/* -*- 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_Win_get_attr */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Win_get_attr = PMPI_Win_get_attr

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Win_get_attr  MPI_Win_get_attr

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Win_get_attr as PMPI_Win_get_attr

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Win_get_attr(MPI_Win win, int win_keyval, void *attribute_val, int *flag)

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

#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_Win_get_attr

#define MPI_Win_get_attr PMPI_Win_get_attr

#undef FUNCNAME

#define FUNCNAME MPII_Win_get_attr

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPII_Win_get_attr(MPI_Win win, int win_keyval, void *attribute_val,

                      int *flag, MPIR_Attr_type outAttrType)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_Win *win_ptr = NULL;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPIR_WIN_GET_ATTR);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPIR_WIN_GET_ATTR);

    /* Validate parameters, especially handles needing to be converted */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_WIN(win, mpi_errno);

            MPIR_ERRTEST_KEYVAL(win_keyval, MPIR_WIN, "window", mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif

    /* Convert MPI object handles to object pointers */

    MPIR_Win_get_ptr(win, win_ptr);

    /* Validate parameters and objects (post conversion) */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            /* Validate win_ptr */

            MPIR_Win_valid_ptr(win_ptr, mpi_errno);

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

            MPIR_ERRTEST_ARGNULL(attribute_val, "attribute_val", mpi_errno);

            MPIR_ERRTEST_ARGNULL(flag, "flag", mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    /* Check for builtin attribute */

    /* This code is ok for correct programs, but it would be better

     * to copy the values from the per-process block and pass the user

     * a pointer to a copy */

    /* Note that if we are called from Fortran, we must return the values,

     * not the addresses, of these attributes */

    if (HANDLE_GET_KIND(win_keyval) == HANDLE_KIND_BUILTIN) {

        void **attr_val_p = (void **) attribute_val;

#ifdef HAVE_FORTRAN_BINDING

        /* Note that this routine only has a Fortran 90 binding,

         * so the attribute value is an address-sized int */

        intptr_t *attr_int = (intptr_t *) attribute_val;

#endif

        *flag = 1;

        /*

         * The C versions of the attributes return the address of a

         * *COPY* of the value (to prevent the user from changing it)

         * and the Fortran versions provide the actual value (as a Fint)

         */

        switch (win_keyval) {

            case MPI_WIN_BASE:

                *attr_val_p = win_ptr->base;

                break;

            case MPI_WIN_SIZE:

                win_ptr->copySize = win_ptr->size;

                *attr_val_p = &win_ptr->copySize;

                break;

            case MPI_WIN_DISP_UNIT:

                win_ptr->copyDispUnit = win_ptr->disp_unit;

                *attr_val_p = &win_ptr->copyDispUnit;

                break;

            case MPI_WIN_CREATE_FLAVOR:

                win_ptr->copyCreateFlavor = win_ptr->create_flavor;

                *attr_val_p = &win_ptr->copyCreateFlavor;

                break;

            case MPI_WIN_MODEL:

                win_ptr->copyModel = win_ptr->model;

                *attr_val_p = &win_ptr->copyModel;

                break;

#ifdef HAVE_FORTRAN_BINDING

            case MPII_ATTR_C_TO_FORTRAN(MPI_WIN_BASE):

                /* The Fortran routine that matches this routine should

                 * provide an address-sized integer, not an MPI_Fint */

                *attr_int = MPIR_VOID_PTR_CAST_TO_MPI_AINT(win_ptr->base);

                break;

            case MPII_ATTR_C_TO_FORTRAN(MPI_WIN_SIZE):

                /* We do not need to copy because we return the value,

                 * not a pointer to the value */

                *attr_int = win_ptr->size;

                break;

            case MPII_ATTR_C_TO_FORTRAN(MPI_WIN_DISP_UNIT):

                /* We do not need to copy because we return the value,

                 * not a pointer to the value */

                *attr_int = win_ptr->disp_unit;

                break;

            case MPII_ATTR_C_TO_FORTRAN(MPI_WIN_CREATE_FLAVOR):

                *attr_int = win_ptr->create_flavor;

                break;

            case MPII_ATTR_C_TO_FORTRAN(MPI_WIN_MODEL):

                *attr_int = win_ptr->model;

                break;

#endif

            default:

                MPIR_Assert(FALSE);

                break;

        }

    } else {

        MPIR_Attribute *p = win_ptr->attributes;

        *flag = 0;

        while (p) {

            if (p->keyval->handle == win_keyval) {

                *flag = 1;

                if (outAttrType == MPIR_ATTR_PTR) {

                    if (p->attrType == MPIR_ATTR_INT) {

                        /* This is the tricky case: if the system is

                         * bigendian, and we have to return a pointer to

                         * an int, then we may need to point to the

                         * correct location in the word. */

#if defined(WORDS_LITTLEENDIAN) || (SIZEOF_VOID_P == SIZEOF_INT)

                        *(void **) attribute_val = &(p->value);

#else

                        int *p_loc = (int *) &(p->value);

#if SIZEOF_VOID_P == 2 * SIZEOF_INT

                        p_loc++;

#else

#error Expected sizeof(void*) to be either sizeof(int) or 2*sizeof(int)

#endif

                        *(void **) attribute_val = p_loc;

#endif

                    } else if (p->attrType == MPIR_ATTR_AINT) {

                        *(void **) attribute_val = &(p->value);

                    } else {

                        *(void **) attribute_val = (void *) (intptr_t) (p->value);

                    }

                } else

                    *(void **) attribute_val = (void *) (intptr_t) (p->value);

                break;

            }

            p = p->next;

        }

    }

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

#ifdef HAVE_ERROR_CHECKING

  fn_exit:

#endif

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPIR_WIN_GET_ATTR);

    MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    return mpi_errno;

    /* --BEGIN ERROR HANDLING-- */

#ifdef HAVE_ERROR_CHECKING

  fn_fail:

    {

        mpi_errno =

            MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,

                                 "**mpir_wingetattr", "**mpir_wingetattr %W %d %p %p", win,

                                 win_keyval, attribute_val, flag);

    }

    mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);

    goto fn_exit;

#endif

    /* --END ERROR HANDLING-- */

}

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Win_get_attr

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

   MPI_Win_get_attr - Get attribute cached on an MPI window object

Input Parameters:

+ win - window to which the attribute is attached (handle)

- win_keyval - key value (integer)

Output Parameters:

+ attribute_val - attribute value, unless flag is false

- flag - false if no attribute is associated with the key (logical)

   Notes:

   The following attributes are predefined for all MPI Window objects\:

+ MPI_WIN_BASE - window base address.

. MPI_WIN_SIZE - window size, in bytes.

- MPI_WIN_DISP_UNIT - displacement unit associated with the window.

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_WIN

.N MPI_ERR_KEYVAL

.N MPI_ERR_OTHER

@*/

int MPI_Win_get_attr(MPI_Win win, int win_keyval, void *attribute_val, int *flag)

{

    int mpi_errno = MPI_SUCCESS;

#ifdef HAVE_ERROR_CHECKING

    MPIR_Win *win_ptr = NULL;

#endif

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WIN_GET_ATTR);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_WIN_GET_ATTR);

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

    mpi_errno = MPII_Win_get_attr(win, win_keyval, attribute_val, flag, MPIR_ATTR_PTR);

    if (mpi_errno)

        goto fn_fail;

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

  fn_exit:

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_WIN_GET_ATTR);

    return mpi_errno;

    /* --BEGIN ERROR HANDLING-- */

  fn_fail:

#ifdef HAVE_ERROR_CHECKING

    {

        mpi_errno =

            MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,

                                 "**mpi_win_get_attr", "**mpi_win_get_attr %W %d %p %p", win,

                                 win_keyval, attribute_val, flag);

    }

    MPIR_Win_get_ptr(win, win_ptr);

    mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);

#endif

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}