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- /* Copyright (C) 1991, 1992, 1993 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;
- }
-