1: /* Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
    2:    This file is part of the GNU C Library.
    3:    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
    4: 
    5:    The GNU C Library is free software; you can redistribute it and/or
    6:    modify it under the terms of the GNU Lesser General Public
    7:    License as published by the Free Software Foundation; either
    8:    version 2.1 of the License, or (at your option) any later version.
    9: 
   10:    The GNU C Library is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   13:    Lesser General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU Lesser General Public
   16:    License along with the GNU C Library; if not, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #include <errno.h>
   21: #include <string.h>
   22: #include "pthreadP.h"
   23: #include <lowlevellock.h>
   24: 
   25: 
   26: int
   27: __pthread_getschedparam (threadid, policy, param)
   28:      pthread_t threadid;
   29:      int *policy;
   30:      struct sched_param *param;
   31: {
   32:   struct pthread *pd = (struct pthread *) threadid;
   33: 
   34:   /* Make sure the descriptor is valid.  */
   35:   if (INVALID_TD_P (pd))
   36:     /* Not a valid thread handle.  */
   37:     return ESRCH;
   38: 
   39:   int result = 0;
   40: 
   41:   lll_lock (pd->lock, LLL_PRIVATE);
   42: 
   43:   /* The library is responsible for maintaining the values at all
   44:      times.  If the user uses a interface other than
   45:      pthread_setschedparam to modify the scheduler setting it is not
   46:      the library's problem.  In case the descriptor's values have
   47:      not yet been retrieved do it now.  */
   48:   if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
   49:     {
   50:       if (__sched_getparam (pd->tid, &pd->schedparam) != 0)
   51:         result = 1;
   52:       else
   53:         pd->flags |= ATTR_FLAG_SCHED_SET;
   54:     }
   55: 
   56:   if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)
   57:     {
   58:       pd->schedpolicy = __sched_getscheduler (pd->tid);
   59:       if (pd->schedpolicy == -1)
   60:         result = 1;
   61:       else
   62:         pd->flags |= ATTR_FLAG_POLICY_SET;
   63:     }
   64: 
   65:   if (result == 0)
   66:     {
   67:       *policy = pd->schedpolicy;
   68:       memcpy (param, &pd->schedparam, sizeof (struct sched_param));
   69:     }
   70: 
   71:   lll_unlock (pd->lock, LLL_PRIVATE);
   72: 
   73:   return result;
   74: }
   75: strong_alias (__pthread_getschedparam, pthread_getschedparam)