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06e1d62689
The first rule of portability for us is 'thou shalt have no other gods before c.h', and a whole lot of these files were either not including c.h at all, or including random system headers beforehand, either of which sins can mess up largefile support nicely. Once you have included c.h, there is no need to re-include what it includes, either.
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* getrusage.c
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* get information about resource utilisation
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/port/getrusage.c,v 1.10 2005/07/28 04:03:14 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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#include "rusagestub.h"
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/* This code works on:
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* univel
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* solaris_i386
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* sco
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* solaris_sparc
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* svr4
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* hpux 9.*
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* win32
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* which currently is all the supported platforms that don't have a
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* native version of getrusage(). So, if configure decides to compile
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* this file at all, we just use this version unconditionally.
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*/
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int
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getrusage(int who, struct rusage * rusage)
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{
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#ifdef WIN32
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FILETIME starttime;
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FILETIME exittime;
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FILETIME kerneltime;
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FILETIME usertime;
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ULARGE_INTEGER li;
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if (rusage == (struct rusage *)NULL)
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{
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errno = EFAULT;
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return -1;
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}
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memset(rusage, 0, sizeof(struct rusage));
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if (GetProcessTimes(GetCurrentProcess(),
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&starttime, &exittime, &kerneltime, &usertime) == 0)
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{
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_dosmaperr(GetLastError());
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return -1;
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}
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/* Convert FILETIMEs (0.1 us) to struct timeval */
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memcpy(&li, &kerneltime, sizeof(FILETIME));
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li.QuadPart /= 10L; /* Convert to microseconds */
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rusage->ru_stime.tv_sec = li.QuadPart / 1000000L;
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rusage->ru_stime.tv_usec = li.QuadPart % 1000000L;
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memcpy(&li, &usertime, sizeof(FILETIME));
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li.QuadPart /= 10L; /* Convert to microseconds */
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rusage->ru_utime.tv_sec = li.QuadPart / 1000000L;
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rusage->ru_utime.tv_usec = li.QuadPart % 1000000L;
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#else /* all but WIN32 */
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struct tms tms;
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int tick_rate = CLK_TCK; /* ticks per second */
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clock_t u,
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s;
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if (rusage == (struct rusage *) NULL)
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{
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errno = EFAULT;
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return -1;
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}
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if (times(&tms) < 0)
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{
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/* errno set by times */
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return -1;
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}
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switch (who)
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{
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case RUSAGE_SELF:
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u = tms.tms_utime;
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s = tms.tms_stime;
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break;
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case RUSAGE_CHILDREN:
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u = tms.tms_cutime;
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s = tms.tms_cstime;
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break;
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default:
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errno = EINVAL;
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return -1;
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}
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#define TICK_TO_SEC(T, RATE) ((T)/(RATE))
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#define TICK_TO_USEC(T,RATE) (((T)%(RATE)*1000000)/RATE)
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rusage->ru_utime.tv_sec = TICK_TO_SEC(u, tick_rate);
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rusage->ru_utime.tv_usec = TICK_TO_USEC(u, tick_rate);
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rusage->ru_stime.tv_sec = TICK_TO_SEC(s, tick_rate);
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rusage->ru_stime.tv_usec = TICK_TO_USEC(u, tick_rate);
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#endif /* WIN32 */
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return 0;
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}
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