mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 02:53:34 +08:00
41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/* Get a clockid_t for the process CPU clock of a given process. Generic.
|
|
Copyright (C) 2000-2017 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 <errno.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
int
|
|
__clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
|
|
{
|
|
/* We don't allow any process ID but our own. */
|
|
if (pid != 0 && pid != getpid ())
|
|
return EPERM;
|
|
|
|
#ifdef CLOCK_PROCESS_CPUTIME_ID
|
|
/* Store the number. */
|
|
*clock_id = CLOCK_PROCESS_CPUTIME_ID;
|
|
|
|
return 0;
|
|
#else
|
|
/* We don't have a timer for that. */
|
|
return ENOENT;
|
|
#endif
|
|
}
|
|
weak_alias (__clock_getcpuclockid, clock_getcpuclockid)
|