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NPTL: Refactor scheduler setup in pthread_create.

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This commit is contained in:
Roland McGrath
2014-11-20 10:56:20 -08:00
parent e37c91d419
commit f214ff74f4
4 changed files with 91 additions and 15 deletions
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42
sysdeps/unix/sysv/linux/default-sched.h Normal file
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/* Determine calling thread's scheduling parameters. Linux version.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <http://www.gnu.org/licenses/>. */
#include <sysdep.h>
/* This should fill in PD->schedpolicy if PD->flags does not contain
ATTR_FLAG_POLICY_SET, and set it; and PD->schedparam if PD->flags does
not contain ATTR_FLAG_SCHED_SET, and set it. It won't be called at all
if both bits are already set. */
static void
collect_default_sched (struct pthread *pd)
{
INTERNAL_SYSCALL_DECL (scerr);
if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)
{
pd->schedpolicy = INTERNAL_SYSCALL (sched_getscheduler, scerr, 1, 0);
pd->flags |= ATTR_FLAG_POLICY_SET;
}
if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
{
INTERNAL_SYSCALL (sched_getparam, scerr, 2, 0, &pd->schedparam);
pd->flags |= ATTR_FLAG_SCHED_SET;
}
}