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 operation.
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 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.
NOTES¶
The term remotely accessible is defined in intro_shmem(3).
SEE ALSO¶
intro_shmem(3), shmem_cache(3)