|
Packit |
6c4009 |
/* clock_getcpuclockid -- Get a clockid_t for process CPU time. Linux version.
|
|
Packit |
6c4009 |
Copyright (C) 2004-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library; if not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <errno.h>
|
|
Packit |
6c4009 |
#include <time.h>
|
|
Packit |
6c4009 |
#include <unistd.h>
|
|
Packit |
6c4009 |
#include "kernel-posix-cpu-timers.h"
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
int
|
|
Packit |
6c4009 |
__clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* The clockid_t value is a simple computation from the PID.
|
|
Packit |
6c4009 |
But we do a clock_getres call to validate it. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
const clockid_t pidclock = MAKE_PROCESS_CPUCLOCK (pid, CPUCLOCK_SCHED);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
INTERNAL_SYSCALL_DECL (err);
|
|
Packit |
6c4009 |
int r = INTERNAL_SYSCALL (clock_getres, err, 2, pidclock, NULL);
|
|
Packit |
6c4009 |
if (!INTERNAL_SYSCALL_ERROR_P (r, err))
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
*clock_id = pidclock;
|
|
Packit |
6c4009 |
return 0;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* The clock_getres system call checked the PID for us. */
|
|
Packit |
6c4009 |
return ESRCH;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
else
|
|
Packit |
6c4009 |
return INTERNAL_SYSCALL_ERRNO (r, err);
|
|
Packit |
6c4009 |
}
|
|
Packit Service |
562438 |
weak_alias (__clock_getcpuclockid, clock_getcpuclockid)
|