55 строки
2.4 KiB
C
55 строки
2.4 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2013 Mellanox Technologies, Inc.
|
||
|
|
* All rights reserved.
|
||
|
|
* $COPYRIGHT$
|
||
|
|
*
|
||
|
|
* Additional copyrights may follow
|
||
|
|
*
|
||
|
|
* $HEADER$
|
||
|
|
*/
|
||
|
|
#include "oshmem_config.h"
|
||
|
|
|
||
|
|
#include "oshmem/constants.h"
|
||
|
|
#include "oshmem/include/shmem.h"
|
||
|
|
|
||
|
|
#include "oshmem/runtime/runtime.h"
|
||
|
|
|
||
|
|
#include "oshmem/mca/atomic/atomic.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* shmem_cswap performs an atomic conditional swap operation.
|
||
|
|
* The conditional swap routines write value to address target on PE pe, and return the previous
|
||
|
|
* contents of target. The replacement must occur only if cond is equal to target;
|
||
|
|
* otherwise target is left unchanged. In either case, the routine must return the initial value
|
||
|
|
* of target. The operation must be completed without the possibility of another process updating
|
||
|
|
* target between the time of the fetch and the update.
|
||
|
|
*/
|
||
|
|
#define SHMEM_TYPE_CSWAP(type_name, type) \
|
||
|
|
type shmem##type_name##_cswap(type *target, type cond, type value, int pe) \
|
||
|
|
{ \
|
||
|
|
int rc = OSHMEM_SUCCESS; \
|
||
|
|
size_t size = 0; \
|
||
|
|
type out_value; \
|
||
|
|
\
|
||
|
|
RUNTIME_CHECK_INIT(); \
|
||
|
|
RUNTIME_CHECK_PE(pe); \
|
||
|
|
RUNTIME_CHECK_ADDR(target); \
|
||
|
|
\
|
||
|
|
size = sizeof(out_value); \
|
||
|
|
rc = MCA_ATOMIC_CALL(cswap( \
|
||
|
|
(void*)target, \
|
||
|
|
(void*)&out_value, \
|
||
|
|
(const void*)&cond, \
|
||
|
|
(const void*)&value, \
|
||
|
|
size, \
|
||
|
|
pe)); \
|
||
|
|
RUNTIME_CHECK_RC(rc); \
|
||
|
|
\
|
||
|
|
return out_value; \
|
||
|
|
}
|
||
|
|
|
||
|
|
SHMEM_TYPE_CSWAP(_int, int)
|
||
|
|
SHMEM_TYPE_CSWAP(_long, long)
|
||
|
|
SHMEM_TYPE_CSWAP(_longlong, long long)
|
||
|
|
|