shmem_atomic_fetch_add_nbi
The nonblocking atomic routine performs an atomic fetch-and-add operation on
a remote data object.
Definitions
C11 Synopsis
void shmem_atomic_fetch_add_nbi(TYPE *fetch, TYPE *dest, TYPE value, int pe);
void shmem_atomic_fetch_add_nbi(shmem_ctx_t ctx, TYPE *fetch, TYPE *dest,
TYPE value, int pe);
where TYPE is one of the standard AMO types specified by Table:6
C/C++ Synopsis
void shmem_TYPENAME_atomic_fetch_add_nbi(TYPE *fetch, TYPE *dest, TYPE value,
int pe);
void shmem_ctx_TYPENAME_atomic_fetch_add_nbi(shmem_ctx_t ctx, TYPE *fetch,
TYPE *dest, TYPE value, int pe);
where TYPE is one of the standard AMO types and has a corresponding TYPENAME specified by Table:6
Datatype Reference Table
Table:6
| TYPE | TYPENAME |
|-------------------------|---------------------|
| int | int |
| long | long |
| long long | longlong |
| unsigned int | uint |
| unsigned long | ulong |
| unsigned long long | ulonglong |
| int32_t | int32 |
| int64_t | int64 |
| uint32_t | uint32 |
| uint64_t | uint64 |
| size_t | size |
| ptrdiff_t | ptrdiff |
Arguments
ctx The context on which to perform the operation. When this argument is
not provided, the operation is performed on SHMEM_CTX_DEFAULT.
fetch Local address of data object to be updated. The type of fetch should
match that implied in the SYNOPSIS section.
dest Symmetric address of the destination data object. The type of dest
should match that implied in the SYNOPSIS section.
value The operand to the atomic fetch-and-add operation. The type of value
should match that implied in the SYNOPSIS section.
pe An integer that indicates the PE number on which dest is to be
updated. When using Fortran, it must be a default integer value.
Description
The nonblocking shmem_atomic_fetch_add_nbi routines perform an atomic
fetch-and-add operation. This routine returns after initiating the operation.
An atomic fetch-and-add operation fetches the old dest and adds value to
dest without the possibility of another atomic operation on the dest between
the time of the fetch and the update. This routine returns after initiating
the operation. The operation is considered complete after a subsequent call
to shmem_quiet. At the completion of shmem_quiet, value has been added to
dest on pe and the prior contents of dest fetched into the fetch local data
object.
Return Values
None.
Notes
None.