1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--               System.Atomic_Operations.Integer_Arithmetic                --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--                 Copyright (C) 2019-2020, Free Software Foundation, Inc.  --
10--                                                                          --
11-- This specification is derived from the Ada Reference Manual for use with --
12-- GNAT. The copyright notice above, and the license provisions that follow --
13-- apply solely to the  contents of the part following the private keyword. --
14--                                                                          --
15-- GNAT is free software;  you can  redistribute it  and/or modify it under --
16-- terms of the  GNU General Public License as published  by the Free Soft- --
17-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
18-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
19-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
20-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
21--                                                                          --
22-- As a special exception under Section 7 of GPL version 3, you are granted --
23-- additional permissions described in the GCC Runtime Library Exception,   --
24-- version 3.1, as published by the Free Software Foundation.               --
25--                                                                          --
26-- You should have received a copy of the GNU General Public License and    --
27-- a copy of the GCC Runtime Library Exception along with this program;     --
28-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
29-- <http://www.gnu.org/licenses/>.                                          --
30--                                                                          --
31-- GNAT was originally developed  by the GNAT team at  New York University. --
32-- Extensive contributions were provided by Ada Core Technologies Inc.      --
33--                                                                          --
34------------------------------------------------------------------------------
35
36generic
37   type Atomic_Type is range <> with Atomic;
38package System.Atomic_Operations.Integer_Arithmetic
39  with Pure
40is
41   procedure Atomic_Add
42     (Item  : aliased in out Atomic_Type;
43      Value : Atomic_Type) with Convention => Intrinsic;
44
45   procedure Atomic_Subtract
46     (Item  : aliased in out Atomic_Type;
47      Value : Atomic_Type) with Convention => Intrinsic;
48
49   function Atomic_Fetch_And_Add
50     (Item  : aliased in out Atomic_Type;
51      Value : Atomic_Type) return Atomic_Type with Convention => Intrinsic;
52
53   function Atomic_Fetch_And_Subtract
54     (Item  : aliased in out Atomic_Type;
55      Value : Atomic_Type) return Atomic_Type with Convention => Intrinsic;
56
57   function Is_Lock_Free
58     (Item : aliased Atomic_Type) return Boolean with Convention => Intrinsic;
59
60private
61   pragma Inline_Always (Atomic_Add);
62   pragma Inline_Always (Atomic_Subtract);
63   pragma Inline_Always (Atomic_Fetch_And_Add);
64   pragma Inline_Always (Atomic_Fetch_And_Subtract);
65   pragma Inline_Always (Is_Lock_Free);
66end System.Atomic_Operations.Integer_Arithmetic;
67