96 строки
2.1 KiB
C
96 строки
2.1 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 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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#ifndef OPAL_MUTEX_WINDOWS_H
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#define OPAL_MUTEX_WINDOWS_H 1
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/**
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* @file:
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*
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* Mutual exclusion functions: Windows implementation.
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*
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* Functions for locking of critical sections.
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*
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* On Windows, base everything on InterlockedExchange().
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*/
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#include "opal_config.h"
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#include "opal/class/opal_object.h"
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#include "opal/sys/atomic.h"
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BEGIN_C_DECLS
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struct opal_mutex_t {
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opal_object_t super;
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volatile LONG m_lock;
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#if OPAL_ENABLE_DEBUG
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int m_lock_debug;
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const char *m_lock_file;
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int m_lock_line;
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#endif
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};
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OPAL_DECLSPEC OBJ_CLASS_DECLARATION(opal_mutex_t);
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static inline int opal_mutex_trylock(opal_mutex_t *m)
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{
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return (0 == InterlockedExchange(&m->m_lock, 1) ? 1 : 0);
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}
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static inline void opal_mutex_lock(opal_mutex_t *m)
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{
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while (InterlockedExchange(&m->m_lock, 1)) {
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while (m->m_lock == 1) {
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/* spin */;
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}
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}
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}
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static inline void opal_mutex_unlock(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 inline int opal_mutex_atomic_trylock(opal_mutex_t *m)
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{
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return opal_mutex_trylock(m);
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}
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static inline void opal_mutex_atomic_lock(opal_mutex_t *m)
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{
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opal_mutex_lock(m);
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}
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static inline void opal_mutex_atomic_unlock(opal_mutex_t *m)
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{
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opal_mutex_unlock(m);
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}
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END_C_DECLS
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#endif /* OPAL_MUTEX_WINDOWS_H */
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