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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . A T O M I C _ P R I M I T I V E S --
-- --
-- S p e c --
-- --
-- Copyright (C) 2012, Free Software Foundation, 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 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- ??? Need header saying what this unit is!!!
package System.Atomic_Primitives is
pragma Preelaborate;
type uint8 is mod 2**8
with Size => 8;
type uint16 is mod 2**16
with Size => 16;
type uint32 is mod 2**32
with Size => 32;
type uint64 is mod 2**64
with Size => 64;
Relaxed : constant := 0;
Consume : constant := 1;
Acquire : constant := 2;
Release : constant := 3;
Acq_Rel : constant := 4;
Seq_Cst : constant := 5;
Last : constant := 6;
subtype Mem_Model is Integer range Relaxed .. Last;
function Atomic_Compare_Exchange_8
(X : Address;
X_Old : uint8;
X_Copy : uint8) return Boolean;
pragma Import (Intrinsic,
Atomic_Compare_Exchange_8,
"__sync_bool_compare_and_swap_1");
-- ??? Should use __atomic_compare_exchange_1 (doesn't work yet):
-- function Atomic_Compare_Exchange_8
-- (X : Address;
-- X_Old : Address;
-- X_Copy : uint8;
-- Success_Model : Mem_Model := Seq_Cst;
-- Failure_Model : Mem_Model := Seq_Cst) return Boolean;
-- pragma Import (Intrinsic,
-- Atomic_Compare_Exchange_8,
-- "__atomic_compare_exchange_1");
function Atomic_Compare_Exchange_16
(X : Address;
X_Old : uint16;
X_Copy : uint16) return Boolean;
pragma Import (Intrinsic,
Atomic_Compare_Exchange_16,
"__sync_bool_compare_and_swap_2");
function Atomic_Compare_Exchange_32
(X : Address;
X_Old : uint32;
X_Copy : uint32) return Boolean;
pragma Import (Intrinsic,
Atomic_Compare_Exchange_32,
"__sync_bool_compare_and_swap_4");
function Atomic_Compare_Exchange_64
(X : Address;
X_Old : uint64;
X_Copy : uint64) return Boolean;
pragma Import (Intrinsic,
Atomic_Compare_Exchange_64,
"__sync_bool_compare_and_swap_8");
function Atomic_Load_8
(X : Address;
Model : Mem_Model := Seq_Cst) return uint8;
pragma Import (Intrinsic, Atomic_Load_8, "__atomic_load_1");
function Atomic_Load_16
(X : Address;
Model : Mem_Model := Seq_Cst) return uint16;
pragma Import (Intrinsic, Atomic_Load_16, "__atomic_load_2");
function Atomic_Load_32
(X : Address;
Model : Mem_Model := Seq_Cst) return uint32;
pragma Import (Intrinsic, Atomic_Load_32, "__atomic_load_4");
function Atomic_Load_64
(X : Address;
Model : Mem_Model := Seq_Cst) return uint64;
pragma Import (Intrinsic, Atomic_Load_64, "__atomic_load_8");
end System.Atomic_Primitives;
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