-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, 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- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
--- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
+-- ware Foundation; either version 3, 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 GNARL; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- --
------------------------------------------------------------------------------
--- This version of the body implements queueing policy according to the
--- policy specified by the pragma Queuing_Policy. When no such pragma
--- is specified FIFO policy is used as default.
+-- This version of the body implements queueing policy according to the policy
+-- specified by the pragma Queuing_Policy. When no such pragma is specified
+-- FIFO policy is used as default.
with System.Task_Primitives.Operations;
--- used for Write_Lock
--- Unlock
-
with System.Tasking.Initialization;
--- used for Wakeup_Entry_Caller
-
with System.Parameters;
--- used for Single_Lock
package body System.Tasking.Queuing is
use Protected_Objects;
use Protected_Objects.Entries;
- -- Entry Queues implemented as doubly linked list.
+ -- Entry Queues implemented as doubly linked list
Queuing_Policy : Character;
pragma Import (C, Queuing_Policy, "__gl_queuing_policy");
-- Return number of calls on the waiting queue of E
- function Count_Waiting (E : in Entry_Queue) return Natural is
+ function Count_Waiting (E : Entry_Queue) return Natural is
Count : Natural;
Temp : Entry_Call_Link;
-- Return the head of entry_queue E
- function Head (E : in Entry_Queue) return Entry_Call_Link is
+ function Head (E : Entry_Queue) return Entry_Call_Link is
begin
pragma Assert (Check_Queue (E));
return E.Head;
Broadcast_Program_Error (Self_ID, Object, null);
end;
- -- If a call was selected, dequeue it and return it for service.
+ -- If a call was selected, dequeue it and return it for service
if Entry_Call /= null then
Temp_Call := Entry_Call;
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