glibc/nptl/pthread_setattr_default_np.c
Paul Eggert 2b778ceb40 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
2021-01-02 12:17:34 -08:00

94 lines
2.8 KiB
C

/* Set the default attributes to be used by pthread_create in the process.
Copyright (C) 2013-2021 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 <stdlib.h>
#include <pthreadP.h>
#include <string.h>
int
pthread_setattr_default_np (const pthread_attr_t *in)
{
const struct pthread_attr *real_in;
int ret;
real_in = (struct pthread_attr *) in;
/* Catch invalid values. */
int policy = real_in->schedpolicy;
ret = check_sched_policy_attr (policy);
if (ret)
return ret;
const struct sched_param *param = &real_in->schedparam;
if (param->sched_priority > 0)
{
ret = check_sched_priority_attr (param->sched_priority, policy);
if (ret)
return ret;
}
/* stacksize == 0 is fine. It means that we don't change the current
value. */
if (real_in->stacksize != 0)
{
ret = check_stacksize_attr (real_in->stacksize);
if (ret)
return ret;
}
/* Having a default stack address is wrong. */
if (real_in->flags & ATTR_FLAG_STACKADDR)
return EINVAL;
union pthread_attr_transparent temp;
ret = __pthread_attr_copy (&temp.external, in);
if (ret != 0)
return ret;
/* Now take the lock because we start accessing
__default_pthread_attr. */
lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
/* Preserve the previous stack size (see above). */
if (temp.internal.stacksize == 0)
temp.internal.stacksize = __default_pthread_attr.internal.stacksize;
/* Destroy the old attribute structure because it will be
overwritten. */
__pthread_attr_destroy (&__default_pthread_attr.external);
/* __default_pthread_attr takes ownership, so do not free
attrs.internal after this point. */
__default_pthread_attr = temp;
lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
return ret;
}
/* This is placed in the same file as pthread_setattr_default_np
because only this function can trigger allocation of attribute
data. This way, the function is automatically defined for all the
cases when it is needed in static builds. */
void
__default_pthread_attr_freeres (void)
{
__pthread_attr_destroy (&__default_pthread_attr.external);
}