88 строки
1.8 KiB
C
88 строки
1.8 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights 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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#ifndef OMPI_MUTEX_WINDOWS_H
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#define OMPI_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 "class/ompi_object.h"
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#include "include/sys/atomic.h"
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#if defined(c_plusplus) || defined(__cplusplus)
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extern "C" {
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#endif
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struct ompi_mutex_t {
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ompi_object_t super;
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volatile LONG m_lock;
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};
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OMPI_DECLSPEC OBJ_CLASS_DECLARATION(ompi_mutex_t);
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static inline int ompi_mutex_trylock(ompi_mutex_t *m)
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{
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return (int) InterlockedExchange(&m->m_lock, 1);
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}
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static inline void ompi_mutex_lock(ompi_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 ompi_mutex_unlock(ompi_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 ompi_mutex_atomic_trylock(ompi_mutex_t *m)
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{
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return ompi_mutex_trylock(m);
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}
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static inline void ompi_mutex_atomic_lock(ompi_mutex_t *m)
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{
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ompi_mutex_lock(m);
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}
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static inline void ompi_mutex_atomic_unlock(ompi_mutex_t *m)
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{
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ompi_mutex_unlock(m);
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}
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#if defined(c_plusplus) || defined(__cplusplus)
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}
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#endif
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#endif /* OMPI_MUTEX_WINDOWS_H */
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