719 lines
20 KiB
Ada
719 lines
20 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S Y S T E M . A U X _ D E C --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
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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 3, 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. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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pragma Style_Checks (All_Checks);
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-- Turn off alpha ordering check on subprograms, this unit is laid
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-- out to correspond to the declarations in the DEC 83 System unit.
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with System.Soft_Links;
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package body System.Aux_DEC is
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package SSL renames System.Soft_Links;
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-----------------------------------
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-- Operations on Largest_Integer --
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-----------------------------------
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-- It would be nice to replace these with intrinsics, but that does
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-- not work yet (the back end would be ok, but GNAT itself objects)
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type LIU is mod 2 ** Largest_Integer'Size;
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-- Unsigned type of same length as Largest_Integer
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function To_LI is new Ada.Unchecked_Conversion (LIU, Largest_Integer);
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function From_LI is new Ada.Unchecked_Conversion (Largest_Integer, LIU);
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function "not" (Left : Largest_Integer) return Largest_Integer is
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begin
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return To_LI (not From_LI (Left));
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end "not";
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function "and" (Left, Right : Largest_Integer) return Largest_Integer is
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begin
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return To_LI (From_LI (Left) and From_LI (Right));
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end "and";
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function "or" (Left, Right : Largest_Integer) return Largest_Integer is
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begin
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return To_LI (From_LI (Left) or From_LI (Right));
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end "or";
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function "xor" (Left, Right : Largest_Integer) return Largest_Integer is
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begin
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return To_LI (From_LI (Left) xor From_LI (Right));
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end "xor";
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--------------------------------------
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-- Arithmetic Operations on Address --
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--------------------------------------
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-- It would be nice to replace these with intrinsics, but that does
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-- not work yet (the back end would be ok, but GNAT itself objects)
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Asiz : constant Integer := Integer (Address'Size) - 1;
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type SA is range -(2 ** Asiz) .. 2 ** Asiz - 1;
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-- Signed type of same size as Address
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function To_A is new Ada.Unchecked_Conversion (SA, Address);
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function From_A is new Ada.Unchecked_Conversion (Address, SA);
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function "+" (Left : Address; Right : Integer) return Address is
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begin
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return To_A (From_A (Left) + SA (Right));
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end "+";
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function "+" (Left : Integer; Right : Address) return Address is
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begin
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return To_A (SA (Left) + From_A (Right));
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end "+";
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function "-" (Left : Address; Right : Address) return Integer is
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pragma Unsuppress (All_Checks);
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-- Because this can raise Constraint_Error for 64-bit addresses
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begin
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return Integer (From_A (Left) - From_A (Right));
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end "-";
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function "-" (Left : Address; Right : Integer) return Address is
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begin
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return To_A (From_A (Left) - SA (Right));
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end "-";
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------------------------
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-- Fetch_From_Address --
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------------------------
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function Fetch_From_Address (A : Address) return Target is
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type T_Ptr is access all Target;
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function To_T_Ptr is new Ada.Unchecked_Conversion (Address, T_Ptr);
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Ptr : constant T_Ptr := To_T_Ptr (A);
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begin
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return Ptr.all;
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end Fetch_From_Address;
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-----------------------
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-- Assign_To_Address --
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-----------------------
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procedure Assign_To_Address (A : Address; T : Target) is
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type T_Ptr is access all Target;
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function To_T_Ptr is new Ada.Unchecked_Conversion (Address, T_Ptr);
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Ptr : constant T_Ptr := To_T_Ptr (A);
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begin
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Ptr.all := T;
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end Assign_To_Address;
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---------------------------------
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-- Operations on Unsigned_Byte --
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---------------------------------
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-- It would be nice to replace these with intrinsics, but that does
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-- not work yet (the back end would be ok, but GNAT itself objects)
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type BU is mod 2 ** Unsigned_Byte'Size;
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-- Unsigned type of same length as Unsigned_Byte
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function To_B is new Ada.Unchecked_Conversion (BU, Unsigned_Byte);
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function From_B is new Ada.Unchecked_Conversion (Unsigned_Byte, BU);
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function "not" (Left : Unsigned_Byte) return Unsigned_Byte is
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begin
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return To_B (not From_B (Left));
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end "not";
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function "and" (Left, Right : Unsigned_Byte) return Unsigned_Byte is
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begin
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return To_B (From_B (Left) and From_B (Right));
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end "and";
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function "or" (Left, Right : Unsigned_Byte) return Unsigned_Byte is
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begin
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return To_B (From_B (Left) or From_B (Right));
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end "or";
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function "xor" (Left, Right : Unsigned_Byte) return Unsigned_Byte is
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begin
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return To_B (From_B (Left) xor From_B (Right));
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end "xor";
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---------------------------------
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-- Operations on Unsigned_Word --
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---------------------------------
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-- It would be nice to replace these with intrinsics, but that does
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-- not work yet (the back end would be ok, but GNAT itself objects)
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type WU is mod 2 ** Unsigned_Word'Size;
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-- Unsigned type of same length as Unsigned_Word
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function To_W is new Ada.Unchecked_Conversion (WU, Unsigned_Word);
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function From_W is new Ada.Unchecked_Conversion (Unsigned_Word, WU);
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function "not" (Left : Unsigned_Word) return Unsigned_Word is
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begin
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return To_W (not From_W (Left));
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end "not";
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function "and" (Left, Right : Unsigned_Word) return Unsigned_Word is
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begin
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return To_W (From_W (Left) and From_W (Right));
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end "and";
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function "or" (Left, Right : Unsigned_Word) return Unsigned_Word is
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begin
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return To_W (From_W (Left) or From_W (Right));
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end "or";
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function "xor" (Left, Right : Unsigned_Word) return Unsigned_Word is
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begin
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return To_W (From_W (Left) xor From_W (Right));
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end "xor";
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-------------------------------------
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-- Operations on Unsigned_Longword --
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-------------------------------------
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-- It would be nice to replace these with intrinsics, but that does
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-- not work yet (the back end would be ok, but GNAT itself objects)
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type LWU is mod 2 ** Unsigned_Longword'Size;
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-- Unsigned type of same length as Unsigned_Longword
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function To_LW is new Ada.Unchecked_Conversion (LWU, Unsigned_Longword);
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function From_LW is new Ada.Unchecked_Conversion (Unsigned_Longword, LWU);
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function "not" (Left : Unsigned_Longword) return Unsigned_Longword is
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begin
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return To_LW (not From_LW (Left));
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end "not";
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function "and" (Left, Right : Unsigned_Longword) return Unsigned_Longword is
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begin
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return To_LW (From_LW (Left) and From_LW (Right));
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end "and";
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function "or" (Left, Right : Unsigned_Longword) return Unsigned_Longword is
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begin
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return To_LW (From_LW (Left) or From_LW (Right));
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end "or";
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function "xor" (Left, Right : Unsigned_Longword) return Unsigned_Longword is
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begin
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return To_LW (From_LW (Left) xor From_LW (Right));
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end "xor";
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-------------------------------
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-- Operations on Unsigned_32 --
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-------------------------------
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-- It would be nice to replace these with intrinsics, but that does
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-- not work yet (the back end would be ok, but GNAT itself objects)
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type U32 is mod 2 ** Unsigned_32'Size;
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-- Unsigned type of same length as Unsigned_32
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function To_U32 is new Ada.Unchecked_Conversion (U32, Unsigned_32);
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function From_U32 is new Ada.Unchecked_Conversion (Unsigned_32, U32);
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function "not" (Left : Unsigned_32) return Unsigned_32 is
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begin
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return To_U32 (not From_U32 (Left));
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end "not";
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function "and" (Left, Right : Unsigned_32) return Unsigned_32 is
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begin
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return To_U32 (From_U32 (Left) and From_U32 (Right));
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end "and";
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function "or" (Left, Right : Unsigned_32) return Unsigned_32 is
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begin
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return To_U32 (From_U32 (Left) or From_U32 (Right));
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end "or";
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function "xor" (Left, Right : Unsigned_32) return Unsigned_32 is
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begin
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return To_U32 (From_U32 (Left) xor From_U32 (Right));
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end "xor";
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-------------------------------------
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-- Operations on Unsigned_Quadword --
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-------------------------------------
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-- It would be nice to replace these with intrinsics, but that does
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-- not work yet (the back end would be ok, but GNAT itself objects)
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type QWU is mod 2 ** 64; -- 64 = Unsigned_Quadword'Size
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-- Unsigned type of same length as Unsigned_Quadword
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function To_QW is new Ada.Unchecked_Conversion (QWU, Unsigned_Quadword);
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function From_QW is new Ada.Unchecked_Conversion (Unsigned_Quadword, QWU);
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function "not" (Left : Unsigned_Quadword) return Unsigned_Quadword is
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begin
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return To_QW (not From_QW (Left));
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end "not";
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function "and" (Left, Right : Unsigned_Quadword) return Unsigned_Quadword is
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begin
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return To_QW (From_QW (Left) and From_QW (Right));
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end "and";
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function "or" (Left, Right : Unsigned_Quadword) return Unsigned_Quadword is
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begin
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return To_QW (From_QW (Left) or From_QW (Right));
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end "or";
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function "xor" (Left, Right : Unsigned_Quadword) return Unsigned_Quadword is
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begin
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return To_QW (From_QW (Left) xor From_QW (Right));
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end "xor";
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-----------------------
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-- Clear_Interlocked --
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-----------------------
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procedure Clear_Interlocked
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(Bit : in out Boolean;
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Old_Value : out Boolean)
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is
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begin
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SSL.Lock_Task.all;
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Old_Value := Bit;
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Bit := False;
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SSL.Unlock_Task.all;
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end Clear_Interlocked;
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procedure Clear_Interlocked
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(Bit : in out Boolean;
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Old_Value : out Boolean;
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Retry_Count : Natural;
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Success_Flag : out Boolean)
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is
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pragma Warnings (Off, Retry_Count);
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begin
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SSL.Lock_Task.all;
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Old_Value := Bit;
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Bit := False;
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Success_Flag := True;
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SSL.Unlock_Task.all;
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end Clear_Interlocked;
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---------------------
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-- Set_Interlocked --
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---------------------
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procedure Set_Interlocked
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(Bit : in out Boolean;
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Old_Value : out Boolean)
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is
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begin
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SSL.Lock_Task.all;
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Old_Value := Bit;
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Bit := True;
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SSL.Unlock_Task.all;
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end Set_Interlocked;
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procedure Set_Interlocked
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(Bit : in out Boolean;
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Old_Value : out Boolean;
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Retry_Count : Natural;
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Success_Flag : out Boolean)
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is
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pragma Warnings (Off, Retry_Count);
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begin
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SSL.Lock_Task.all;
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Old_Value := Bit;
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Bit := True;
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Success_Flag := True;
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SSL.Unlock_Task.all;
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end Set_Interlocked;
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---------------------
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-- Add_Interlocked --
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---------------------
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procedure Add_Interlocked
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(Addend : Short_Integer;
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Augend : in out Aligned_Word;
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Sign : out Integer)
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is
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begin
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SSL.Lock_Task.all;
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Augend.Value := Augend.Value + Addend;
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if Augend.Value < 0 then
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Sign := -1;
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elsif Augend.Value > 0 then
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Sign := +1;
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else
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Sign := 0;
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end if;
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SSL.Unlock_Task.all;
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end Add_Interlocked;
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----------------
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-- Add_Atomic --
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----------------
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procedure Add_Atomic
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(To : in out Aligned_Integer;
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Amount : Integer)
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is
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begin
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SSL.Lock_Task.all;
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To.Value := To.Value + Amount;
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SSL.Unlock_Task.all;
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end Add_Atomic;
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procedure Add_Atomic
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(To : in out Aligned_Integer;
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Amount : Integer;
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Retry_Count : Natural;
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Old_Value : out Integer;
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Success_Flag : out Boolean)
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is
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pragma Warnings (Off, Retry_Count);
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begin
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SSL.Lock_Task.all;
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Old_Value := To.Value;
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To.Value := To.Value + Amount;
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Success_Flag := True;
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SSL.Unlock_Task.all;
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end Add_Atomic;
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procedure Add_Atomic
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(To : in out Aligned_Long_Integer;
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Amount : Long_Integer)
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is
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begin
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SSL.Lock_Task.all;
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To.Value := To.Value + Amount;
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SSL.Unlock_Task.all;
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end Add_Atomic;
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procedure Add_Atomic
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(To : in out Aligned_Long_Integer;
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Amount : Long_Integer;
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Retry_Count : Natural;
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Old_Value : out Long_Integer;
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Success_Flag : out Boolean)
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is
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pragma Warnings (Off, Retry_Count);
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begin
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SSL.Lock_Task.all;
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Old_Value := To.Value;
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To.Value := To.Value + Amount;
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Success_Flag := True;
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SSL.Unlock_Task.all;
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end Add_Atomic;
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----------------
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-- And_Atomic --
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----------------
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type IU is mod 2 ** Integer'Size;
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type LU is mod 2 ** Long_Integer'Size;
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function To_IU is new Ada.Unchecked_Conversion (Integer, IU);
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function From_IU is new Ada.Unchecked_Conversion (IU, Integer);
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function To_LU is new Ada.Unchecked_Conversion (Long_Integer, LU);
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function From_LU is new Ada.Unchecked_Conversion (LU, Long_Integer);
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procedure And_Atomic
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(To : in out Aligned_Integer;
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From : Integer)
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is
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begin
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SSL.Lock_Task.all;
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To.Value := From_IU (To_IU (To.Value) and To_IU (From));
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SSL.Unlock_Task.all;
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end And_Atomic;
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procedure And_Atomic
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(To : in out Aligned_Integer;
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From : Integer;
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Retry_Count : Natural;
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Old_Value : out Integer;
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Success_Flag : out Boolean)
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is
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pragma Warnings (Off, Retry_Count);
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begin
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SSL.Lock_Task.all;
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Old_Value := To.Value;
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To.Value := From_IU (To_IU (To.Value) and To_IU (From));
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Success_Flag := True;
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SSL.Unlock_Task.all;
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end And_Atomic;
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procedure And_Atomic
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(To : in out Aligned_Long_Integer;
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From : Long_Integer)
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is
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begin
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SSL.Lock_Task.all;
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To.Value := From_LU (To_LU (To.Value) and To_LU (From));
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SSL.Unlock_Task.all;
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end And_Atomic;
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procedure And_Atomic
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(To : in out Aligned_Long_Integer;
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From : Long_Integer;
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Retry_Count : Natural;
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Old_Value : out Long_Integer;
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Success_Flag : out Boolean)
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is
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pragma Warnings (Off, Retry_Count);
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begin
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SSL.Lock_Task.all;
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Old_Value := To.Value;
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To.Value := From_LU (To_LU (To.Value) and To_LU (From));
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Success_Flag := True;
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SSL.Unlock_Task.all;
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end And_Atomic;
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|
|
---------------
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-- Or_Atomic --
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---------------
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procedure Or_Atomic
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(To : in out Aligned_Integer;
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From : Integer)
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is
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begin
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SSL.Lock_Task.all;
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To.Value := From_IU (To_IU (To.Value) or To_IU (From));
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SSL.Unlock_Task.all;
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end Or_Atomic;
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|
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procedure Or_Atomic
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(To : in out Aligned_Integer;
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From : Integer;
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Retry_Count : Natural;
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Old_Value : out Integer;
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Success_Flag : out Boolean)
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is
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pragma Warnings (Off, Retry_Count);
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begin
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SSL.Lock_Task.all;
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Old_Value := To.Value;
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To.Value := From_IU (To_IU (To.Value) or To_IU (From));
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Success_Flag := True;
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SSL.Unlock_Task.all;
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end Or_Atomic;
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|
|
procedure Or_Atomic
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(To : in out Aligned_Long_Integer;
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From : Long_Integer)
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is
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begin
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SSL.Lock_Task.all;
|
|
To.Value := From_LU (To_LU (To.Value) or To_LU (From));
|
|
SSL.Unlock_Task.all;
|
|
end Or_Atomic;
|
|
|
|
procedure Or_Atomic
|
|
(To : in out Aligned_Long_Integer;
|
|
From : Long_Integer;
|
|
Retry_Count : Natural;
|
|
Old_Value : out Long_Integer;
|
|
Success_Flag : out Boolean)
|
|
is
|
|
pragma Warnings (Off, Retry_Count);
|
|
|
|
begin
|
|
SSL.Lock_Task.all;
|
|
Old_Value := To.Value;
|
|
To.Value := From_LU (To_LU (To.Value) or To_LU (From));
|
|
Success_Flag := True;
|
|
SSL.Unlock_Task.all;
|
|
end Or_Atomic;
|
|
|
|
------------------------------------
|
|
-- Declarations for Queue Objects --
|
|
------------------------------------
|
|
|
|
type QR;
|
|
|
|
type QR_Ptr is access QR;
|
|
|
|
type QR is record
|
|
Forward : QR_Ptr;
|
|
Backward : QR_Ptr;
|
|
end record;
|
|
|
|
function To_QR_Ptr is new Ada.Unchecked_Conversion (Address, QR_Ptr);
|
|
function From_QR_Ptr is new Ada.Unchecked_Conversion (QR_Ptr, Address);
|
|
|
|
------------
|
|
-- Insqhi --
|
|
------------
|
|
|
|
procedure Insqhi
|
|
(Item : Address;
|
|
Header : Address;
|
|
Status : out Insq_Status)
|
|
is
|
|
Hedr : constant QR_Ptr := To_QR_Ptr (Header);
|
|
Next : constant QR_Ptr := Hedr.Forward;
|
|
Itm : constant QR_Ptr := To_QR_Ptr (Item);
|
|
|
|
begin
|
|
SSL.Lock_Task.all;
|
|
|
|
Itm.Forward := Next;
|
|
Itm.Backward := Hedr;
|
|
Hedr.Forward := Itm;
|
|
|
|
if Next = null then
|
|
Status := OK_First;
|
|
|
|
else
|
|
Next.Backward := Itm;
|
|
Status := OK_Not_First;
|
|
end if;
|
|
|
|
SSL.Unlock_Task.all;
|
|
end Insqhi;
|
|
|
|
------------
|
|
-- Remqhi --
|
|
------------
|
|
|
|
procedure Remqhi
|
|
(Header : Address;
|
|
Item : out Address;
|
|
Status : out Remq_Status)
|
|
is
|
|
Hedr : constant QR_Ptr := To_QR_Ptr (Header);
|
|
Next : constant QR_Ptr := Hedr.Forward;
|
|
|
|
begin
|
|
SSL.Lock_Task.all;
|
|
|
|
Item := From_QR_Ptr (Next);
|
|
|
|
if Next = null then
|
|
Status := Fail_Was_Empty;
|
|
|
|
else
|
|
Hedr.Forward := To_QR_Ptr (Item).Forward;
|
|
|
|
if Hedr.Forward = null then
|
|
Status := OK_Empty;
|
|
|
|
else
|
|
Hedr.Forward.Backward := Hedr;
|
|
Status := OK_Not_Empty;
|
|
end if;
|
|
end if;
|
|
|
|
SSL.Unlock_Task.all;
|
|
end Remqhi;
|
|
|
|
------------
|
|
-- Insqti --
|
|
------------
|
|
|
|
procedure Insqti
|
|
(Item : Address;
|
|
Header : Address;
|
|
Status : out Insq_Status)
|
|
is
|
|
Hedr : constant QR_Ptr := To_QR_Ptr (Header);
|
|
Prev : constant QR_Ptr := Hedr.Backward;
|
|
Itm : constant QR_Ptr := To_QR_Ptr (Item);
|
|
|
|
begin
|
|
SSL.Lock_Task.all;
|
|
|
|
Itm.Backward := Prev;
|
|
Itm.Forward := Hedr;
|
|
Hedr.Backward := Itm;
|
|
|
|
if Prev = null then
|
|
Status := OK_First;
|
|
|
|
else
|
|
Prev.Forward := Itm;
|
|
Status := OK_Not_First;
|
|
end if;
|
|
|
|
SSL.Unlock_Task.all;
|
|
end Insqti;
|
|
|
|
------------
|
|
-- Remqti --
|
|
------------
|
|
|
|
procedure Remqti
|
|
(Header : Address;
|
|
Item : out Address;
|
|
Status : out Remq_Status)
|
|
is
|
|
Hedr : constant QR_Ptr := To_QR_Ptr (Header);
|
|
Prev : constant QR_Ptr := Hedr.Backward;
|
|
|
|
begin
|
|
SSL.Lock_Task.all;
|
|
|
|
Item := From_QR_Ptr (Prev);
|
|
|
|
if Prev = null then
|
|
Status := Fail_Was_Empty;
|
|
|
|
else
|
|
Hedr.Backward := To_QR_Ptr (Item).Backward;
|
|
|
|
if Hedr.Backward = null then
|
|
Status := OK_Empty;
|
|
|
|
else
|
|
Hedr.Backward.Forward := Hedr;
|
|
Status := OK_Not_Empty;
|
|
end if;
|
|
end if;
|
|
|
|
SSL.Unlock_Task.all;
|
|
end Remqti;
|
|
|
|
end System.Aux_DEC;
|