/*@
   MPI_Win_call_errhandler - Call the error handler installed on a 
   window object

Input Parameters:
+ win - window with error handler (handle) 
- errorcode - error code (integer) 

 Note:
 Assuming the input parameters are valid, when the error handler is set to
 MPI_ERRORS_RETURN, this routine will always return MPI_SUCCESS.
 
.N ThreadSafeNoUpdate

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_WIN
@*/
int MPI_Win_call_errhandler(MPI_Win win, int errorcode)
{
    int mpi_errno = MPI_SUCCESS;
    MPID_Win *win_ptr = NULL;
    int in_cs = FALSE;
    MPID_THREADPRIV_DECL;
    MPID_MPI_STATE_DECL(MPID_STATE_MPI_WIN_CALL_ERRHANDLER);

    MPIR_ERRTEST_INITIALIZED_ORDIE();
    
    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_WIN_CALL_ERRHANDLER);

    MPID_THREADPRIV_GET;
    
    /* Validate parameters, especially handles needing to be converted */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
	    MPIR_ERRTEST_WIN(win, mpi_errno);
        }
        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 */
            if (mpi_errno) goto fn_fail;
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */

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

    MPID_THREAD_CS_ENTER(POBJ, MPIR_THREAD_POBJ_WIN_MUTEX(win_ptr));
    in_cs = TRUE;

    if (!win_ptr->errhandler || 
	win_ptr->errhandler->handle == MPI_ERRORS_ARE_FATAL) {
	mpi_errno = MPIR_Err_return_win( win_ptr, "MPI_Win_call_errhandler", errorcode );
	goto fn_exit;
    }

    if (win_ptr->errhandler->handle == MPI_ERRORS_RETURN) {
	/* MPI_ERRORS_RETURN should always return MPI_SUCCESS */
	goto fn_exit;
    }

    /* Check for the special case of errors-throw-exception.  In this case
       return the error code; the C++ wrapper will cause an exception to
       be thrown.
       */
#ifdef HAVE_CXX_BINDING
    if (win_ptr->errhandler->handle == MPIR_ERRORS_THROW_EXCEPTIONS) {
	mpi_errno = errorcode;
	goto fn_exit;
    }
#endif
    switch (win_ptr->errhandler->language) {
    case MPID_LANG_C:
	(*win_ptr->errhandler->errfn.C_Win_Handler_function)( 
	    &win_ptr->handle, &errorcode );
	break;
#ifdef HAVE_CXX_BINDING
    case MPID_LANG_CXX:
	MPIR_Process.cxx_call_errfn( 2, &win_ptr->handle, 
				     &errorcode, 
     (void (*)(void))win_ptr->errhandler->errfn.C_Win_Handler_function );
	break;
#endif
#ifdef HAVE_FORTRAN_BINDING
    case MPID_LANG_FORTRAN90:
    case MPID_LANG_FORTRAN:
	{
	    /* If int and MPI_Fint aren't the same size, we need to 
	       convert.  As this is not performance critical, we
	       do this even if MPI_Fint and int are the same size. */
	    MPI_Fint ferr=errorcode;
	    MPI_Fint winhandle=win_ptr->handle;
	(*win_ptr->errhandler->errfn.F77_Handler_function)( &winhandle, &ferr );
	}
	break;
#endif
    }
    
    /* ... end of body of routine ... */

  fn_exit:
    if (in_cs)
        MPID_THREAD_CS_EXIT(POBJ, MPIR_THREAD_POBJ_WIN_MUTEX(win_ptr));

    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_WIN_CALL_ERRHANDLER);
    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, 
	    "**mpi_win_call_errhandler", 
	    "**mpi_win_call_errhandler %W %d", win, errorcode);
    }
    mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);
    goto fn_exit;
#   endif
    /* --END ERROR HANDLING-- */
}
/*@
   MPI_Win_get_errhandler - Get the error handler for the MPI RMA window

Input Parameters:
. win - window (handle)

Output Parameters:
. errhandler - error handler currently associated with window (handle)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_WIN
.N MPI_ERR_OTHER
@*/
int MPI_Win_get_errhandler(MPI_Win win, MPI_Errhandler * errhandler)
{
    int mpi_errno = MPI_SUCCESS;
    MPIR_Win *win_ptr = NULL;
    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WIN_GET_ERRHANDLER);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_WIN_GET_ERRHANDLER);

    /* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
            MPIR_ERRTEST_WIN(win, 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;
        {
            MPIR_ERRTEST_ARGNULL(errhandler, "errhandler", mpi_errno);
            /* Validate win_ptr */
            MPIR_Win_valid_ptr(win_ptr, mpi_errno);
            /* If win_ptr is not valid, it will be reset to null */
            if (mpi_errno)
                goto fn_fail;
        }
        MPID_END_ERROR_CHECKS;
    }
#endif /* HAVE_ERROR_CHECKING */

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

    MPID_THREAD_CS_ENTER(POBJ, MPIR_THREAD_POBJ_WIN_MUTEX(win_ptr));

    if (win_ptr->errhandler) {
        *errhandler = win_ptr->errhandler->handle;
        MPIR_Errhandler_add_ref(win_ptr->errhandler);
    } else {
        /* Use the default */
        *errhandler = MPI_ERRORS_ARE_FATAL;
    }

    MPID_THREAD_CS_EXIT(POBJ, MPIR_THREAD_POBJ_WIN_MUTEX(win_ptr));

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

#ifdef HAVE_ERROR_CHECKING
  fn_exit:
#endif
    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_WIN_GET_ERRHANDLER);
    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,
                                 "**mpi_win_get_errhandler", "**mpi_win_get_errhandler %W %p", win,
                                 errhandler);
    }
    mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);
    goto fn_exit;
#endif
    /* --END ERROR HANDLING-- */
}
/*@
   MPI_Win_set_errhandler - Set window error handler

Input Parameters:
+ win - window (handle) 
- errhandler - new error handler for window (handle) 

.N ThreadSafeNoUpdate

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_WIN
@*/
int MPI_Win_set_errhandler(MPI_Win win, MPI_Errhandler errhandler)
{
#ifdef HAVE_ERROR_CHECKING
    static const char FCNAME[] = "MPI_Win_set_errhandler";
#endif
    int mpi_errno = MPI_SUCCESS;
    MPID_Win *win_ptr = NULL;
    int  in_use;
    MPID_Errhandler *errhan_ptr = NULL;
    MPID_MPI_STATE_DECL(MPID_STATE_MPI_WIN_SET_ERRHANDLER);

    MPIR_ERRTEST_INITIALIZED_ORDIE();
    
    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_WIN_SET_ERRHANDLER);

    /* Validate parameters, especially handles needing to be converted */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
	    MPIR_ERRTEST_WIN(win, mpi_errno);
	    MPIR_ERRTEST_ERRHANDLER(errhandler, mpi_errno);
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif
    
    /* Convert MPI object handles to object pointers */
    MPID_Win_get_ptr( win, win_ptr );
    MPID_Errhandler_get_ptr( errhandler, errhan_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 value, it will be reset to null */

	    if (HANDLE_GET_KIND(errhandler) != HANDLE_KIND_BUILTIN) {
		MPID_Errhandler_valid_ptr( errhan_ptr,mpi_errno );
		/* Also check for a valid errhandler kind */
		if (!mpi_errno) {
		    if (errhan_ptr->kind != MPID_WIN) {
			mpi_errno = MPIR_Err_create_code(
			    MPI_SUCCESS, MPIR_ERR_RECOVERABLE, FCNAME,
			    __LINE__, MPI_ERR_ARG, "**errhandnotwin", NULL );
		    }
		}
	    }
            if (mpi_errno) goto fn_fail;
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */

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

    MPID_THREAD_CS_ENTER(POBJ, MPIR_THREAD_POBJ_WIN_MUTEX(win_ptr));

    if (win_ptr->errhandler != NULL) {
        MPIR_Errhandler_release_ref(win_ptr->errhandler,&in_use);
        if (!in_use) {
            MPID_Errhandler_free( win_ptr->errhandler );
        }
    }

    MPIR_Errhandler_add_ref(errhan_ptr);
    win_ptr->errhandler = errhan_ptr;

    MPID_THREAD_CS_EXIT(POBJ, MPIR_THREAD_POBJ_WIN_MUTEX(win_ptr));

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

#ifdef HAVE_ERROR_CHECKING
  fn_exit:
#endif
    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_WIN_SET_ERRHANDLER);
    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, 
	    "**mpi_win_set_errhandler",
	    "**mpi_win_set_errhandler %W %E", win, errhandler);
    }
    mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);
    goto fn_exit;
#   endif
    /* --END ERROR HANDLING-- */
}