/*D
   MPI_Neighbor_allgatherv - The vector variant of MPI_Neighbor_allgather.

Synopsis:
.vb
int MPI_Neighbor_allgatherv(const void *sendbuf, int sendcount,
                            MPI_Datatype sendtype, void *recvbuf,
                            const int recvcounts[], const int displs[],
                            MPI_Datatype recvtype, MPI_Comm comm)
.ve
.vb
int MPI_Neighbor_allgatherv_c(const void *sendbuf, MPI_Count sendcount,
                              MPI_Datatype sendtype, void *recvbuf,
                              const MPI_Count recvcounts[],
                              const MPI_Aint displs[], MPI_Datatype recvtype,
                              MPI_Comm comm)
.ve

Input Parameters:
+ sendbuf - starting address of send buffer (choice)
. sendcount - number of elements sent to each neighbor (non-negative integer)
. sendtype - data type of send buffer elements (handle)
. recvcounts - non-negative integer array (of length indegree) containing the number of elements that are received from each neighbor (non-negative integer)
. displs - integer array (of length indegree). Entry i specifies the displacement (relative to recvbuf) at which to place the incoming data from neighbor i (integer)
. recvtype - data type of receive buffer elements (handle)
- comm - communicator with topology structure (handle)

Output Parameters:
. recvbuf - starting address of receive buffer (choice)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_BUFFER
.N MPI_ERR_COMM
.N MPI_ERR_COUNT
.N MPI_ERR_TYPE
.N MPI_ERR_OTHER

D*/

