diff options
Diffstat (limited to 'libpthread/nptl/pthread_getschedparam.c')
| -rw-r--r-- | libpthread/nptl/pthread_getschedparam.c | 75 | 
1 files changed, 75 insertions, 0 deletions
| diff --git a/libpthread/nptl/pthread_getschedparam.c b/libpthread/nptl/pthread_getschedparam.c new file mode 100644 index 000000000..bb5f0a97e --- /dev/null +++ b/libpthread/nptl/pthread_getschedparam.c @@ -0,0 +1,75 @@ +/* Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc. +   This file is part of the GNU C Library. +   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. + +   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 <string.h> +#include "pthreadP.h" +#include <lowlevellock.h> + + +int +__pthread_getschedparam ( +     pthread_t threadid, +     int *policy, +     struct sched_param *param) +{ +  struct pthread *pd = (struct pthread *) threadid; + +  /* Make sure the descriptor is valid.  */ +  if (INVALID_TD_P (pd)) +    /* Not a valid thread handle.  */ +    return ESRCH; + +  int result = 0; + +  lll_lock (pd->lock, LLL_PRIVATE); + +  /* The library is responsible for maintaining the values at all +     times.  If the user uses a interface other than +     pthread_setschedparam to modify the scheduler setting it is not +     the library's problem.  In case the descriptor's values have +     not yet been retrieved do it now.  */ +  if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0) +    { +      if (sched_getparam (pd->tid, &pd->schedparam) != 0) +	result = 1; +      else +	pd->flags |= ATTR_FLAG_SCHED_SET; +    } + +  if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0) +    { +      pd->schedpolicy = sched_getscheduler (pd->tid); +      if (pd->schedpolicy == -1) +	result = 1; +      else +	pd->flags |= ATTR_FLAG_POLICY_SET; +    } + +  if (result == 0) +    { +      *policy = pd->schedpolicy; +      memcpy (param, &pd->schedparam, sizeof (struct sched_param)); +    } + +  lll_unlock (pd->lock, LLL_PRIVATE); + +  return result; +} +strong_alias (__pthread_getschedparam, pthread_getschedparam) | 
