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109 | ------------------------------------------------------------------------------
-- Templates Parser --
-- --
-- Copyright (C) 2005-2012, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This library is distributed in the hope that it will be --
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- 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/>. --
-- --
-- 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. --
------------------------------------------------------------------------------
with Ada.Task_Identification;
package body Templates_Parser_Tasking is
use Ada.Task_Identification;
-- Simple semaphore
protected Semaphore is
entry Lock;
procedure Unlock;
private
entry Lock_Internal;
TID : Task_Id := Null_Task_Id;
Lock_Count : Natural := 0;
end Semaphore;
----------
-- Lock --
----------
procedure Lock is
begin
Semaphore.Lock;
end Lock;
---------------
-- Semaphore --
---------------
protected body Semaphore is
----------
-- Lock --
----------
entry Lock when True is
begin
if TID = Lock'Caller then
Lock_Count := Lock_Count + 1;
else
requeue Lock_Internal;
end if;
end Lock;
-------------------
-- Lock_Internal --
-------------------
entry Lock_Internal when Lock_Count = 0 is
begin
TID := Lock_Internal'Caller;
Lock_Count := 1;
end Lock_Internal;
------------
-- Unlock --
------------
procedure Unlock is
begin
if TID = Current_Task then
Lock_Count := Lock_Count - 1;
else
raise Tasking_Error;
end if;
end Unlock;
end Semaphore;
------------
-- Unlock --
------------
procedure Unlock is
begin
Semaphore.Unlock;
end Unlock;
end Templates_Parser_Tasking;
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