/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *  (C) 2012 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

/*

=== BEGIN_MPI_T_CVAR_INFO_BLOCK ===

cvars:

    - name        : MPIR_CVAR_INEIGHBOR_ALLTOALLW_INTRA_ALGORITHM

      category    : COLLECTIVE

      type        : string

      default     : auto

      class       : device

      verbosity   : MPI_T_VERBOSITY_USER_BASIC

      scope       : MPI_T_SCOPE_ALL_EQ

      description : |-

        Variable to select ineighbor_alltoallw algorithm

        auto   - Internal algorithm selection

        linear - Force linear algorithm

    - name        : MPIR_CVAR_INEIGHBOR_ALLTOALLW_INTER_ALGORITHM

      category    : COLLECTIVE

      type        : string

      default     : auto

      class       : device

      verbosity   : MPI_T_VERBOSITY_USER_BASIC

      scope       : MPI_T_SCOPE_ALL_EQ

      description : |-

        Variable to select ineighbor_alltoallw algorithm

        auto   - Internal algorithm selection

        linear - Force linear algorithm

    - name        : MPIR_CVAR_INEIGHBOR_ALLTOALLW_DEVICE_COLLECTIVE

      category    : COLLECTIVE

      type        : boolean

      default     : true

      class       : device

      verbosity   : MPI_T_VERBOSITY_USER_BASIC

      scope       : MPI_T_SCOPE_ALL_EQ

      description : >-

        If set to true, MPI_ineighbor_alltoallw will allow the device to override the

        MPIR-level collective algorithms. The device still has the

        option to call the MPIR-level algorithms manually.

        If set to false, the device-level ineighbor_alltoallw function will not be

        called.

=== END_MPI_T_CVAR_INFO_BLOCK ===

*/

/* -- Begin Profiling Symbol Block for routine MPI_Ineighbor_alltoallw */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Ineighbor_alltoallw = PMPI_Ineighbor_alltoallw

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Ineighbor_alltoallw  MPI_Ineighbor_alltoallw

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Ineighbor_alltoallw as PMPI_Ineighbor_alltoallw

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Ineighbor_alltoallw(const void *sendbuf, const int sendcounts[],

                            const MPI_Aint sdispls[], const MPI_Datatype sendtypes[],

                            void *recvbuf, const int recvcounts[], const MPI_Aint rdispls[],

                            const MPI_Datatype recvtypes[], MPI_Comm comm, MPI_Request * request)

    __attribute__ ((weak, alias("PMPI_Ineighbor_alltoallw")));

#endif

/* -- End Profiling Symbol Block */

/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build

   the MPI routines */

#ifndef MPICH_MPI_FROM_PMPI

#undef MPI_Ineighbor_alltoallw

#define MPI_Ineighbor_alltoallw PMPI_Ineighbor_alltoallw

#undef FUNCNAME

#define FUNCNAME MPIR_Ineighbor_alltoallw_sched_intra_auto

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ineighbor_alltoallw_sched_intra_auto(const void *sendbuf, const int sendcounts[],

                                              const MPI_Aint sdispls[],

                                              const MPI_Datatype sendtypes[], void *recvbuf,

                                              const int recvcounts[], const MPI_Aint rdispls[],

                                              const MPI_Datatype recvtypes[], MPIR_Comm * comm_ptr,

                                              MPIR_Sched_t s)

{

    int mpi_errno = MPI_SUCCESS;

    mpi_errno =

        MPIR_Ineighbor_alltoallw_sched_allcomm_linear(sendbuf, sendcounts, sdispls, sendtypes,

                                                      recvbuf, recvcounts, rdispls, recvtypes,

                                                      comm_ptr, s);

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

  fn_exit:

    return mpi_errno;

  fn_fail:

    goto fn_exit;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ineighbor_alltoallw_sched_inter_auto

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ineighbor_alltoallw_sched_inter_auto(const void *sendbuf, const int sendcounts[],

                                              const MPI_Aint sdispls[],

                                              const MPI_Datatype sendtypes[], void *recvbuf,

                                              const int recvcounts[], const MPI_Aint rdispls[],

                                              const MPI_Datatype recvtypes[], MPIR_Comm * comm_ptr,

                                              MPIR_Sched_t s)

{

    int mpi_errno = MPI_SUCCESS;

    mpi_errno =

        MPIR_Ineighbor_alltoallw_sched_allcomm_linear(sendbuf, sendcounts, sdispls, sendtypes,

                                                      recvbuf, recvcounts, rdispls, recvtypes,

                                                      comm_ptr, s);

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

  fn_exit:

    return mpi_errno;

  fn_fail:

    goto fn_exit;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ineighbor_alltoallw_sched_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ineighbor_alltoallw_sched_impl(const void *sendbuf, const int sendcounts[],

                                        const MPI_Aint sdispls[], const MPI_Datatype sendtypes[],

                                        void *recvbuf, const int recvcounts[],

                                        const MPI_Aint rdispls[], const MPI_Datatype recvtypes[],

                                        MPIR_Comm * comm_ptr, MPIR_Sched_t s)

{

    int mpi_errno = MPI_SUCCESS;

    if (comm_ptr->comm_kind == MPIR_COMM_KIND__INTRACOMM) {

        switch (MPIR_Ineighbor_alltoallw_intra_algo_choice) {

            case MPIR_INEIGHBOR_ALLTOALLW_INTRA_ALGO_LINEAR:

                mpi_errno =

                    MPIR_Ineighbor_alltoallw_sched_allcomm_linear(sendbuf, sendcounts, sdispls,

                                                                  sendtypes, recvbuf, recvcounts,

                                                                  rdispls, recvtypes, comm_ptr, s);

                break;

            case MPIR_INEIGHBOR_ALLTOALLW_INTRA_ALGO_AUTO:

                MPL_FALLTHROUGH;

            default:

                mpi_errno =

                    MPIR_Ineighbor_alltoallw_sched_intra_auto(sendbuf, sendcounts, sdispls,

                                                              sendtypes, recvbuf, recvcounts,

                                                              rdispls, recvtypes, comm_ptr, s);

                break;

        }

    } else {

        switch (MPIR_Ineighbor_alltoallw_inter_algo_choice) {

            case MPIR_INEIGHBOR_ALLTOALLW_INTER_ALGO_LINEAR:

                mpi_errno =

                    MPIR_Ineighbor_alltoallw_sched_allcomm_linear(sendbuf, sendcounts, sdispls,

                                                                  sendtypes, recvbuf, recvcounts,

                                                                  rdispls, recvtypes, comm_ptr, s);

                break;

            case MPIR_INEIGHBOR_ALLTOALLW_INTER_ALGO_AUTO:

                MPL_FALLTHROUGH;

            default:

                mpi_errno =

                    MPIR_Ineighbor_alltoallw_sched_inter_auto(sendbuf, sendcounts, sdispls,

                                                              sendtypes, recvbuf, recvcounts,

                                                              rdispls, recvtypes, comm_ptr, s);

                break;

        }

    }

    return mpi_errno;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ineighbor_alltoallw_sched

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ineighbor_alltoallw_sched(const void *sendbuf, const int sendcounts[],

                                   const MPI_Aint sdispls[], const MPI_Datatype sendtypes[],

                                   void *recvbuf, const int recvcounts[],

                                   const MPI_Aint rdispls[], const MPI_Datatype recvtypes[],

                                   MPIR_Comm * comm_ptr, MPIR_Sched_t s)

{

    int mpi_errno = MPI_SUCCESS;

    if (MPIR_CVAR_BARRIER_DEVICE_COLLECTIVE && MPIR_CVAR_DEVICE_COLLECTIVES) {

        mpi_errno = MPID_Ineighbor_alltoallw_sched(sendbuf, sendcounts, sdispls, sendtypes, recvbuf,

                                                   recvcounts, rdispls, recvtypes, comm_ptr, s);

    } else {

        mpi_errno = MPIR_Ineighbor_alltoallw_sched_impl(sendbuf, sendcounts, sdispls, sendtypes,

                                                        recvbuf, recvcounts, rdispls, recvtypes,

                                                        comm_ptr, s);

    }

    return mpi_errno;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ineighbor_alltoallw_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ineighbor_alltoallw_impl(const void *sendbuf, const int sendcounts[],

                                  const MPI_Aint sdispls[],

                                  const MPI_Datatype sendtypes[],

                                  void *recvbuf, const int recvcounts[],

                                  const MPI_Aint rdispls[],

                                  const MPI_Datatype recvtypes[],

                                  MPIR_Comm * comm_ptr, MPIR_Request ** request)

{

    int mpi_errno = MPI_SUCCESS;

    int tag = -1;

    MPIR_Sched_t s = MPIR_SCHED_NULL;

    *request = NULL;

    mpi_errno = MPIR_Sched_next_tag(comm_ptr, &tag;;

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

    mpi_errno = MPIR_Sched_create(&s);

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

    mpi_errno = MPIR_Ineighbor_alltoallw_sched(sendbuf, sendcounts, sdispls, sendtypes,

                                               recvbuf, recvcounts, rdispls, recvtypes,

                                               comm_ptr, s);

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

    mpi_errno = MPIR_Sched_start(&s, comm_ptr, tag, request);

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

  fn_exit:

    return mpi_errno;

  fn_fail:

    goto fn_exit;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ineighbor_alltoallw

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ineighbor_alltoallw(const void *sendbuf, const int sendcounts[],

                             const MPI_Aint sdispls[],

                             const MPI_Datatype sendtypes[], void *recvbuf,

                             const int recvcounts[], const MPI_Aint rdispls[],

                             const MPI_Datatype recvtypes[],

                             MPIR_Comm * comm_ptr, MPIR_Request ** request)

{

    int mpi_errno = MPI_SUCCESS;

    if (MPIR_CVAR_BARRIER_DEVICE_COLLECTIVE && MPIR_CVAR_DEVICE_COLLECTIVES) {

        mpi_errno = MPID_Ineighbor_alltoallw(sendbuf, sendcounts, sdispls, sendtypes, recvbuf,

                                             recvcounts, rdispls, recvtypes, comm_ptr, request);

    } else {

        mpi_errno = MPIR_Ineighbor_alltoallw_impl(sendbuf, sendcounts, sdispls, sendtypes, recvbuf,

                                                  recvcounts, rdispls, recvtypes, comm_ptr,

                                                  request);

    }

    return mpi_errno;

}

#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME

#define FUNCNAME MPI_Ineighbor_alltoallw

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

MPI_Ineighbor_alltoallw - Nonblocking version of MPI_Neighbor_alltoallw.

Input Parameters:

+ sendbuf - starting address of the send buffer (choice)

. sendcounts - non-negative integer array (of length outdegree) specifying the number of elements to send to each neighbor

. sdispls - integer array (of length outdegree).  Entry j specifies the displacement in bytes (relative to sendbuf) from which to take the outgoing data destined for neighbor j (array of integers)

. sendtypes - array of datatypes (of length outdegree).  Entry j specifies the type of data to send to neighbor j (array of handles)

. recvcounts - non-negative integer array (of length indegree) specifying the number of elements that are received from each neighbor

. rdispls - integer array (of length indegree).  Entry i specifies the displacement in bytes (relative to recvbuf) at which to place the incoming data from neighbor i (array of integers).

. recvtypes - array of datatypes (of length indegree).  Entry i specifies the type of data received from neighbor i (array of handles).

- comm - communicator with topology structure (handle)

Output Parameters:

+ recvbuf - starting address of the receive buffer (choice)

- request - communication request (handle)

.N ThreadSafe

.N Fortran

.N Errors

@*/

int MPI_Ineighbor_alltoallw(const void *sendbuf, const int sendcounts[], const MPI_Aint sdispls[],

                            const MPI_Datatype sendtypes[], void *recvbuf, const int recvcounts[],

                            const MPI_Aint rdispls[], const MPI_Datatype recvtypes[], MPI_Comm comm,

                            MPI_Request * request)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_Comm *comm_ptr = NULL;

    MPIR_Request *request_ptr = NULL;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_INEIGHBOR_ALLTOALLW);

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_INEIGHBOR_ALLTOALLW);

    /* Validate parameters, especially handles needing to be converted */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_COMM(comm, mpi_errno);

            /* TODO more checks may be appropriate */

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI object handles to object pointers */

    MPIR_Comm_get_ptr(comm, comm_ptr);

    MPIR_Assert(comm_ptr != NULL);

    /* Validate parameters and objects (post conversion) */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, FALSE);

            MPIR_ERRTEST_ARGNULL(request, "request", mpi_errno);

            /* TODO more checks may be appropriate (counts, in_place, buffer aliasing, etc) */

            if (mpi_errno != MPI_SUCCESS)

                goto fn_fail;

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */

    mpi_errno =

        MPIR_Ineighbor_alltoallw(sendbuf, sendcounts, sdispls, sendtypes, recvbuf, recvcounts,

                                 rdispls, recvtypes, comm_ptr, &request_ptr);

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

    /* create a complete request, if needed */

    if (!request_ptr)

        request_ptr = MPIR_Request_create_complete(MPIR_REQUEST_KIND__COLL);

    /* return the handle of the request to the user */

    *request = request_ptr->handle;

    /* ... end of body of routine ... */

  fn_exit:

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_INEIGHBOR_ALLTOALLW);

    MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    return mpi_errno;

  fn_fail:

    /* --BEGIN ERROR HANDLING-- */

#ifdef HAVE_ERROR_CHECKING

    {

        mpi_errno =

            MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,

                                 "**mpi_ineighbor_alltoallw",

                                 "**mpi_ineighbor_alltoallw %p %p %p %p %p %p %p %p %C %p", sendbuf,

                                 sendcounts, sdispls, sendtypes, recvbuf, recvcounts, rdispls,

                                 recvtypes, comm, request);

    }

#endif

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}