------------------------------------------------------------------------------
-- --
--- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- A D A . D Y N A M I C _ P R I O R I T I E S --
-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2001, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
-- --
-- GNARL 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- --
-- 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 GNARL; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, 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, --
-- --
------------------------------------------------------------------------------
-with Ada.Task_Identification;
--- used for Task_Id
--- Current_Task
--- Null_Task_Id
--- Is_Terminated
-
with System.Task_Primitives.Operations;
-- used for Write_Lock
-- Unlock
-- Self
with System.Tasking;
--- used for Task_ID
-
-with Ada.Exceptions;
--- used for Raise_Exception
-
-with System.Tasking.Initialization;
--- used for Defer/Undefer_Abort
+-- used for Task_Id
with System.Parameters;
-- used for Single_Lock
+with System.Soft_Links;
+-- use for Abort_Defer
+-- Abort_Undefer
+
with Unchecked_Conversion;
package body Ada.Dynamic_Priorities is
package STPO renames System.Task_Primitives.Operations;
+ package SSL renames System.Soft_Links;
use System.Parameters;
use System.Tasking;
- use Ada.Exceptions;
function Convert_Ids is new
Unchecked_Conversion
- (Task_Identification.Task_Id, System.Tasking.Task_ID);
+ (Task_Identification.Task_Id, System.Tasking.Task_Id);
------------------
-- Get_Priority --
function Get_Priority
(T : Ada.Task_Identification.Task_Id :=
- Ada.Task_Identification.Current_Task)
- return System.Any_Priority is
-
- Target : constant Task_ID := Convert_Ids (T);
+ Ada.Task_Identification.Current_Task) return System.Any_Priority
+ is
+ Target : constant Task_Id := Convert_Ids (T);
Error_Message : constant String := "Trying to get the priority of a ";
begin
if Target = Convert_Ids (Ada.Task_Identification.Null_Task_Id) then
- Raise_Exception (Program_Error'Identity,
- Error_Message & "null task");
+ raise Program_Error with Error_Message & "null task";
end if;
if Task_Identification.Is_Terminated (T) then
- Raise_Exception (Tasking_Error'Identity,
- Error_Message & "null task");
+ raise Tasking_Error with Error_Message & "null task";
end if;
return Target.Common.Base_Priority;
procedure Set_Priority
(Priority : System.Any_Priority;
- T : Ada.Task_Identification.Task_Id :=
- Ada.Task_Identification.Current_Task)
+ T : Ada.Task_Identification.Task_Id :=
+ Ada.Task_Identification.Current_Task)
is
- Target : constant Task_ID := Convert_Ids (T);
- Self_ID : constant Task_ID := STPO.Self;
+ Target : constant Task_Id := Convert_Ids (T);
+ Self_ID : constant Task_Id := STPO.Self;
Error_Message : constant String := "Trying to set the priority of a ";
begin
if Target = Convert_Ids (Ada.Task_Identification.Null_Task_Id) then
- Raise_Exception (Program_Error'Identity,
- Error_Message & "null task");
+ raise Program_Error with Error_Message & "null task";
end if;
if Task_Identification.Is_Terminated (T) then
- Raise_Exception (Tasking_Error'Identity,
- Error_Message & "terminated task");
+ raise Tasking_Error with Error_Message & "terminated task";
end if;
- Initialization.Defer_Abort (Self_ID);
+ SSL.Abort_Defer.all;
if Single_Lock then
STPO.Lock_RTS;
STPO.Unlock_RTS;
end if;
- STPO.Yield;
- -- Yield is needed to enforce FIFO task dispatching.
- -- LL Set_Priority is made while holding the RTS lock so that
- -- it is inheriting high priority until it release all the RTS
- -- locks.
+ -- Yield is needed to enforce FIFO task dispatching
+
+ -- LL Set_Priority is made while holding the RTS lock so that it
+ -- is inheriting high priority until it release all the RTS locks.
+
-- If this is used in a system where Ceiling Locking is
-- not enforced we may end up getting two Yield effects.
+ STPO.Yield;
+
else
Target.New_Base_Priority := Priority;
Target.Pending_Priority_Change := True;
Target.Pending_Action := True;
STPO.Wakeup (Target, Target.Common.State);
+
-- If the task is suspended, wake it up to perform the change.
-- check for ceiling violations ???
end if;
end if;
- Initialization.Undefer_Abort (Self_ID);
+ SSL.Abort_Undefer.all;
end Set_Priority;
end Ada.Dynamic_Priorities;
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