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shmem_int_add(3), shmem_int4_add(3), shmem_int8_add(3), shmem_long_add(3),
shmem_longlong_add(3) - Performs an atomic add operation.
C or C++:
#include <mpp/shmem.h>
void shmem_int_add(int *target, int value, int pe);
void shmem_long_add(long *target, long value, int pe);
void shmem_longlong_add(long long *target, long long value,
int pe);
Fortran:
include ’mpp/shmem.h’
INTEGER pe
CALL SHMEM_INT4_ADD(target, value, pe)
CALL SHMEM_INT8_ADD(target, value, pe)
The atomic add routines add value to the data at address target
on PE pe. The operation completes without the possibility of another process
updating target between the time of the fetch and the update.
The arguments
are as follows:
- target
- The remotely accessible integer data object to be
updated on the remote PE. If you are using C/C++, the type of target should
match that implied in the SYNOPSIS section. If you are using the Fortran
compiler, it must be of type integer with an element size of 4 bytes for
SHMEM_INT4_ADD and 8 bytes for SHMEM_INT8_ADD.
- value
- The value to be atomically
added to target. If you are using C/C++, the type of value should match
that implied in the SYNOPSIS section. If you are using Fortran, it must
be of type integer with an element size of target.
- pe
- An integer that indicates
the PE number upon which target is to be updated. If you are using Fortran,
it must be a default integer value.
The term remotely accessible is
defined in intro_shmem(3).
intro_shmem(3), shmem_cache(3)
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