glibc/rt/clock_getcpuclockid.c
2005-12-14 08:43:25 +00:00

40 lines
1.2 KiB
C

/* Copyright (C) 2000, 2001 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#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
}