/* -*- 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_Type_create_indexed_block */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Type_create_indexed_block = PMPI_Type_create_indexed_block
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Type_create_indexed_block MPI_Type_create_indexed_block
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Type_create_indexed_block as PMPI_Type_create_indexed_block
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Type_create_indexed_block(int count, int blocklength, const int array_of_displacements[],
MPI_Datatype oldtype, MPI_Datatype * newtype)
__attribute__ ((weak, alias("PMPI_Type_create_indexed_block")));
#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_Type_create_indexed_block
#define MPI_Type_create_indexed_block PMPI_Type_create_indexed_block
#undef FUNCNAME
#define FUNCNAME MPIR_Type_create_indexed_block_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Type_create_indexed_block_impl(int count,
int blocklength,
const int array_of_displacements[],
MPI_Datatype oldtype, MPI_Datatype * newtype)
{
int mpi_errno = MPI_SUCCESS;
MPIR_CHKLMEM_DECL(1);
MPI_Datatype new_handle;
MPIR_Datatype *new_dtp;
int i, *ints;
mpi_errno = MPIR_Type_blockindexed(count, blocklength, array_of_displacements, 0, /* dispinbytes */
oldtype, &new_handle);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
MPIR_CHKLMEM_MALLOC_ORJUMP(ints, int *, (count + 2) * sizeof(int), mpi_errno,
"content description", MPL_MEM_BUFFER);
ints[0] = count;
ints[1] = blocklength;
for (i = 0; i < count; i++)
ints[i + 2] = array_of_displacements[i];
MPIR_Datatype_get_ptr(new_handle, new_dtp);
mpi_errno = MPIR_Datatype_set_contents(new_dtp, MPI_COMBINER_INDEXED_BLOCK, count + 2, /* ints */
0, /* aints */
1, /* types */
ints, NULL, &oldtype);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
MPIR_OBJ_PUBLISH_HANDLE(*newtype, new_handle);
fn_exit:
MPIR_CHKLMEM_FREEALL();
return mpi_errno;
fn_fail:
goto fn_exit;
}
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Type_create_indexed_block
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Type_create_indexed_block - Create an indexed
datatype with constant-sized blocks
Input Parameters:
+ count - length of array of displacements (integer)
. blocklength - size of block (integer)
. array_of_displacements - array of displacements (array of integer)
- oldtype - old datatype (handle)
Output Parameters:
. newtype - new datatype (handle)
Notes:
The indices are displacements, and are based on a zero origin. A common error
is to do something like the following
.vb
integer a(100)
integer blens(10), indices(10)
do i=1,10
10 indices(i) = 1 + (i-1)*10
call MPI_TYPE_CREATE_INDEXED_BLOCK(10,1,indices,MPI_INTEGER,newtype,ierr)
call MPI_TYPE_COMMIT(newtype,ierr)
call MPI_SEND(a,1,newtype,...)
.ve
expecting this to send "a(1),a(11),..." because the indices have values
"1,11,...". Because these are `displacements` from the beginning of "a",
it actually sends "a(1+1),a(1+11),...".
If you wish to consider the displacements as indices into a Fortran array,
consider declaring the Fortran array with a zero origin
.vb
integer a(0:99)
.ve
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_TYPE
.N MPI_ERR_ARG
@*/
int MPI_Type_create_indexed_block(int count,
int blocklength,
const int array_of_displacements[],
MPI_Datatype oldtype, MPI_Datatype * newtype)
{
int mpi_errno = MPI_SUCCESS;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_TYPE_CREATE_INDEXED_BLOCK);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_TYPE_CREATE_INDEXED_BLOCK);
/* Validate parameters and objects */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_Datatype *datatype_ptr = NULL;
MPIR_ERRTEST_COUNT(count, mpi_errno);
MPIR_ERRTEST_ARGNEG(blocklength, "blocklen", mpi_errno);
if (count > 0) {
MPIR_ERRTEST_ARGNULL(array_of_displacements, "indices", mpi_errno);
}
MPIR_ERRTEST_DATATYPE(oldtype, "datatype", mpi_errno);
if (HANDLE_GET_KIND(oldtype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype_get_ptr(oldtype, datatype_ptr);
MPIR_Datatype_valid_ptr(datatype_ptr, mpi_errno);
}
if (mpi_errno)
goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno = MPIR_Type_create_indexed_block_impl(count, blocklength, array_of_displacements,
oldtype, newtype);
if (mpi_errno)
goto fn_fail;
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_TYPE_CREATE_INDEXED_BLOCK);
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_type_create_indexed_block",
"**mpi_type_create_indexed_block %d %d %p %D %p", count,
blocklength, array_of_displacements, oldtype, newtype);
}
#endif
mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}