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|
------------------------------------------------------------------------------
-- --
-- GNAT LIBRARY COMPONENTS --
-- --
-- G N A T . S E M A P H O R E S --
-- --
-- B o d y --
-- --
-- Copyright (C) 2003 Ada Core Technologies, 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. --
-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
package body GNAT.Semaphores is
------------------------
-- Counting_Semaphore --
------------------------
protected body Counting_Semaphore is
-----------
-- Seize --
-----------
entry Seize when Count > 0 is
begin
Count := Count - 1;
end Seize;
-------------
-- Release --
-------------
procedure Release is
begin
Count := Count + 1;
end Release;
end Counting_Semaphore;
----------------------
-- Binary_Semaphore --
----------------------
protected body Binary_Semaphore is
-----------
-- Seize --
-----------
entry Seize when Available is
begin
Available := False;
end Seize;
-------------
-- Release --
-------------
procedure Release is
begin
Available := True;
end Release;
end Binary_Semaphore;
end GNAT.Semaphores;
|
