/* -*- 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"

#include "attr.h"

/* -- Begin Profiling Symbol Block for routine MPI_Win_set_attr */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Win_set_attr = PMPI_Win_set_attr

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Win_set_attr  MPI_Win_set_attr

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Win_set_attr as PMPI_Win_set_attr

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Win_set_attr(MPI_Win win, int win_keyval, void *attribute_val) __attribute__((weak,alias("PMPI_Win_set_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_set_attr

#define MPI_Win_set_attr PMPI_Win_set_attr

#undef FUNCNAME

#define FUNCNAME MPIR_WinSetAttr

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

		     MPIR_AttrType attrType )

{

    static const char FCNAME[] = "MPI_Win_set_attr";

    int mpi_errno = MPI_SUCCESS;

    MPID_Win *win_ptr = NULL;

    MPID_Keyval *keyval_ptr = NULL;

    MPID_Attribute *p, **old_p;

    MPID_MPI_STATE_DECL(MPID_STATE_MPIR_WIN_SET_ATTR);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    /* The thread lock prevents a valid attr delete on the same window

       but in a different thread from causing problems */

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPID_MPI_FUNC_ENTER(MPID_STATE_MPIR_WIN_SET_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, MPID_WIN, "window", mpi_errno);

	    MPIR_ERRTEST_KEYVAL_PERM(win_keyval, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#   endif

    /* Convert MPI object handles to object pointers */

    MPID_Win_get_ptr( win, win_ptr );

    MPID_Keyval_get_ptr( win_keyval, keyval_ptr );

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

#   ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            /* Validate win_ptr */

            MPID_Win_valid_ptr( win_ptr, mpi_errno );

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

	    /* Validate keyval */

	    MPID_Keyval_valid_ptr( keyval_ptr, mpi_errno );

            if (mpi_errno) goto fn_fail;

	}

        MPID_END_ERROR_CHECKS;

    }

#   endif /* HAVE_ERROR_CHECKING */

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

    /* Look for attribute.  They are ordered by keyval handle.  This uses 

       a simple linear list algorithm because few applications use more than a 

       handful of attributes */

    old_p = &win_ptr->attributes;

    p = win_ptr->attributes;

    while (p)

    {

	if (p->keyval->handle == keyval_ptr->handle)

	{

	    /* If found, call the delete function before replacing the 

	       attribute */

	    mpi_errno = MPIR_Call_attr_delete( win, p );

	    /* --BEGIN ERROR HANDLING-- */

	    if (mpi_errno)

	    {

		/* FIXME : communicator of window? */

		goto fn_fail;

	    }

	    /* --END ERROR HANDLING-- */

	    p->value    = (MPID_AttrVal_t)(MPIU_Pint)attribute_val;

	    p->attrType = attrType;

	    /* Does not change the reference count on the keyval */

	    break;

	}

	else if (p->keyval->handle > keyval_ptr->handle) {

	    MPID_Attribute *new_p = MPID_Attr_alloc();

	    MPIR_ERR_CHKANDJUMP1(!new_p,mpi_errno,MPI_ERR_OTHER,

				 "**nomem", "**nomem %s", "MPID_Attribute" );

	    new_p->keyval	 = keyval_ptr;

	    new_p->attrType      = attrType;

	    new_p->pre_sentinal	 = 0;

	    new_p->value	 = (MPID_AttrVal_t)(MPIU_Pint)attribute_val;

	    new_p->post_sentinal = 0;

	    new_p->next		 = p->next;

	    MPIR_Keyval_add_ref( keyval_ptr );

	    p->next		 = new_p;

	    break;

	}

	old_p = &p->next;

	p = p->next;

    }

    if (!p)

    {

	MPID_Attribute *new_p = MPID_Attr_alloc();

	MPIR_ERR_CHKANDJUMP1(!new_p,mpi_errno,MPI_ERR_OTHER,

			     "**nomem", "**nomem %s", "MPID_Attribute" );

	/* Did not find in list.  Add at end */

	new_p->attrType      = attrType;

	new_p->keyval	     = keyval_ptr;

	new_p->pre_sentinal  = 0;

	new_p->value	     = (MPID_AttrVal_t)(MPIU_Pint)attribute_val;

	new_p->post_sentinal = 0;

	new_p->next	     = 0;

	MPIR_Keyval_add_ref( keyval_ptr );

	*old_p		     = new_p;

    }

    /* Here is where we could add a hook for the device to detect attribute

       value changes, using something like

       MPID_Dev_win_attr_hook( win_ptr, keyval, attribute_val );

    */

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

  fn_exit:

    MPID_MPI_FUNC_EXIT(MPID_STATE_MPIR_WIN_SET_ATTR);

    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_win_set_attr", 

	    "**mpi_win_set_attr %W %d %p", win, win_keyval, attribute_val);

    }

#   endif

    mpi_errno = MPIR_Err_return_win( win_ptr, FCNAME, mpi_errno );

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Win_set_attr

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

   MPI_Win_set_attr - Stores attribute value associated with a key

Input Parameters:

+ win - MPI window object to which attribute will be attached (handle) 

. win_keyval - key value, as returned by  'MPI_Win_create_keyval' (integer)

- attribute_val - attribute value 

Notes:

The type of the attribute value depends on whether C or Fortran is being used.

In C, an attribute value is a pointer ('void *'); in Fortran, it is an 

address-sized integer.

If an attribute is already present, the delete function (specified when the

corresponding keyval was created) will be called.

.N ThreadSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_WIN

.N MPI_ERR_KEYVAL

@*/

int MPI_Win_set_attr(MPI_Win win, int win_keyval, void *attribute_val)

{

    int mpi_errno = MPI_SUCCESS;

    MPID_MPI_STATE_DECL(MPID_STATE_MPI_WIN_SET_ATTR);

    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_WIN_SET_ATTR);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

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

    mpi_errno = MPIR_WinSetAttr( win, win_keyval, attribute_val, 

				 MPIR_ATTR_PTR );

    if (mpi_errno) goto fn_fail;

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

  fn_exit:

    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_WIN_SET_ATTR);

    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_win_set_attr", 

	    "**mpi_win_set_attr %W %d %p", win, win_keyval, attribute_val);

    }

#   endif

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}