54998e5745
This new class is the same as the opal_mutex_t class but has a different constructor. This constructor adds the recursive flag to the mutex attributes for the lock. This class can be used where there may be re-enty into the lock from within the same thread. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
101 строка
3.0 KiB
C
101 строка
3.0 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 (c) 2015 Research Organization for Information Science
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* and Technology (RIST). 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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* 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_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 OPAL_HAVE_PTHREAD_MUTEX_ERRORCHECK_NP
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK_NP);
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#elif OPAL_HAVE_PTHREAD_MUTEX_ERRORCHECK
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
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#endif /* OPAL_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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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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#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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#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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pthread_mutex_destroy(&m->m_lock_pthread);
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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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static void opal_recursive_mutex_construct(opal_recursive_mutex_t *m)
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{
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pthread_mutexattr_t attr;
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pthread_mutexattr_init(&attr);
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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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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
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pthread_mutex_init(&m->m_lock_pthread, &attr);
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pthread_mutexattr_destroy(&attr);
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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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OBJ_CLASS_INSTANCE(opal_recursive_mutex_t,
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opal_object_t,
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opal_recursive_mutex_construct,
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opal_mutex_destruct);
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