+ static int scan(const void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm);
+ static int exscan(const void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm);
+ static int alltoallw
+ (const void* sendbuf, const int* sendcounts, const int* senddisps, const MPI_Datatype* sendtypes, void* recvbuf, const int* recvcounts,
+ const int* recvdisps, const MPI_Datatype* recvtypes, MPI_Comm comm);
+
+ //async collectives
+ static int ibarrier(MPI_Comm comm, MPI_Request* request);
+ static int ibcast(void *buf, int count, MPI_Datatype datatype,
+ int root, MPI_Comm comm, MPI_Request* request);
+ static int igather (const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int recvcount,
+ MPI_Datatype recvtype, int root, MPI_Comm comm, MPI_Request *request);
+ static int igatherv (const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf,
+ const int* recvcounts, const int* displs, MPI_Datatype recvtype, int root, MPI_Comm comm, MPI_Request *request);
+ static int iallgather (const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf,
+ int recvcount, MPI_Datatype recvtype, MPI_Comm comm, MPI_Request *request);
+ static int iallgatherv (const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf,
+ const int* recvcounts, const int* displs, MPI_Datatype recvtype, MPI_Comm comm, MPI_Request *request);
+ static int iscatter (const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf,
+ int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm, MPI_Request *request);
+ static int iscatterv (const void* sendbuf, const int* sendcounts, const int* displs, MPI_Datatype sendtype,
+ void* recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm, MPI_Request *request);
+ static int ireduce
+ (const void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, int root, MPI_Comm comm, MPI_Request *request);
+ static int iallreduce
+ (const void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm, MPI_Request *request);
+ static int iscan
+ (const void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm, MPI_Request *request);
+ static int iexscan
+ (const void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm, MPI_Request *request);
+ static int ireduce_scatter
+ (const void* sendbuf, void* recvbuf, const int* recvcounts, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm, MPI_Request *request);
+ static int ireduce_scatter_block
+ (const void* sendbuf, void* recvbuf, int recvcount, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm, MPI_Request *request);
+ static int ialltoall (const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf,
+ int recvcount, MPI_Datatype recvtype, MPI_Comm comm, MPI_Request *request);
+ static int ialltoallv
+ (const void* sendbuf, const int* sendcounts, const int* senddisps, MPI_Datatype sendtype, void* recvbuf, const int* recvcounts,
+ const int* recvdisps, MPI_Datatype recvtype, MPI_Comm comm, MPI_Request *request);
+ static int ialltoallw
+ (const void* sendbuf, const int* sendcounts, const int* senddisps, const MPI_Datatype* sendtypes, void* recvbuf, const int* recvcounts,
+ const int* recvdisps, const MPI_Datatype* recvtypes, MPI_Comm comm, MPI_Request *request);
+