------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
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--                  G N A T . B O U N D E D _ B U F F E R S                 --
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--                     Copyright (C) 2003-2010, AdaCore                     --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
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------------------------------------------------------------------------------

package body Bounded_Buffers_Blocking_Producer is

   --------------------
   -- Bounded_Buffer --
   --------------------

   protected body Bounded_Buffer is

      ------------
      -- Insert --
      ------------

      entry Insert (Item : Element) when Not_Full is
      begin
         Values (Next_In) := Item;
         Next_In := (Next_In mod Capacity) + 1;
         Count := Count + 1;
         Not_Full := Count /= Capacity;
      end Insert;

      ------------
      -- Remove --
      ------------

      procedure Remove (Item : out Element) is
      begin
         Item := Values (Next_Out);
         Next_Out := (Next_Out mod Capacity) + 1;
         Count := Count - 1;
         Not_Full := True;
      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 Bounded_Buffers_Blocking_Producer;
