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43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* Copyright (C) 2002-2015 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 <errno.h>
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#include "pthreadP.h"
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#include <atomic.h>
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int
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pthread_key_delete (key)
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pthread_key_t key;
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{
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int result = EINVAL;
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if (__glibc_likely (key < PTHREAD_KEYS_MAX))
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{
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unsigned int seq = __pthread_keys[key].seq;
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if (__builtin_expect (! KEY_UNUSED (seq), 1)
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&& ! atomic_compare_and_exchange_bool_acq (&__pthread_keys[key].seq,
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seq + 1, seq))
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/* We deleted a valid key. */
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result = 0;
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}
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return result;
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}
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