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39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/* Change priority protocol setting in pthread_mutexattr_t.
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Copyright (C) 2006-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
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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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int
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pthread_mutexattr_setprotocol (pthread_mutexattr_t *attr, int protocol)
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{
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if (protocol != PTHREAD_PRIO_NONE
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&& protocol != PTHREAD_PRIO_INHERIT
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&& __builtin_expect (protocol != PTHREAD_PRIO_PROTECT, 0))
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return EINVAL;
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struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
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iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PROTOCOL_MASK)
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| (protocol << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT));
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return 0;
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}
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