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c2322a561f
union pthread_attr_transparent has always the correct size, even if pthread_attr_t has padding that is not present in struct pthread_attr. This should not result in an observable behavioral change. The existing code appears to have been correct, but it was brittle because it was not clear which functions were allowed to write to an entire pthread_attr_t argument (e.g., by copying it). Reviewed-by: Carlos O'Donell <carlos@redhat.com>
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
/* Copyright (C) 2004-2020 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 <pthreadP.h>
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#include <stdlib.h>
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#include <tls.h>
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#include <unistd.h>
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/* Default thread attributes for the case when the user does not
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provide any. */
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union pthread_attr_transparent __default_pthread_attr attribute_hidden;
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/* Mutex protecting __default_pthread_attr. */
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int __default_pthread_attr_lock = LLL_LOCK_INITIALIZER;
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/* Flag whether the machine is SMP or not. */
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int __is_smp attribute_hidden;
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#ifndef TLS_MULTIPLE_THREADS_IN_TCB
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/* Variable set to a nonzero value either if more than one thread runs or ran,
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or if a single-threaded process is trying to cancel itself. See
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nptl/descr.h for more context on the single-threaded process case. */
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int __pthread_multiple_threads attribute_hidden;
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#endif
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/* Table of the key information. */
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struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX]
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__attribute__ ((nocommon));
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hidden_data_def (__pthread_keys)
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