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author | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
commit | 28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch) | |
tree | 15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/unix/bsd/times.c | |
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initial import
Diffstat (limited to 'sysdeps/unix/bsd/times.c')
-rw-r--r-- | sysdeps/unix/bsd/times.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/times.c b/sysdeps/unix/bsd/times.c new file mode 100644 index 0000000000..edf3e90972 --- /dev/null +++ b/sysdeps/unix/bsd/times.c @@ -0,0 +1,68 @@ +/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <errno.h> +#include <stddef.h> +#include <sys/times.h> +#include <sys/time.h> +#include <sys/resource.h> + + +/* Time the program started. */ +extern time_t _posix_start_time; + +#ifdef __GNUC__ +__inline +#endif +static clock_t +DEFUN(timeval_to_clock_t, (tv), CONST struct timeval *tv) +{ + return (clock_t) ((tv->tv_sec * CLK_TCK) + + (tv->tv_usec * CLK_TCK / 1000000L)); +} + +/* Store the CPU time used by this process and all its + dead children (and their dead children) in BUFFER. + Return the elapsed real time, or (clock_t) -1 for errors. + All times are in CLK_TCKths of a second. */ +clock_t +DEFUN(__times, (buffer), struct tms *buffer) +{ + struct rusage usage; + + if (buffer == NULL) + { + errno = EINVAL; + return (clock_t) -1; + } + + if (__getrusage(RUSAGE_SELF, &usage) < 0) + return (clock_t) -1; + buffer->tms_utime = (clock_t) timeval_to_clock_t(&usage.ru_utime); + buffer->tms_stime = (clock_t) timeval_to_clock_t(&usage.ru_stime); + + if (__getrusage(RUSAGE_CHILDREN, &usage) < 0) + return (clock_t) -1; + buffer->tms_cutime = (clock_t) timeval_to_clock_t(&usage.ru_utime); + buffer->tms_cstime = (clock_t) timeval_to_clock_t(&usage.ru_stime); + + return (time((time_t *) NULL) - _posix_start_time) * CLK_TCK; +} + +weak_alias (__times, times) |