55 строки
2.3 KiB
C
55 строки
2.3 KiB
C
/*
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* Copyright (c) 2013 Mellanox Technologies, Inc.
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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 "oshmem_config.h"
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#include "oshmem/constants.h"
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#include "oshmem/include/shmem.h"
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#include "oshmem/runtime/runtime.h"
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#include "oshmem/mca/atomic/atomic.h"
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/*
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* shmem_swap performs an atomic swap operation.
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* The atomic swap routines write value to address target on PE pe, and return the previous
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* contents of target. The operation must be completed without the possibility of another
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* process updating target between the time of the fetch and the update.
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*/
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#define SHMEM_TYPE_SWAP(type_name, type) \
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type shmem##type_name##_swap(type *target, type value, int pe) \
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{ \
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int rc = OSHMEM_SUCCESS; \
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size_t size = 0; \
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type out_value; \
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\
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RUNTIME_CHECK_INIT(); \
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RUNTIME_CHECK_PE(pe); \
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RUNTIME_CHECK_ADDR(target); \
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\
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size = sizeof(out_value); \
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rc = MCA_ATOMIC_CALL(cswap( \
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(void*)target, \
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(void*)&out_value, \
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NULL, \
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(const void*)&value, \
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size, \
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pe)); \
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RUNTIME_CHECK_RC(rc); \
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\
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return out_value; \
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}
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SHMEM_TYPE_SWAP(, long)
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SHMEM_TYPE_SWAP(_int, int)
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SHMEM_TYPE_SWAP(_long, long)
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SHMEM_TYPE_SWAP(_longlong, long long)
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SHMEM_TYPE_SWAP(_float, float)
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SHMEM_TYPE_SWAP(_double, double)
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