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/* Get process times
Copyright (C) 2008-2013 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>. */
/* Written by Simon Josefsson <simon@josefsson.org>, 2008. */
#include <config.h>
/* Get times prototype. */
#include <sys/times.h>
/* Get round. */
#include <math.h>
/* Get GetProcessTimes etc. */
#include <windows.h>
static clock_t
filetime2clock (FILETIME time)
{
float f;
/* We have a 64-bit value, in the form of two DWORDS aka unsigned
int, counting the number of 100-nanosecond intervals. We need to
convert these to clock ticks. Older POSIX uses CLK_TCK to
indicate the number of clock ticks per second while modern POSIX
uses sysconf(_SC_CLK_TCK). Mingw32 does not appear to have
sysconf(_SC_CLK_TCK), but appears to have CLK_TCK = 1000 so we
use it. Note that CLOCKS_PER_SEC constant does not apply here,
it is for use with the clock function. */
f = (unsigned long long) time.dwHighDateTime << 32;
f += time.dwLowDateTime;
f = f * CLK_TCK / 10000000;
return (clock_t) round (f);
}
clock_t
times (struct tms * buffer)
{
FILETIME creation_time, exit_time, kernel_time, user_time;
if (GetProcessTimes (GetCurrentProcess (), &creation_time, &exit_time,
&kernel_time, &user_time) == 0)
return (clock_t) -1;
buffer->tms_utime = filetime2clock (user_time);
buffer->tms_stime = filetime2clock (kernel_time);
buffer->tms_cutime = 0;
buffer->tms_cstime = 0;
return filetime2clock (creation_time);
}
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