mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 15:20:10 +00:00
14ffbc8350
* pthread_attr_setschedparam.c: Don't test priority against limits here. Set ATTR_FLAG_SCHED_SET flag. * pthread_attr_setschedpolicy.c: Set ATTR_FLAG_POLICY_SET flag. * pthread_create.c (__pthread_create_2_1): Copy scheduling attributes from parent thread to child. If attribute is used and scheduling parameters are not inherited, copy parameters from attribute or compute them. Check priority value. * pthread_getschedparam.c: If the parameters aren't known yet get them from the kernel. * pthread_setschedparam.c: Set ATTR_FLAG_SCHED_SET and ATTR_FLAG_POLICY_SET flag for thread. * sysdeps/unix/sysv/linux/internaltypes.h: Define ATTR_FLAG_SCHED_SET and ATTR_FLAG_POLICY_SET. * sysdeps/pthread/createthread.c: Use tgkill if possible.
82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/* Copyright (C) 2002, 2003, 2004 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 (threadid, policy, param)
|
|
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;
|
|
|
|
/* We have to handle cancellation in the following code since we are
|
|
locking another threads descriptor. */
|
|
pthread_cleanup_push ((void (*) (void *)) lll_unlock_wake_cb, &pd->lock);
|
|
|
|
lll_lock (pd->lock);
|
|
|
|
/* 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);
|
|
|
|
pthread_cleanup_pop (0);
|
|
|
|
return result;
|
|
}
|
|
strong_alias (__pthread_getschedparam, pthread_getschedparam)
|