/* -*- 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_Get_elements */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Get_elements = PMPI_Get_elements
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Get_elements MPI_Get_elements
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Get_elements as PMPI_Get_elements
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Get_elements(const MPI_Status * status, MPI_Datatype datatype, int *count)
__attribute__ ((weak, alias("PMPI_Get_elements")));
#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_Get_elements
#define MPI_Get_elements PMPI_Get_elements
/* any non-MPI functions go here, especially non-static ones */
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Get_elements
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Get_elements - Returns the number of basic elements
in a datatype
Input Parameters:
+ status - return status of receive operation (Status)
- datatype - datatype used by receive operation (handle)
Output Parameters:
. count - number of received basic elements (integer)
Notes:
If the size of the datatype is zero and the amount of data returned as
determined by 'status' is also zero, this routine will return a count of
zero. This is consistent with a clarification made by the MPI Forum.
.N Fortran
.N Errors
.N MPI_SUCCESS
@*/
int MPI_Get_elements(const MPI_Status * status, MPI_Datatype datatype, int *count)
{
int mpi_errno = MPI_SUCCESS;
MPI_Count count_x, byte_count;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_GET_ELEMENTS);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_GET_ELEMENTS);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_DATATYPE(datatype, "datatype", mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif
/* Validate parameters and objects (post conversion) */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_Datatype *datatype_ptr = NULL;
MPIR_ERRTEST_ARGNULL(status, "status", mpi_errno);
MPIR_ERRTEST_ARGNULL(count, "count", mpi_errno);
/* Convert MPI object handles to object pointers */
MPIR_Datatype_get_ptr(datatype, datatype_ptr);
/* Validate datatype_ptr */
if (HANDLE_GET_KIND(datatype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype_get_ptr(datatype, datatype_ptr);
MPIR_Datatype_valid_ptr(datatype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
MPIR_Datatype_committed_ptr(datatype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
}
}
MPID_END_ERROR_CHECKS;
}
#endif
/* ... body of routine ... */
byte_count = MPIR_STATUS_GET_COUNT(*status);
mpi_errno = MPIR_Get_elements_x_impl(&byte_count, datatype, &count_x);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* clip the value if it cannot be correctly returned to the user */
*count = (count_x > INT_MAX) ? MPI_UNDEFINED : (int) count_x;
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_GET_ELEMENTS);
return mpi_errno;
/* --BEGIN ERROR HANDLING-- */
fn_fail:
{
mpi_errno =
MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
"**mpi_get_elements", "**mpi_get_elements %p %D %p", status,
datatype, count);
}
mpi_errno = MPIR_Err_return_comm(0, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}