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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T . B O U N D E D _ B U F F E R 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 is maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
package body GNAT.Bounded_Buffers is
--------------------
-- Bounded_Buffer --
--------------------
protected body Bounded_Buffer is
------------
-- Insert --
------------
entry Insert (Item : in Element) when Count /= Capacity is
begin
Values (Next_In) := Item;
Next_In := (Next_In mod Capacity) + 1;
Count := Count + 1;
end Insert;
------------
-- Remove --
------------
entry Remove (Item : out Element) when Count > 0 is
begin
Item := Values (Next_Out);
Next_Out := (Next_Out mod Capacity) + 1;
Count := Count - 1;
end Remove;
-----------
-- Empty --
-----------
function Empty return Boolean is
begin
return Count = 0;
end Empty;
----------
-- Full --
----------
function Full return Boolean is
begin
return Count = Capacity;
end Full;
------------
-- Extent --
------------
function Extent return Natural is
begin
return Count;
end Extent;
end Bounded_Buffer;
end GNAT.Bounded_Buffers;
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