1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . D I S P A T C H I N G . R O U N D _ R O B I N --
9 -- Copyright (C) 2006, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 package body Ada
.Dispatching
.Round_Robin
is
41 (Pri
: System
.Priority
;
42 Quantum
: Ada
.Real_Time
.Time_Span
)
44 pragma Unreferenced
(Quantum
);
46 if not Is_Round_Robin
(Pri
) then
47 raise Dispatching_Policy_Error
;
56 (Low
, High
: System
.Priority
;
57 Quantum
: Ada
.Real_Time
.Time_Span
)
59 pragma Unreferenced
(Quantum
);
61 for Index
in Low
.. High
loop
62 if not Is_Round_Robin
(Index
) then
63 raise Dispatching_Policy_Error
;
72 function Actual_Quantum
73 (Pri
: System
.Priority
) return Ada
.Real_Time
.Time_Span
76 if Is_Round_Robin
(Pri
) then
77 return Default_Quantum
;
79 raise Dispatching_Policy_Error
;
87 function Is_Round_Robin
(Pri
: System
.Priority
) return Boolean is
88 function Get_Policy
(Prio
: System
.Any_Priority
) return Character;
89 pragma Import
(C
, Get_Policy
, "__gnat_get_specific_dispatching");
91 return Get_Policy
(Pri
) = 'R';
94 end Ada
.Dispatching
.Round_Robin
;