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54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/* C11 threads mutex initialization implementation.
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Copyright (C) 2018-2020 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 <stdalign.h>
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#include "thrd_priv.h"
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int
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mtx_init (mtx_t *mutex, int type)
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{
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_Static_assert (sizeof (mtx_t) == sizeof (pthread_mutex_t),
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"sizeof (mtx_t) != sizeof (pthread_mutex_t)");
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_Static_assert (alignof (mtx_t) == alignof (pthread_mutex_t),
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"alignof (mtx_t) != alignof (pthread_mutex_t)");
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pthread_mutexattr_t attr;
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__pthread_mutexattr_init (&attr);
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/* Another possible solution would be to set the flags directly in
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mutex object. */
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switch (type)
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{
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case mtx_plain | mtx_recursive:
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case mtx_timed | mtx_recursive:
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__pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
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break;
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case mtx_plain:
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case mtx_timed: /* No difference between both in standard */
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default:
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__pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_NORMAL);
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break;
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}
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int err_code = __pthread_mutex_init ((pthread_mutex_t *) mutex, &attr);
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/* pthread_mutexattr_destroy implementation is a noop. */
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return thrd_err_map (err_code);
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}
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