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/* Copyright (C) 2002-2023 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 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
<https://www.gnu.org/licenses/>. */
#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;
/* See CREATE THREAD NOTES in nptl/pthread_create.c. */
lll_lock (pd->lock, LLL_PRIVATE);
/* The library is responsible for maintaining the values at all
times. If the user uses an 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;
}
libc_hidden_def (__pthread_getschedparam)
strong_alias (__pthread_getschedparam, pthread_getschedparam)
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