/timeb.h>
QueryPerformanceFrequency(&f);
return (double) f.QuadPart;
}
typedef struct _timeb TimevalStruct;
typedef LARGE_INTEGER TimevalStruct;
#define GETTIMEOFDAY(T) _ftime(T)
#define GETTIMEOFDAY(T) QueryPerformanceCounter((T))
#define DIFF_MSEC(T, U) \
(((T)->time - (U)->time) * 1000.0 + \
((T)->millitm - (U)->millitm))
#endif
(((T)->QuadPart - (U)->QuadPart) * 1000.0 / GetTimerFrequency())
#endif /* WIN32 */
#endif /* COMMON_H */