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   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                  System.Atomic_Operations.Test_And_Set                   --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                 Copyright (C) 2019-2024, 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
  36 package System.Atomic_Operations.Test_And_Set
  37   with Pure
  38 is
  39    type Test_And_Set_Flag is mod 2 ** 8
  40      with Atomic, Default_Value => 0, Size => 8;
  41
  42    function Atomic_Test_And_Set
  43      (Item : aliased in out Test_And_Set_Flag) return Boolean
  44      with Convention => Intrinsic;
  45
  46    procedure Atomic_Clear
  47      (Item : aliased in out Test_And_Set_Flag)
  48      with Convention => Intrinsic;
  49
  50    function Is_Lock_Free
  51      (Item : aliased Test_And_Set_Flag) return Boolean
  52      with Convention => Intrinsic;
  53
  54 private
  55    pragma Inline_Always (Atomic_Test_And_Set);
  56    pragma Inline_Always (Atomic_Clear);
  57    pragma Inline_Always (Is_Lock_Free);
  58 end System.Atomic_Operations.Test_And_Set;