text: /* -*- 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 MPIR_WinGetAttr
  #undef FCNAME
  #define FCNAME MPIU_QUOTE(FUNCNAME)
  int MPIR_WinGetAttr( MPI_Win win, int win_keyval, void *attribute_val, 
  		     int *flag, MPIR_AttrType outAttrType )
  {
      int mpi_errno = MPI_SUCCESS;
      MPID_Win *win_ptr = NULL;
      MPID_MPI_STATE_DECL(MPID_STATE_MPIR_WIN_GET_ATTR);
  
      MPIR_ERRTEST_INITIALIZED_ORDIE();
      
      MPIU_THREAD_CS_ENTER(ALLFUNC,);
      MPID_MPI_FUNC_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, MPID_WIN, "window", mpi_errno);
  #           ifdef NEEDS_POINTER_ALIGNMENT_ADJUST
              /* A common user error is to pass the address of a 4-byte
  	       int when the address of a pointer (or an address-sized int)
  	       should have been used.  We can test for this specific
  	       case.  Note that this code assumes sizeof(MPIR_Pint) is
  	       a power of 2. */
  	    if ((MPIR_Pint)attribute_val & (sizeof(MPIR_Pint)-1)) {
  		MPIU_ERR_SETANDSTMT(mpi_errno,MPI_ERR_ARG,goto fn_fail,"**attrnotptr");
  	    }
  #           endif
          }
          MPID_END_ERROR_CHECKS;
      }
  #   endif
      
      /* Convert MPI object handles to object pointers */
      MPID_Win_get_ptr( win, win_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 */
  	    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 */
  	MPIR_Pint  *attr_int = (MPIR_Pint *)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 MPIR_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 = MPI_VOID_PTR_CAST_TO_MPI_AINT(win_ptr->base);
  	    break;
          case MPIR_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 MPIR_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 MPIR_ATTR_C_TO_FORTRAN(MPI_WIN_CREATE_FLAVOR):
  	    *attr_int = win_ptr->create_flavor;
  	    break;
  	case MPIR_ATTR_C_TO_FORTRAN(MPI_WIN_MODEL):
  	    *attr_int = win_ptr->model;
  	    break;
  #endif
          default:
              MPIU_Assert(FALSE);
              break;
  	}
      }
      else {
  	MPID_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 *)(MPIR_Pint)(p->value);
  		    }
  		}
  		else
  		    *(void**)attribute_val = (void *)(MPIR_Pint)(p->value);
  		
  		break;
  	    }
  	    p = p->next;
  	}
      }
  
      /* ... end of body of routine ... */
  
  #ifdef HAVE_ERROR_CHECKING
    fn_exit:
  #endif
      MPID_MPI_FUNC_EXIT(MPID_STATE_MPIR_WIN_GET_ATTR);
      MPIU_THREAD_CS_EXIT(ALLFUNC,);
      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 MPIU_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
      MPID_Win *win_ptr = NULL;
  #endif
      MPID_MPI_STATE_DECL(MPID_STATE_MPI_WIN_GET_ATTR);
  
      MPIR_ERRTEST_INITIALIZED_ORDIE();
      
      MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_WIN_GET_ATTR);
  
      /* ... body of routine ...  */
      mpi_errno = MPIR_WinGetAttr( win, win_keyval, attribute_val, flag, 
  				 MPIR_ATTR_PTR );
      if (mpi_errno) goto fn_fail;
      /* ... end of body of routine ... */
  
    fn_exit:
      MPID_MPI_FUNC_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);
      }
      MPID_Win_get_ptr( win, win_ptr );
      mpi_errno = MPIR_Err_return_win( win_ptr, FCNAME, mpi_errno );
  #endif
      goto fn_exit;
      /* --END ERROR HANDLING-- */
  }
  