glibc/nptl/pthread_attr_extension.c

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/* Allocate the extension space for struct pthread_attr.
Copyright (C) 2020-2022 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 <pthreadP.h>
#include <stdlib.h>
int
__pthread_attr_extension (struct pthread_attr *attr)
{
if (attr->extension != NULL)
return 0;
attr->extension = calloc (sizeof (*attr->extension), 1);
if (attr->extension == NULL)
return errno;
return 0;
}