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/* Deep copy of a pthread_attr_t object.
Copyright (C) 2020-2021 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 <pthreadP.h>
#include <stdlib.h>
int
__pthread_attr_copy (pthread_attr_t *target, const pthread_attr_t *source)
{
/* Avoid overwriting *TARGET until all allocations have
succeeded. */
union pthread_attr_transparent temp;
temp.external = *source;
/* Force new allocation. This function has full ownership of temp. */
temp.internal.extension = NULL;
int ret = 0;
struct pthread_attr *isource = (struct pthread_attr *) source;
if (isource->extension != NULL)
{
/* Propagate affinity mask information. */
if (isource->extension->cpusetsize > 0)
ret = __pthread_attr_setaffinity_np (&temp.external,
isource->extension->cpusetsize,
isource->extension->cpuset);
/* Propagate the signal mask information. */
if (ret == 0 && isource->extension->sigmask_set)
ret = __pthread_attr_setsigmask_internal ((pthread_attr_t *) &temp,
&isource->extension->sigmask);
}
if (ret != 0)
{
/* Deallocate because we have ownership. */
__pthread_attr_destroy (&temp.external);
return ret;
}
/* Transfer ownership. *target is not assumed to have been
initialized. */
*target = temp.external;
return 0;
}
libc_hidden_def (__pthread_attr_copy)
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