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/* 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, see <http://www.gnu.org/licenses/>. */ #include <errno.h> #include <sched.h> #include <string.h> #include <sched.h> #include "pthreadP.h" #include <lowlevellock.h> int pthread_setschedprio ( pthread_t threadid, int prio) { 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; struct sched_param param; param.sched_priority = prio; lll_lock (pd->lock, LLL_PRIVATE); /* If the thread should have higher priority because of some PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */ if (__builtin_expect (pd->tpp != NULL, 0) && pd->tpp->priomax > prio) param.sched_priority = pd->tpp->priomax; /* Try to set the scheduler information. */ if (__builtin_expect (sched_setparam (pd->tid, ¶m) == -1, 0)) result = errno; else { /* We succeeded changing the kernel information. Reflect this change in the thread descriptor. */ param.sched_priority = prio; memcpy (&pd->schedparam, ¶m, sizeof (struct sched_param)); pd->flags |= ATTR_FLAG_SCHED_SET; } lll_unlock (pd->lock, LLL_PRIVATE); return result; } |