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b026ce1ee9
In pthread_tryjoin if pd->tid == 0 then we will not block on a futex operation because we will immediately see the join is already complete and return. The comment is fixed to reflect that. Signed-off-by: Carlos O'Donell <carlos@redhat.com>
33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
/* Copyright (C) 2002-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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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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<http://www.gnu.org/licenses/>. */
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#include "pthreadP.h"
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int
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pthread_tryjoin_np (pthread_t threadid, void **thread_return)
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{
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/* Return right away if the thread hasn't terminated yet. */
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struct pthread *pd = (struct pthread *) threadid;
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if (pd->tid != 0)
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return EBUSY;
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/* If pd->tid == 0 then lll_wait_tid will not block on futex
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operation. */
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return __pthread_timedjoin_ex (threadid, thread_return, NULL, false);
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}
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