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

/*

 *

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Rsend = PMPI_Rsend

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Rsend  MPI_Rsend

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Rsend as PMPI_Rsend

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Rsend(const void *buf, int count, MPI_Datatype datatype, int dest, int tag,

              MPI_Comm comm) __attribute__ ((weak, alias("PMPI_Rsend")));

#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_Rsend

#define MPI_Rsend PMPI_Rsend

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Rsend

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

    MPI_Rsend - Blocking ready send

Input Parameters:

+ buf - initial address of send buffer (choice)

. count - number of elements in send buffer (nonnegative integer)

. datatype - datatype of each send buffer element (handle)

. dest - rank of destination (integer)

. tag - message tag (integer)

- comm - communicator (handle)

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_COMM

.N MPI_ERR_COUNT

.N MPI_ERR_TYPE

.N MPI_ERR_TAG

.N MPI_ERR_RANK

@*/

int MPI_Rsend(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_Comm *comm_ptr = NULL;

    MPIR_Request *request_ptr = NULL;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_RSEND);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_PT2PT_ENTER_FRONT(MPID_STATE_MPI_RSEND);

    /* Validate handle parameters needing to be converted */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_COMM(comm, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI object handles to object pointers */

    MPIR_Comm_get_ptr(comm, comm_ptr);

    /* Validate parameters if error checking is enabled */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, FALSE);

            if (mpi_errno)

                goto fn_fail;

            MPIR_ERRTEST_COUNT(count, mpi_errno);

            MPIR_ERRTEST_SEND_RANK(comm_ptr, dest, mpi_errno);

            MPIR_ERRTEST_SEND_TAG(tag, mpi_errno);

            /* Validate datatype handle */

            MPIR_ERRTEST_DATATYPE(datatype, "datatype", mpi_errno);

            /* Validate datatype object */

            if (HANDLE_GET_KIND(datatype) != HANDLE_KIND_BUILTIN) {

                MPIR_Datatype *datatype_ptr = NULL;

                MPIR_Datatype_get_ptr(datatype, datatype_ptr);

                MPIR_Datatype_valid_ptr(datatype_ptr, mpi_errno);

                if (mpi_errno)

                    goto fn_fail;

                MPIR_Datatype_committed_ptr(datatype_ptr, mpi_errno);

                if (mpi_errno)

                    goto fn_fail;

            }

            /* Validate buffer */

            MPIR_ERRTEST_USERBUFFER(buf, count, datatype, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    mpi_errno = MPID_Rsend(buf, count, datatype, dest, tag, comm_ptr,

                           MPIR_CONTEXT_INTRA_PT2PT, &request_ptr);

    if (mpi_errno != MPI_SUCCESS)

        goto fn_fail;

    if (request_ptr == NULL) {

        goto fn_exit;

    }

    /* If a request was returned, then we need to block until the request

     * is complete */

    mpi_errno = MPID_Wait(request_ptr, MPI_STATUS_IGNORE);

    if (mpi_errno)

        MPIR_ERR_POP(mpi_errno);

    mpi_errno = request_ptr->status.MPI_ERROR;

    MPIR_Request_free(request_ptr);

    if (mpi_errno != MPI_SUCCESS)

        goto fn_fail;

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

  fn_exit:

    MPIR_FUNC_TERSE_PT2PT_EXIT(MPID_STATE_MPI_RSEND);

    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_rsend", "**mpi_rsend %p %d %D %i %t %C", buf, count,

                                 datatype, dest, tag, comm);

    }

#endif

    mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}