SHMEM_ADD(3) Open MPI SHMEM_ADD(3)
NAME
shmem_int_add(3), shmem_int4_add(3), shmem_int8_add(3),
shmem_long_add(3), shmem_longlong_add(3) - Performs an atomic add oper-
ation.
SYNOPSIS
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)
DESCRIPTION
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 SYNOP-
SIS section. If you are using Fortran, it must be of type inte-
ger 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 inte-
ger value.
NOTES
The term remotely accessible is defined in intro_shmem(3).
SEE ALSO
intro_shmem(3), shmem_cache(3)
4.1.2 Nov 24, 2021 SHMEM_ADD(3)
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