mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/* Set the default attributes to be used by pthread_create in the process.
|
|
Copyright (C) 2013-2018 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
|
|
<http://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;
|
|
struct pthread_attr attrs;
|
|
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;
|
|
|
|
attrs = *real_in;
|
|
|
|
/* Now take the lock because we start writing into
|
|
__default_pthread_attr. */
|
|
lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
|
|
|
|
/* Free the cpuset if the input is 0. Otherwise copy in the cpuset
|
|
contents. */
|
|
size_t cpusetsize = attrs.cpusetsize;
|
|
if (cpusetsize == 0)
|
|
{
|
|
free (__default_pthread_attr.cpuset);
|
|
__default_pthread_attr.cpuset = NULL;
|
|
}
|
|
else if (cpusetsize == __default_pthread_attr.cpusetsize)
|
|
{
|
|
attrs.cpuset = __default_pthread_attr.cpuset;
|
|
memcpy (attrs.cpuset, real_in->cpuset, cpusetsize);
|
|
}
|
|
else
|
|
{
|
|
/* This may look wrong at first sight, but it isn't. We're freeing
|
|
__default_pthread_attr.cpuset and allocating to attrs.cpuset because
|
|
we'll copy over all of attr to __default_pthread_attr later. */
|
|
cpu_set_t *newp = realloc (__default_pthread_attr.cpuset,
|
|
cpusetsize);
|
|
|
|
if (newp == NULL)
|
|
{
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
attrs.cpuset = newp;
|
|
memcpy (attrs.cpuset, real_in->cpuset, cpusetsize);
|
|
}
|
|
|
|
/* We don't want to accidentally set the default stacksize to zero. */
|
|
if (attrs.stacksize == 0)
|
|
attrs.stacksize = __default_pthread_attr.stacksize;
|
|
__default_pthread_attr = attrs;
|
|
|
|
out:
|
|
lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
|
|
return ret;
|
|
}
|