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Remove dead getrusage replacement code.

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getrusage() is in SUSv2 and all targeted Unix systems have it.

Note that POSIX only covers ru_utime and ru_stime and we rely on many
more fields without any kind of configure probe, but that predates this
commit.

The only supported system we need replacement code for now is Windows,
and that can be done without a configure probe.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Greg Stark <stark@mit.edu>
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Discussion: https://postgr.es/m/CA+hUKGJ3LHeP9w5Fgzdr4G8AnEtJ=z=p6hGDEm4qYGEUX5B6fQ@mail.gmail.com
This commit is contained in:
Thomas Munro
2022-07-24 09:21:57 +12:00
parent b431dc5c3d
commit 86e5eb4f58
7 changed files with 20 additions and 70 deletions
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49
src/port/getrusage.c
View File

@@ -17,19 +17,14 @@
#include "rusagestub.h"
/* This code works on:
* solaris_i386
* solaris_sparc
* win32
* which currently is all the supported platforms that don't have a
* native version of getrusage(). So, if configure decides to compile
* this file at all, we just use this version unconditionally.
/*
* This code works on Windows, which is the only supported platform without a
* native version of getrusage().
*/
int
getrusage(int who, struct rusage *rusage)
{
#ifdef WIN32
FILETIME starttime;
FILETIME exittime;
FILETIME kerneltime;
@@ -66,44 +61,6 @@ getrusage(int who, struct rusage *rusage)
li.QuadPart /= 10L; /* Convert to microseconds */
rusage->ru_utime.tv_sec = li.QuadPart / 1000000L;
rusage->ru_utime.tv_usec = li.QuadPart % 1000000L;
#else /* all but WIN32 */
struct tms tms;
int tick_rate = CLK_TCK; /* ticks per second */
clock_t u,
s;
if (rusage == (struct rusage *) NULL)
{
errno = EFAULT;
return -1;
}
if (times(&tms) < 0)
{
/* errno set by times */
return -1;
}
switch (who)
{
case RUSAGE_SELF:
u = tms.tms_utime;
s = tms.tms_stime;
break;
case RUSAGE_CHILDREN:
u = tms.tms_cutime;
s = tms.tms_cstime;
break;
default:
errno = EINVAL;
return -1;
}
#define TICK_TO_SEC(T, RATE) ((T)/(RATE))
#define TICK_TO_USEC(T,RATE) (((T)%(RATE)*1000000)/RATE)
rusage->ru_utime.tv_sec = TICK_TO_SEC(u, tick_rate);
rusage->ru_utime.tv_usec = TICK_TO_USEC(u, tick_rate);
rusage->ru_stime.tv_sec = TICK_TO_SEC(s, tick_rate);
rusage->ru_stime.tv_usec = TICK_TO_USEC(u, tick_rate);
#endif /* WIN32 */
return 0;
}