/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University.
 *                         All rights reserved.
 * Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
 *                         All rights reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */

#include "ompi_config.h"

#include "mpi.h"
#include "mpi/c/bindings.h"
#include "mca/pml/pml.h"


#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Irecv = PMPI_Irecv
#endif

#if OMPI_PROFILING_DEFINES
#include "mpi/c/profile/defines.h"
#endif

static const char FUNC_NAME[] = "MPI_Irecv";


int MPI_Irecv(void *buf, int count, MPI_Datatype type, int source,
              int tag, MPI_Comm comm, MPI_Request *request) 
{
    int rc;
    if (source == MPI_PROC_NULL) {
        *request = &ompi_request_empty;
        return OMPI_SUCCESS;
    }

    if ( MPI_PARAM_CHECK ) {
        rc = MPI_SUCCESS;
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
        if (ompi_comm_invalid(comm)) {
            return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM, FUNC_NAME);
        } else if (count < 0) {
            rc = MPI_ERR_COUNT;
        } else if (type == MPI_DATATYPE_NULL) {
            rc = MPI_ERR_TYPE;
        } else if (((tag < 0) && (tag != MPI_ANY_TAG)) || (tag > mca_pml.pml_max_tag)) {
            rc = MPI_ERR_TAG;
        } else if (source != MPI_ANY_SOURCE && 
                   source != MPI_PROC_NULL &&  
                   ompi_comm_peer_invalid(comm, source)) {
            rc = MPI_ERR_RANK;
        }
        OMPI_ERRHANDLER_CHECK(rc, comm, rc, FUNC_NAME);
    }

    rc = MCA_PML_CALL(irecv(buf,count,type,source,tag,comm,request));
    OMPI_ERRHANDLER_RETURN(rc, comm, rc, FUNC_NAME);
}