b56c8c3a66
versions of the thread lock functions to determine at runtime if a lock is needed) to OMPI_ENABLE_PROGRESS_THREADS instead of OMPI_HAVE_THREAD_SUPPORT. Opal only starts a thread when OMPI_ENABLE_PROGRESS_THREADS is enabled, and ORTE never really starts a thread that requires special locking considerations. MPI_INIT would set opal_uses_threads to true if thread level was greater than MPI_THREAD_SINGLE, but it would never decreast the value of opal_uses_threads, meaning that we always enabled all that locking if we did a threaded build, which isn't neccessary. Now we do locking iff progress threads are enabled OR thread level is above MPI_THREAD_SINGLE. This commit was SVN r11390.
85 строки
2.3 KiB
C
85 строки
2.3 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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* $COPYRIGHT$
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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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* If we have progress threads, always default to using threads.
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* Otherwise, wait and see if some upper layer wants to use threads.
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*/
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bool opal_uses_threads = (bool) OMPI_ENABLE_PROGRESS_THREADS;
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#ifdef __WINDOWS__
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#include <windows.h>
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static void opal_mutex_construct(opal_mutex_t *m)
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{
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InterlockedExchange(&m->m_lock, 0);
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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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}
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#else
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static void opal_mutex_construct(opal_mutex_t *m)
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{
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#if OMPI_HAVE_POSIX_THREADS
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pthread_mutexattr_t attr;
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pthread_mutexattr_init(&attr);
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#if OMPI_ENABLE_DEBUG && OMPI_HAVE_PTHREAD_MUTEX_ERRORCHECK_NP
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/* set type to ERRORCHECK so that we catch recursive locks */
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK_NP);
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#elif OMPI_ENABLE_DEBUG && OMPI_HAVE_PTHREAD_MUTEX_ERRORCHECK
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/* set type to ERRORCHECK so that we catch recursive locks */
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
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#endif
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pthread_mutex_init(&m->m_lock_pthread, &attr);
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pthread_mutexattr_destroy(&attr);
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#endif /* OMPI_HAVE_POSIX_THREADS */
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#if OMPI_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_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 OMPI_HAVE_POSIX_THREADS
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pthread_mutex_destroy(&m->m_lock_pthread);
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#endif
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}
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#endif
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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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