glibc/sysdeps/posix/clock.c

32 lines
1.0 KiB
C

/* Copyright (C) 1991-2013 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sys/times.h>
#include <time.h>
/* Return the time used by the program so far (user time + system time). */
clock_t
clock ()
{
struct tms buf;
if (__times (&buf) < 0)
return (clock_t) -1;
return buf.tms_utime + buf.tms_stime;
}