1: /* Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
    2:    This file is part of the GNU C Library.
    3: 
    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.
    8: 
    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.
   13: 
   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.  */
   18: 
   19: #include <errno.h>
   20: #include <stdlib.h>
   21: #include <time.h>
   22: #include <libc-internal.h>
   23: #include "pthreadP.h"
   24: 
   25: 
   26: #if HP_TIMING_AVAIL
   27: int
   28: __pthread_clock_settime (clockid_t clock_id, hp_timing_t offset)
   29: {
   30:   /* This is the ID of the thread we are looking for.  */
   31:   pid_t tid = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
   32: 
   33:   /* Compute the offset since the start time of the process.  */
   34:   if (tid == 0 || tid == THREAD_GETMEM (THREAD_SELF, tid))
   35:     /* Our own clock.  */
   36:     THREAD_SETMEM (THREAD_SELF, cpuclock_offset, offset);
   37:   else
   38:     {
   39:       /* This is more complicated.  We have to locate the thread based
   40:          on the ID.  This means walking the list of existing
   41:          threads.  */
   42:       struct pthread *thread = __find_thread_by_id (tid);
   43:       if (thread == NULL)
   44:         {
   45:           __set_errno (EINVAL);
   46:           return -1;
   47:         }
   48: 
   49:       /* There is a race here.  The thread might terminate and the stack
   50:          become unusable.  But this is the user's problem.  */
   51:       thread->cpuclock_offset = offset;
   52:     }
   53: 
   54:   return 0;
   55: }
   56: #endif