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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . D I S P A T C H I N G . R O U N D _ R O B I N --
-- --
-- B o d y --
-- --
-- Copyright (C) 2006, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
package body Ada.Dispatching.Round_Robin is
-----------------
-- Set_Quantum --
-----------------
procedure Set_Quantum
(Pri : System.Priority;
Quantum : Ada.Real_Time.Time_Span)
is
pragma Unreferenced (Quantum);
begin
if not Is_Round_Robin (Pri) then
raise Dispatching_Policy_Error;
end if;
end Set_Quantum;
-----------------
-- Set_Quantum --
-----------------
procedure Set_Quantum
(Low, High : System.Priority;
Quantum : Ada.Real_Time.Time_Span)
is
pragma Unreferenced (Quantum);
begin
for Index in Low .. High loop
if not Is_Round_Robin (Index) then
raise Dispatching_Policy_Error;
end if;
end loop;
end Set_Quantum;
--------------------
-- Actual_Quantum --
--------------------
function Actual_Quantum
(Pri : System.Priority) return Ada.Real_Time.Time_Span
is
begin
if Is_Round_Robin (Pri) then
return Default_Quantum;
else
raise Dispatching_Policy_Error;
end if;
end Actual_Quantum;
--------------------
-- Is_Round_Robin --
--------------------
function Is_Round_Robin (Pri : System.Priority) return Boolean is
function Get_Policy (Prio : System.Any_Priority) return Character;
pragma Import (C, Get_Policy, "__gnat_get_specific_dispatching");
begin
return Get_Policy (Pri) = 'R';
end Is_Round_Robin;
end Ada.Dispatching.Round_Robin;
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