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Diffstat (limited to 'gcc/ada/s-atocou-builtin.adb')
| -rw-r--r-- | gcc/ada/s-atocou-builtin.adb | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/gcc/ada/s-atocou-builtin.adb b/gcc/ada/s-atocou-builtin.adb deleted file mode 100644 index 36a939f..0000000 --- a/gcc/ada/s-atocou-builtin.adb +++ /dev/null @@ -1,111 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME COMPONENTS -- --- -- --- S Y S T E M . A T O M I C _ C O U N T E R S -- --- -- --- B o d y -- --- -- --- Copyright (C) 2011-2015, 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. -- --- -- ------------------------------------------------------------------------------- - --- This package implements Atomic_Counter and Atomic_Unsigned operations --- for platforms where GCC supports __sync_add_and_fetch_4 and --- __sync_sub_and_fetch_4 builtins. - -package body System.Atomic_Counters is - - procedure Sync_Add_And_Fetch - (Ptr : access Atomic_Unsigned; - Value : Atomic_Unsigned); - pragma Import (Intrinsic, Sync_Add_And_Fetch, "__sync_add_and_fetch_4"); - - function Sync_Sub_And_Fetch - (Ptr : access Atomic_Unsigned; - Value : Atomic_Unsigned) return Atomic_Unsigned; - pragma Import (Intrinsic, Sync_Sub_And_Fetch, "__sync_sub_and_fetch_4"); - - --------------- - -- Decrement -- - --------------- - - procedure Decrement (Item : aliased in out Atomic_Unsigned) is - begin - if Sync_Sub_And_Fetch (Item'Unrestricted_Access, 1) = 0 then - null; - end if; - end Decrement; - - function Decrement (Item : aliased in out Atomic_Unsigned) return Boolean is - begin - return Sync_Sub_And_Fetch (Item'Unrestricted_Access, 1) = 0; - end Decrement; - - function Decrement (Item : in out Atomic_Counter) return Boolean is - begin - -- Note: the use of Unrestricted_Access here is required because we - -- are obtaining an access-to-volatile pointer to a non-volatile object. - -- This is not allowed for [Unchecked_]Access, but is safe in this case - -- because we know that no aliases are being created. - - return Sync_Sub_And_Fetch (Item.Value'Unrestricted_Access, 1) = 0; - end Decrement; - - --------------- - -- Increment -- - --------------- - - procedure Increment (Item : aliased in out Atomic_Unsigned) is - begin - Sync_Add_And_Fetch (Item'Unrestricted_Access, 1); - end Increment; - - procedure Increment (Item : in out Atomic_Counter) is - begin - -- Note: the use of Unrestricted_Access here is required because we are - -- obtaining an access-to-volatile pointer to a non-volatile object. - -- This is not allowed for [Unchecked_]Access, but is safe in this case - -- because we know that no aliases are being created. - - Sync_Add_And_Fetch (Item.Value'Unrestricted_Access, 1); - end Increment; - - ---------------- - -- Initialize -- - ---------------- - - procedure Initialize (Item : out Atomic_Counter) is - begin - Item.Value := 1; - end Initialize; - - ------------ - -- Is_One -- - ------------ - - function Is_One (Item : Atomic_Counter) return Boolean is - begin - return Item.Value = 1; - end Is_One; - -end System.Atomic_Counters; |