diff options
Diffstat (limited to 'gcc/ada/g-boubuf.adb')
| -rw-r--r-- | gcc/ada/g-boubuf.adb | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/gcc/ada/g-boubuf.adb b/gcc/ada/g-boubuf.adb new file mode 100644 index 00000000000..5b6a9a830c5 --- /dev/null +++ b/gcc/ada/g-boubuf.adb @@ -0,0 +1,93 @@ +------------------------------------------------------------------------------ +-- -- +-- 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; |