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

/*

 *  (C) 2010 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

/*

=== BEGIN_MPI_T_CVAR_INFO_BLOCK ===

cvars:

    - name        : MPIR_CVAR_IALLTOALLW_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 ialltoallw algorithm

        auto              - Internal algorithm selection

        blocked           - Force blocked algorithm

        inplace           - Force inplace algorithm

        pairwise_exchange - Force pairwise exchange algorithm

    - name        : MPIR_CVAR_IALLTOALLW_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 ialltoallw algorithm

        auto - Internal algorithm selection

    - name        : MPIR_CVAR_IALLTOALLW_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_Ialltoallw 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 ialltoallw function will not be

        called.

=== END_MPI_T_CVAR_INFO_BLOCK ===

*/

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Ialltoallw = PMPI_Ialltoallw

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Ialltoallw  MPI_Ialltoallw

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Ialltoallw as PMPI_Ialltoallw

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Ialltoallw(const void *sendbuf, const int sendcounts[], const int sdispls[],

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

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

                   MPI_Request * request) __attribute__ ((weak, alias("PMPI_Ialltoallw")));

#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_Ialltoallw

#define MPI_Ialltoallw PMPI_Ialltoallw

#undef FUNCNAME

#define FUNCNAME MPIR_Ialltoallw_sched_intra_auto

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

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

                                     const int sdispls[], const MPI_Datatype sendtypes[],

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

                                     const MPI_Datatype recvtypes[], MPIR_Comm * comm_ptr,

                                     MPIR_Sched_t s)

{

    int mpi_errno = MPI_SUCCESS;

    if (sendbuf == MPI_IN_PLACE) {

        mpi_errno = MPIR_Ialltoallw_sched_intra_inplace(sendbuf, sendcounts, sdispls,

                                                        sendtypes, recvbuf, recvcounts,

                                                        rdispls, recvtypes, comm_ptr, s);

    } else {

        mpi_errno = MPIR_Ialltoallw_sched_intra_blocked(sendbuf, sendcounts, sdispls,

                                                        sendtypes, recvbuf, recvcounts,

                                                        rdispls, recvtypes, comm_ptr, s);

    }

    return mpi_errno;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ialltoallw_sched_inter_auto

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

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

                                     const int sdispls[], const MPI_Datatype sendtypes[],

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

                                     const MPI_Datatype recvtypes[], MPIR_Comm * comm_ptr,

                                     MPIR_Sched_t s)

{

    int mpi_errno = MPI_SUCCESS;

    mpi_errno = MPIR_Ialltoallw_sched_inter_pairwise_exchange(sendbuf, sendcounts, sdispls,

                                                              sendtypes, recvbuf, recvcounts,

                                                              rdispls, recvtypes, comm_ptr, s);

    return mpi_errno;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ialltoallw_sched_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ialltoallw_sched_impl(const void *sendbuf, const int sendcounts[], const int sdispls[],

                               const MPI_Datatype sendtypes[], void *recvbuf,

                               const int recvcounts[], const int 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) {

        /* intracommunicator */

        switch (MPIR_Ialltoallw_intra_algo_choice) {

            case MPIR_IALLTOALLW_INTRA_ALGO_BLOCKED:

                mpi_errno = MPIR_Ialltoallw_sched_intra_blocked(sendbuf, sendcounts, sdispls,

                                                                sendtypes, recvbuf, recvcounts,

                                                                rdispls, recvtypes, comm_ptr, s);

                break;

            case MPIR_IALLTOALLW_INTRA_ALGO_INPLACE:

                mpi_errno = MPIR_Ialltoallw_sched_intra_inplace(sendbuf, sendcounts, sdispls,

                                                                sendtypes, recvbuf, recvcounts,

                                                                rdispls, recvtypes, comm_ptr, s);

                break;

            case MPIR_IALLTOALLW_INTRA_ALGO_AUTO:

                MPL_FALLTHROUGH;

            default:

                mpi_errno = MPIR_Ialltoallw_sched_intra_auto(sendbuf, sendcounts, sdispls,

                                                             sendtypes, recvbuf, recvcounts,

                                                             rdispls, recvtypes, comm_ptr, s);

                break;

        }

    } else {

        /* intercommunicator */

        switch (MPIR_Ialltoallw_inter_algo_choice) {

            case MPIR_IALLTOALLW_INTER_ALGO_PAIRWISE_EXCHANGE:

                mpi_errno =

                    MPIR_Ialltoallw_sched_inter_pairwise_exchange(sendbuf, sendcounts, sdispls,

                                                                  sendtypes, recvbuf, recvcounts,

                                                                  rdispls, recvtypes, comm_ptr, s);

                break;

            case MPIR_IALLTOALLW_INTER_ALGO_AUTO:

                MPL_FALLTHROUGH;

            default:

                mpi_errno = MPIR_Ialltoallw_sched_inter_auto(sendbuf, sendcounts, sdispls,

                                                             sendtypes, recvbuf, recvcounts,

                                                             rdispls, recvtypes, comm_ptr, s);

                break;

        }

    }

    return mpi_errno;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ialltoallw_sched

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ialltoallw_sched(const void *sendbuf, const int sendcounts[], const int sdispls[],

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

                          const int rdispls[], const MPI_Datatype recvtypes[],

                          MPIR_Comm * comm_ptr, MPIR_Sched_t s)

{

    int mpi_errno = MPI_SUCCESS;

    if (MPIR_CVAR_IALLTOALLW_DEVICE_COLLECTIVE && MPIR_CVAR_DEVICE_COLLECTIVES) {

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

                                          recvcounts, rdispls, recvtypes, comm_ptr, s);

    } else {

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

                                               recvcounts, rdispls, recvtypes, comm_ptr, s);

    }

    return mpi_errno;

}

#undef FUNCNAME

#define FUNCNAME MPIR_Ialltoallw_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ialltoallw_impl(const void *sendbuf, const int sendcounts[], const int sdispls[],

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

                         const int 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_Ialltoallw_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_Ialltoallw

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Ialltoallw(const void *sendbuf, const int sendcounts[], const int sdispls[],

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

                    const int rdispls[], const MPI_Datatype recvtypes[], MPIR_Comm * comm_ptr,

                    MPIR_Request ** request)

{

    int mpi_errno = MPI_SUCCESS;

    if (MPIR_CVAR_IALLTOALLW_DEVICE_COLLECTIVE && MPIR_CVAR_DEVICE_COLLECTIVES) {

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

                                    recvcounts, rdispls, recvtypes, comm_ptr, request);

    } else {

        mpi_errno = MPIR_Ialltoallw_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_Ialltoallw

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

MPI_Ialltoallw - Nonblocking generalized all-to-all communication allowing

   different datatypes, counts, and displacements for each partner

Input Parameters:

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

. sendcounts - non-negative integer array (of length group size) specifying the number of elements to send to each processor

. sdispls - integer array (of length group size). Entry j specifies the displacement relative to sendbuf from which to take the outgoing data destined for process j

. sendtypes - array of datatypes (of length group size). Entry j specifies the type of data to send to process j (array of handles)

. recvcounts - non-negative integer array (of length group size) specifying the number of elements that can be received from each processor

. rdispls - integer array (of length group size). Entry i specifies the displacement relative to recvbuf at which to place the incoming data from process i

. recvtypes - array of datatypes (of length group size). Entry i specifies the type of data received from process i (array of handles)

- comm - communicator (handle)

Output Parameters:

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

- request - communication request (handle)

.N ThreadSafe

.N Fortran

.N Errors

@*/

int MPI_Ialltoallw(const void *sendbuf, const int sendcounts[], const int sdispls[],

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

                   const int 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_IALLTOALLW);

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_IALLTOALLW);

    /* 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);

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

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, FALSE);

            if (mpi_errno != MPI_SUCCESS)

                goto fn_fail;

            if (sendbuf != MPI_IN_PLACE) {

                MPIR_ERRTEST_ARGNULL(sendcounts, "sendcounts", mpi_errno);

                MPIR_ERRTEST_ARGNULL(sdispls, "sdispls", mpi_errno);

                MPIR_ERRTEST_ARGNULL(sendtypes, "sendtypes", mpi_errno);

                if (comm_ptr->comm_kind == MPIR_COMM_KIND__INTRACOMM &&

                    sendcounts == recvcounts && sendtypes == recvtypes)

                    MPIR_ERRTEST_ALIAS_COLL(sendbuf, recvbuf, mpi_errno);

            }

            MPIR_ERRTEST_ARGNULL(recvcounts, "recvcounts", mpi_errno);

            MPIR_ERRTEST_ARGNULL(rdispls, "rdispls", mpi_errno);

            MPIR_ERRTEST_ARGNULL(recvtypes, "recvtypes", mpi_errno);

            if (comm_ptr->comm_kind == MPIR_COMM_KIND__INTERCOMM && sendbuf == MPI_IN_PLACE) {

                MPIR_ERR_SETANDJUMP(mpi_errno, MPI_ERR_OTHER, "**sendbuf_inplace");

            }

            MPIR_ERRTEST_ARGNULL(request, "request", mpi_errno);

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

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    mpi_errno = MPIR_Ialltoallw(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_IALLTOALLW);

    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_ialltoallw",

                                 "**mpi_ialltoallw %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(comm_ptr, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}