gcc/ada/libgnat/s-aotase.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                  System.Atomic_Operations.Test_And_Set                   --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                 Copyright (C) 2019-2024, Free Software Foundation, Inc.  --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with System.Atomic_Primitives; use System.Atomic_Primitives;
  33
  34 package body System.Atomic_Operations.Test_And_Set is
  35
  36    -------------------------
  37    -- Atomic_Test_And_Set --
  38    -------------------------
  39
  40    function Atomic_Test_And_Set
  41      (Item : aliased in out Test_And_Set_Flag) return Boolean is
  42    begin
  43       return Atomic_Test_And_Set (Item'Address);
  44    end Atomic_Test_And_Set;
  45
  46    ------------------
  47    -- Atomic_Clear --
  48    ------------------
  49
  50    procedure Atomic_Clear
  51      (Item : aliased in out Test_And_Set_Flag) is
  52    begin
  53       Atomic_Clear (Item'Address);
  54    end Atomic_Clear;
  55
  56    ------------------
  57    -- Is_Lock_Free --
  58    ------------------
  59
  60    function Is_Lock_Free (Item : aliased Test_And_Set_Flag) return Boolean is
  61       pragma Unreferenced (Item);
  62    begin
  63       return True;
  64    end Is_Lock_Free;
  65
  66 end System.Atomic_Operations.Test_And_Set;