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66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/* Get process times
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Copyright (C) 2008-2021 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <https://www.gnu.org/licenses/>. */
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/* Written by Simon Josefsson <simon@josefsson.org>, 2008. */
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#include <config.h>
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/* Get times prototype. */
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#include <sys/times.h>
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/* Get round. */
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#include <math.h>
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/* Get GetProcessTimes etc. */
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#include <windows.h>
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static clock_t
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filetime2clock (FILETIME time)
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{
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float f;
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/* We have a 64-bit value, in the form of two DWORDS aka unsigned
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int, counting the number of 100-nanosecond intervals. We need to
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convert these to clock ticks. Older POSIX uses CLK_TCK to
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indicate the number of clock ticks per second while modern POSIX
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uses sysconf(_SC_CLK_TCK). Mingw32 does not appear to have
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sysconf(_SC_CLK_TCK), but appears to have CLK_TCK = 1000 so we
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use it. Note that CLOCKS_PER_SEC constant does not apply here,
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it is for use with the clock function. */
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f = (unsigned long long) time.dwHighDateTime << 32;
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f += time.dwLowDateTime;
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f = f * CLK_TCK / 10000000;
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return (clock_t) round (f);
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}
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clock_t
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times (struct tms * buffer)
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{
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FILETIME creation_time, exit_time, kernel_time, user_time;
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if (GetProcessTimes (GetCurrentProcess (), &creation_time, &exit_time,
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&kernel_time, &user_time) == 0)
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return (clock_t) -1;
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buffer->tms_utime = filetime2clock (user_time);
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buffer->tms_stime = filetime2clock (kernel_time);
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buffer->tms_cutime = 0;
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buffer->tms_cstime = 0;
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return clock ();
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}
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