---
name: "shmem_longlong_inc.openmpi"
section: "3"
platform: "linux"
package: "openmpi-doc"
version: "5.0.7-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/shmem_longlong_inc.openmpi"
---

# shmem\_longlong\_inc.openmpi(3)

shmem\_int4\_inc(3), shmem\_int8\_inc(3), [*shmem\_int\_inc*(3)](/shmem_int_inc/3.md), [*shmem\_long\_inc*(3)](/shmem_long_inc/3.md), [*shmem\_longlong\_inc*(3)](/shmem_longlong_inc/3.md) - These routines perform an atomic increment operation on a remote data object.

## SYNOPSIS

C or C++:

```
#include <mpp/shmem.h>
int shmem_int_inc(int *target, int pe)
long shmem_long_inc(long *target, int pe)
long long shmem_longlong_inc(long long *target, int pe)
```

Fortran:

```
INCLUDE "mpp/shmem.fh"
INTEGER pe
INTEGER(KIND=4) SHMEM_INT4_INC, target4
INTEGER(KIND=8) SHMEM_INT8_INC, target8
ires4 = SHMEM_INT4_INC(target4, pe)
ires8 = SHMEM_INT8_INC(target8, pe)
```

## DESCRIPTION

The atomic increment routines replace the value of **target** with its value incremented 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:

- **target**

  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.

- **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)](/intro_shmem/3.md).

## RETURN VALUES

None.

**SEE ALSO:**

[*intro\_shmem*(3)](/intro_shmem/3.md)

## COPYRIGHT

2003-2025, The Open MPI Community