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SHMEM_LONG_FINC(3) Open MPI SHMEM_LONG_FINC(3)


shmem_int4_finc(3), shmem_int8_finc(3), shmem_int_finc(3), shmem_long_finc(3), shmem_longlong_finc(3) - Performs an atomic fetch-and-increment operation on a remote data object

SYNOPSIS

C or C++:

#include <mpp/shmem.h>
int shmem_int_finc(int *target, int pe)
long shmem_long_finc(long *target, int pe)
long long shmem_longlong_finc(long long *target, int pe)


Fortran:

INCLUDE "mpp/shmem.fh"
INTEGER pe
INTEGER(KIND=4) SHMEM_INT4_FINC, target4
INTEGER(KIND=8) SHMEM_INT8_FINC, target8
ires4 = SHMEM_INT4_FINC(target4, pe)
ires8 = SHMEM_INT8_FINC(target8, pe)


DESCRIPTION

The fetch and increment routines retrieve the value at address target on PE pe, and update target with the result of incrementing the retrieved value by one. The operation must be completed without the possibility of another process updating target between the time of the fetch and the update.

The arguments are as follows:

The remotely accessible integer data object to be updated on the remote PE. The type of target should match that implied in the SYNOPSIS section.
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).

RETURN VALUES

The contents that had been at the target address on the remote PE prior to the increment.

SEE ALSO:

intro_shmem(3)


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December 2, 2024