Update.
[glibc.git] / linuxthreads / ptclock_settime.c
bloba4f218c771787fb29ad15e5de707195e371d0f4b
1 /* Copyright (C) 2001, 2004 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <errno.h>
20 #include <time.h>
21 #include <libc-internal.h>
22 #include "internals.h"
23 #include "spinlock.h"
26 #if HP_TIMING_AVAIL
27 int
28 __pthread_clock_settime (clockid_t clock_id, hp_timing_t offset)
30 pthread_descr self = thread_self ();
31 pthread_t thread = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
32 const unsigned int mask = ~0U >> CLOCK_IDFIELD_SIZE;
34 if (thread == 0 || (THREAD_GETMEM (self, p_tid) & mask) == thread)
35 /* Our own clock. */
36 THREAD_SETMEM (self, p_cpuclock_offset, offset);
37 else
39 pthread_descr th;
40 pthread_handle handle = thread_handle (thread);
41 __pthread_lock (&handle->h_lock, NULL);
42 th = handle->h_descr;
43 if (th == NULL || (th->p_tid & mask) != thread || th->p_terminated)
45 __pthread_unlock (&handle->h_lock);
46 __set_errno (EINVAL);
47 return -1;
49 th->p_cpuclock_offset = offset;
50 __pthread_unlock (&handle->h_lock);
53 return 0;
55 #endif