/* -*- 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_resized */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Type_create_resized = PMPI_Type_create_resized

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Type_create_resized  MPI_Type_create_resized

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Type_create_resized as PMPI_Type_create_resized

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Type_create_resized(MPI_Datatype oldtype, MPI_Aint lb, MPI_Aint extent,

                            MPI_Datatype * newtype)

    __attribute__ ((weak, alias("PMPI_Type_create_resized")));

#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_resized

#define MPI_Type_create_resized PMPI_Type_create_resized

#endif

/* --BEGIN ERROR HANDLING-- */

static int MPII_Type_create_resized_memory_error(void)

{

    int mpi_errno;

    mpi_errno = MPIR_Err_create_code(MPI_SUCCESS,

                                     MPIR_ERR_RECOVERABLE,

                                     "MPIR_Type_create_resized",

                                     __LINE__, MPI_ERR_OTHER, "**nomem", 0);

    return mpi_errno;

}

/* --END ERROR HANDLING-- */

int MPIR_Type_create_resized(MPI_Datatype oldtype,

                             MPI_Aint lb, MPI_Aint extent, MPI_Datatype * newtype_p)

{

    MPIR_Datatype *new_dtp;

    new_dtp = (MPIR_Datatype *) MPIR_Handle_obj_alloc(&MPIR_Datatype_mem);

    /* --BEGIN ERROR HANDLING-- */

    if (!new_dtp)

        return MPII_Type_create_resized_memory_error();

    /* --END ERROR HANDLING-- */

    /* handle is filled in by MPIR_Handle_obj_alloc() */

    MPIR_Object_set_ref(new_dtp, 1);

    new_dtp->is_permanent = 0;

    new_dtp->is_committed = 0;

    new_dtp->attributes = 0;

    new_dtp->cache_id = 0;

    new_dtp->name[0] = 0;

    new_dtp->contents = 0;

    new_dtp->dataloop = NULL;

    new_dtp->dataloop_size = -1;

    new_dtp->dataloop_depth = -1;

    /* if oldtype is a basic, we build a contiguous dataloop of count = 1 */

    if (HANDLE_GET_KIND(oldtype) == HANDLE_KIND_BUILTIN) {

        int oldsize = MPIR_Datatype_get_basic_size(oldtype);

        new_dtp->size = oldsize;

        new_dtp->has_sticky_ub = 0;

        new_dtp->has_sticky_lb = 0;

        new_dtp->dataloop_depth = 1;

        new_dtp->true_lb = 0;

        new_dtp->lb = lb;

        new_dtp->true_ub = oldsize;

        new_dtp->ub = lb + extent;

        new_dtp->extent = extent;

        new_dtp->alignsize = oldsize;   /* FIXME ??? */

        new_dtp->n_builtin_elements = 1;

        new_dtp->builtin_element_size = oldsize;

        new_dtp->is_contig = (extent == oldsize) ? 1 : 0;

        new_dtp->basic_type = oldtype;

        new_dtp->max_contig_blocks = 3; /* lb, data, ub */

    } else {

        /* user-defined base type */

        MPIR_Datatype *old_dtp;

        MPIR_Datatype_get_ptr(oldtype, old_dtp);

        new_dtp->size = old_dtp->size;

        new_dtp->has_sticky_ub = 0;

        new_dtp->has_sticky_lb = 0;

        new_dtp->dataloop_depth = old_dtp->dataloop_depth;

        new_dtp->true_lb = old_dtp->true_lb;

        new_dtp->lb = lb;

        new_dtp->true_ub = old_dtp->true_ub;

        new_dtp->ub = lb + extent;

        new_dtp->extent = extent;

        new_dtp->alignsize = old_dtp->alignsize;

        new_dtp->n_builtin_elements = old_dtp->n_builtin_elements;

        new_dtp->builtin_element_size = old_dtp->builtin_element_size;

        new_dtp->basic_type = old_dtp->basic_type;

        if (extent == old_dtp->size)

            MPIR_Datatype_is_contig(oldtype, &new_dtp->is_contig);

        else

            new_dtp->is_contig = 0;

        new_dtp->max_contig_blocks = old_dtp->max_contig_blocks;

    }

    *newtype_p = new_dtp->handle;

    MPL_DBG_MSG_P(MPIR_DBG_DATATYPE, VERBOSE, "resized type %x created.", new_dtp->handle);

    return MPI_SUCCESS;

}

#undef FUNCNAME

#define FUNCNAME MPI_Type_create_resized

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

   MPI_Type_create_resized - Create a datatype with a new lower bound and

     extent from an existing datatype

Input Parameters:

+ oldtype - input datatype (handle)

. lb - new lower bound of datatype (address integer)

- extent - new extent of datatype (address integer)

Output Parameters:

. newtype - output datatype (handle)

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_TYPE

@*/

int MPI_Type_create_resized(MPI_Datatype oldtype,

                            MPI_Aint lb, MPI_Aint extent, MPI_Datatype * newtype)

{

    int mpi_errno = MPI_SUCCESS;

    MPI_Datatype new_handle = MPI_DATATYPE_NULL;

    MPIR_Datatype *new_dtp;

    MPI_Aint aints[2];

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_TYPE_CREATE_RESIZED);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_TYPE_CREATE_RESIZED);

    /* Get handles to MPI objects. */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_Datatype *datatype_ptr = NULL;

            MPIR_ERRTEST_DATATYPE(oldtype, "datatype", mpi_errno);

            /* Validate datatype_ptr */

            MPIR_Datatype_get_ptr(oldtype, datatype_ptr);

            MPIR_Datatype_valid_ptr(datatype_ptr, mpi_errno);

            /* If datatype_ptr is not valid, it will be reset to null */

            if (mpi_errno)

                goto fn_fail;

            MPIR_ERRTEST_ARGNULL(newtype, "newtype", mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    mpi_errno = MPIR_Type_create_resized(oldtype, lb, extent, &new_handle);

    /* --BEGIN ERROR HANDLING-- */

    if (mpi_errno != MPI_SUCCESS)

        goto fn_fail;

    /* --END ERROR HANDLING-- */

    aints[0] = lb;

    aints[1] = extent;

    MPIR_Datatype_get_ptr(new_handle, new_dtp);

    mpi_errno = MPIR_Datatype_set_contents(new_dtp, MPI_COMBINER_RESIZED, 0, 2, /* Aints */

                                           1, NULL, aints, &oldtype);

    if (mpi_errno != MPI_SUCCESS)

        goto fn_fail;

    MPIR_OBJ_PUBLISH_HANDLE(*newtype, new_handle);

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

  fn_exit:

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_TYPE_CREATE_RESIZED);

    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_resized",

                                 "**mpi_type_create_resized %D %L %L %p", oldtype, lb, extent,

                                 newtype);

    }

#endif

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}