65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/* Deep copy of a pthread_attr_t object.
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Copyright (C) 2020-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <pthreadP.h>
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#include <stdlib.h>
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int
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__pthread_attr_copy (pthread_attr_t *target, const pthread_attr_t *source)
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{
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/* Avoid overwriting *TARGET until all allocations have
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succeeded. */
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union pthread_attr_transparent temp;
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temp.external = *source;
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/* Force new allocation. This function has full ownership of temp. */
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temp.internal.extension = NULL;
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int ret = 0;
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struct pthread_attr *isource = (struct pthread_attr *) source;
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if (isource->extension != NULL)
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{
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/* Propagate affinity mask information. */
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if (isource->extension->cpusetsize > 0)
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ret = __pthread_attr_setaffinity_np (&temp.external,
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isource->extension->cpusetsize,
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isource->extension->cpuset);
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/* Propagate the signal mask information. */
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if (ret == 0 && isource->extension->sigmask_set)
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ret = __pthread_attr_setsigmask_internal ((pthread_attr_t *) &temp,
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&isource->extension->sigmask);
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}
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if (ret != 0)
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{
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/* Deallocate because we have ownership. */
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__pthread_attr_destroy (&temp.external);
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return ret;
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}
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/* Transfer ownership. *target is not assumed to have been
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initialized. */
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*target = temp.external;
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return 0;
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}
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libc_hidden_def (__pthread_attr_copy)
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