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67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
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/* Transfer ownership of a mutex. Generic version.
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Copyright (C) 2008-2018 Free Software Foundation, Inc.
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Written by Neal H. Walfield <neal@gnu.org>.
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This file is part of the GNU Hurd.
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The GNU Hurd is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License
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as published by the Free Software Foundation; either version 3 of
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the License, or (at your option) any later version.
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The GNU Hurd is distributed in the hope that it will be useful, but
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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 this program. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <assert.h>
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#include <pt-internal.h>
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int
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__pthread_mutex_transfer_np (struct __pthread_mutex *mutex, pthread_t tid)
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{
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assert (mutex->__owner == _pthread_self ());
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struct __pthread *thread = __pthread_getid (tid);
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const struct __pthread_mutexattr *attr = mutex->__attr;
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if (thread == NULL)
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return ESRCH;
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if (thread == _pthread_self ())
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return 0;
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if (attr == __PTHREAD_ERRORCHECK_MUTEXATTR)
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attr = &__pthread_errorcheck_mutexattr;
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if (attr == __PTHREAD_RECURSIVE_MUTEXATTR)
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attr = &__pthread_recursive_mutexattr;
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if (attr != NULL && attr->__mutex_type == PTHREAD_MUTEX_ERRORCHECK)
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{
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if (mutex->__owner != _pthread_self ())
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return EPERM;
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mutex->__owner = thread;
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}
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#ifndef NDEBUG
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# if !defined(ALWAYS_TRACK_MUTEX_OWNER)
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if (attr != NULL && attr->__mutex_type != PTHREAD_MUTEX_NORMAL)
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# endif
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{
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mutex->__owner = thread;
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}
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#endif
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return 0;
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}
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strong_alias (__pthread_mutex_transfer_np, pthread_mutex_transfer_np)
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