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1 281 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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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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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--                     Copyright (C) 2003-2006, AdaCore                     --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
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-- for  more details.  You should have  received  a copy of the GNU General --
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-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
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-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
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-- Boston, MA 02110-1301, USA.                                              --
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--                                                                          --
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-- As a special exception,  if other files  instantiate  generics from this --
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-- unit, or you link  this unit with other files  to produce an executable, --
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-- this  unit  does not  by itself cause  the resulting  executable  to  be --
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-- covered  by the  GNU  General  Public  License.  This exception does not --
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-- however invalidate  any other reasons why  the executable file  might be --
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-- covered by the  GNU Public License.                                      --
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--                                                                          --
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-- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com).   --
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--                                                                          --
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------------------------------------------------------------------------------
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package body GNAT.Bounded_Buffers is
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   --------------------
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   -- Bounded_Buffer --
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   --------------------
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   protected body Bounded_Buffer is
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      ------------
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      -- Insert --
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      ------------
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      entry Insert (Item : Element) when Count /= Capacity is
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      begin
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         Values (Next_In) := Item;
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         Next_In := (Next_In mod Capacity) + 1;
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         Count := Count + 1;
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      end Insert;
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      ------------
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      -- Remove --
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      ------------
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      entry Remove (Item : out Element) when Count > 0 is
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      begin
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         Item := Values (Next_Out);
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         Next_Out := (Next_Out mod Capacity) + 1;
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         Count := Count - 1;
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      end Remove;
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      -----------
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      -- Empty --
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      -----------
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      function Empty return Boolean is
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      begin
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         return Count = 0;
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      end Empty;
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      ----------
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      -- Full --
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      ----------
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      function Full return Boolean is
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      begin
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         return Count = Capacity;
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      end Full;
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      ------------
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      -- Extent --
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      ------------
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      function Extent return Natural is
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      begin
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         return Count;
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      end Extent;
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   end Bounded_Buffer;
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end GNAT.Bounded_Buffers;

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