mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* Copyright (C) 2000, 2001, 2002, 2003 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; see the file COPYING.LIB. If
|
|
not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <pthreadP.h>
|
|
#include <sys/time.h>
|
|
#include <tls.h>
|
|
|
|
|
|
int
|
|
pthread_getcpuclockid (threadid, clockid)
|
|
pthread_t threadid;
|
|
clockid_t *clockid;
|
|
{
|
|
struct pthread *pd = (struct pthread *) threadid;
|
|
|
|
/* Make sure the descriptor is valid. */
|
|
if (INVALID_TD_P (pd))
|
|
/* Not a valid thread handle. */
|
|
return ESRCH;
|
|
|
|
#ifdef CLOCK_THREAD_CPUTIME_ID
|
|
/* We need to store the thread ID in the CLOCKID variable together
|
|
with a number identifying the clock. We reserve the low 3 bits
|
|
for the clock ID and the rest for the thread ID. This is
|
|
problematic if the thread ID is too large. But 29 bits should be
|
|
fine.
|
|
|
|
If some day more clock IDs are needed the ID part can be
|
|
enlarged. The IDs are entirely internal. */
|
|
if (pd->tid >= 1 << (8 * sizeof (*clockid) - CLOCK_IDFIELD_SIZE))
|
|
return ERANGE;
|
|
|
|
/* Store the number. */
|
|
*clockid = CLOCK_THREAD_CPUTIME_ID | (pd->tid << CLOCK_IDFIELD_SIZE);
|
|
|
|
return 0;
|
|
#else
|
|
/* We don't have a timer for that. */
|
|
return ENOENT;
|
|
#endif
|
|
}
|