/* -*- 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_Status_set_elements_x */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Status_set_elements_x = PMPI_Status_set_elements_x
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Status_set_elements_x  MPI_Status_set_elements_x
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Status_set_elements_x as PMPI_Status_set_elements_x
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Status_set_elements_x(MPI_Status *status, MPI_Datatype datatype, MPI_Count count) __attribute__((weak,alias("PMPI_Status_set_elements_x")));
#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_Status_set_elements_x
#define MPI_Status_set_elements_x PMPI_Status_set_elements_x

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

#undef FUNCNAME
#define FUNCNAME MPIR_Status_set_elements_x_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Status_set_elements_x_impl(MPI_Status *status, MPI_Datatype datatype, MPI_Count count)
{
    int mpi_errno = MPI_SUCCESS;
    MPI_Count size_x;

    MPID_Datatype_get_size_macro(datatype, size_x);

    /* overflow check, should probably be a real error check? */
    if (count != 0) {
        MPIU_Assert(size_x >= 0 && count > 0);
        MPIU_Assert(count * size_x < MPIR_COUNT_MAX);
    }

    MPIR_STATUS_SET_COUNT(*status, size_x * count);

    return mpi_errno;
}

#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME
#define FUNCNAME MPI_Status_set_elements_x
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Status_set_elements_x - XXX description here

Input/Output Parameters:
. status - status with which to associate count (Status)

Input Parameters:
+ datatype - datatype associated with count (handle)
- count - number of elements to associate with status (integer)

.N ThreadSafe

.N Fortran

.N Errors
@*/
int MPI_Status_set_elements_x(MPI_Status *status, MPI_Datatype datatype, MPI_Count count)
{
    int mpi_errno = MPI_SUCCESS;
    MPID_MPI_STATE_DECL(MPID_STATE_MPI_STATUS_SET_ELEMENTS_X);

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_STATUS_SET_ELEMENTS_X);

    /* 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 */
            if (mpi_errno != MPI_SUCCESS) goto fn_fail;
        }
        MPID_END_ERROR_CHECKS
    }
#   endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI object handles to object pointers */

    /* 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);
                MPID_Datatype_committed_ptr(datatype_ptr, 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_Status_set_elements_x_impl(status, datatype, count);
    if (mpi_errno) MPIR_ERR_POP(mpi_errno);

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

fn_exit:
    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_STATUS_SET_ELEMENTS_X);
    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_status_set_elements_x", "**mpi_status_set_elements_x %p %D %c", status, datatype, count);
    }
#   endif
    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}
