1 /* Return the time used by the program so far (user time + system time).
2 Copyright (C) 1991-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #include <sys/times.h>
23 #if CLOCKS_PER_SEC != 1000000l
24 # error "CLOCKS_PER_SEC should be 1000000"
32 /* clock_gettime shouldn't fail here since CLOCK_PROCESS_CPUTIME_ID is
33 supported since 2.6.12. Check the return value anyway in case the kernel
34 barfs on us for some reason. */
35 if (__glibc_unlikely (__clock_gettime (CLOCK_PROCESS_CPUTIME_ID
, &ts
) != 0))
38 return (ts
.tv_sec
* CLOCKS_PER_SEC
39 + ts
.tv_nsec
/ (1000000000 / CLOCKS_PER_SEC
));