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

/*

 *  (C) 2011 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Imrecv = PMPI_Imrecv

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Imrecv  MPI_Imrecv

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Imrecv as PMPI_Imrecv

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Imrecv(void *buf, int count, MPI_Datatype datatype, MPI_Message *message,

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

#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_Imrecv

#define MPI_Imrecv PMPI_Imrecv

/* any non-MPI functions go here, especially non-static ones */

#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME

#define FUNCNAME MPI_Imrecv

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

MPI_Imrecv - Nonblocking receive of message matched by MPI_Mprobe or MPI_Improbe.

Input/Output Parameters:

. message - message (handle)

Input Parameters:

+ count - number of elements in the receive buffer (non-negative integer)

- datatype - datatype of each receive buffer element (handle)

Output Parameters:

+ buf - initial address of the receive buffer (choice)

- request - communication request (handle)

.N ThreadSafe

.N Fortran

.N Errors

@*/

int MPI_Imrecv(void *buf, int count, MPI_Datatype datatype, MPI_Message *message, MPI_Request *request)

{

    int mpi_errno = MPI_SUCCESS;

    MPID_Request *rreq = NULL;

    MPID_Request *msgp = NULL;

    MPID_MPI_STATE_DECL(MPID_STATE_MPI_IMRECV);

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_IMRECV);

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

#   ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS

        {

            MPIR_ERRTEST_DATATYPE(datatype, "datatype", mpi_errno);

            /* TODO more checks may be appropriate */

        }

        MPID_END_ERROR_CHECKS

    }

#   endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI object handles to object pointers */

    MPID_Request_get_ptr(*message, msgp);

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

#   ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS

        {

            if (HANDLE_GET_KIND(datatype) != HANDLE_KIND_BUILTIN) {

                MPID_Datatype *datatype_ptr = NULL;

                MPID_Datatype_get_ptr(datatype, datatype_ptr);

                MPID_Datatype_valid_ptr(datatype_ptr, mpi_errno);

                if (mpi_errno != MPI_SUCCESS) goto fn_fail;

                MPID_Datatype_committed_ptr(datatype_ptr, mpi_errno);

                if (mpi_errno != MPI_SUCCESS) goto fn_fail;

            }

            /* MPI_MESSAGE_NO_PROC should yield a "proc null" status */

            if (*message != MPI_MESSAGE_NO_PROC) {

                MPID_Request_valid_ptr(msgp, mpi_errno);

                if (mpi_errno) MPIR_ERR_POP(mpi_errno);

                MPIR_ERR_CHKANDJUMP((msgp->kind != MPID_REQUEST_MPROBE),

                                     mpi_errno, MPI_ERR_ARG, "**reqnotmsg");

            }

            MPIR_ERRTEST_ARGNULL(request, "request", mpi_errno);

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

        }

        MPID_END_ERROR_CHECKS

    }

#   endif /* HAVE_ERROR_CHECKING */

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

    mpi_errno = MPID_Imrecv(buf, count, datatype, msgp, &rreq);

    if (mpi_errno) MPIR_ERR_POP(mpi_errno);

    MPIU_Assert(rreq != NULL);

    *request = rreq->handle;

    *message = MPI_MESSAGE_NULL;

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

fn_exit:

    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_IMRECV);

    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_imrecv", "**mpi_imrecv %p %d %D %p %p", buf, count, datatype, message, request);

    }

#   endif

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}