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Diffstat (limited to 'gcc/ada/s-atopri.ads')
| -rw-r--r-- | gcc/ada/s-atopri.ads | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/gcc/ada/s-atopri.ads b/gcc/ada/s-atopri.ads new file mode 100644 index 00000000000..c8c75f2ff72 --- /dev/null +++ b/gcc/ada/s-atopri.ads @@ -0,0 +1,122 @@ +------------------------------------------------------------------------------ +-- -- +-- 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; |