6ef938de3f
more:
- Remove OPAL_ENABLE_MULTI_THREADS, since it didn't really do anything
correctly. Opal always has threads enabled at this point.
- Remove OMPI_ENABLE_PROGRESS_THREADS, since this hasn't worked in
8 years and it has performance issues we'll never be able to
overcome. Note that we have plans for re-adding async progress, using
a hybrid protocol of async and sync sends.
- OMPI_ENABLE_THREAD_MULTIPLE now determines whether the thread lock
macros do the check or not.
- Condition variables are ALWAYS polling right now, which fixes the thread
live-lock currently found when THREAD_MULTIPLE is turned on.
This commit was SVN r29891.
86 строки
2.4 KiB
C
86 строки
2.4 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2007-2013 Los Alamos National Security, LLC. All rights
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* reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "opal_config.h"
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#include "opal/threads/mutex.h"
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/*
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* Wait and see if some upper layer wants to use threads, if support
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* exists.
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*/
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#if OMPI_ENABLE_THREAD_MULTIPLE
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bool opal_uses_threads = false;
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#endif
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static void opal_mutex_construct(opal_mutex_t *m)
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{
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#if OPAL_HAVE_POSIX_THREADS
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#if OPAL_ENABLE_DEBUG
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pthread_mutexattr_t attr;
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pthread_mutexattr_init(&attr);
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/* set type to ERRORCHECK so that we catch recursive locks */
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#if OMPI_HAVE_PTHREAD_MUTEX_ERRORCHECK_NP
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK_NP);
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#elif OMPI_HAVE_PTHREAD_MUTEX_ERRORCHECK
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
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#endif /* OMPI_HAVE_PTHREAD_MUTEX_ERRORCHECK_NP */
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pthread_mutex_init(&m->m_lock_pthread, &attr);
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pthread_mutexattr_destroy(&attr);
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#else
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/* Without debugging, choose the fastest available mutexes */
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pthread_mutex_init(&m->m_lock_pthread, NULL);
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#endif /* OPAL_ENABLE_DEBUG */
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#elif OPAL_HAVE_SOLARIS_THREADS
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mutex_init(&m->m_lock_solaris, USYNC_THREAD, NULL);
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#endif
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#if OPAL_ENABLE_DEBUG
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m->m_lock_debug = 0;
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m->m_lock_file = NULL;
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m->m_lock_line = 0;
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#endif
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#if OPAL_HAVE_ATOMIC_SPINLOCKS
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opal_atomic_init( &m->m_lock_atomic, OPAL_ATOMIC_UNLOCKED );
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#endif
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}
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static void opal_mutex_destruct(opal_mutex_t *m)
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{
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#if OPAL_HAVE_POSIX_THREADS
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pthread_mutex_destroy(&m->m_lock_pthread);
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#elif OPAL_HAVE_SOLARIS_THREADS
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mutex_destroy(&m->m_lock_solaris);
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#endif
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}
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OBJ_CLASS_INSTANCE(opal_mutex_t,
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opal_object_t,
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opal_mutex_construct,
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opal_mutex_destruct);
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