Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/s-atocou.adb @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 68:561a7518be6b | 111:04ced10e8804 |
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| 1 ------------------------------------------------------------------------------ | |
| 2 -- -- | |
| 3 -- GNAT RUN-TIME COMPONENTS -- | |
| 4 -- -- | |
| 5 -- S Y S T E M . A T O M I C _ C O U N T E R S -- | |
| 6 -- -- | |
| 7 -- B o d y -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 2011-2017, 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 -- This is version of the package, for use on platforms where this capability | |
| 33 -- is not supported. All Atomic_Counter operations raises Program_Error, | |
| 34 -- Atomic_Unsigned operations processed in non-atomic manner. | |
| 35 | |
| 36 package body System.Atomic_Counters is | |
| 37 | |
| 38 --------------- | |
| 39 -- Decrement -- | |
| 40 --------------- | |
| 41 | |
| 42 function Decrement (Item : in out Atomic_Counter) return Boolean is | |
| 43 begin | |
| 44 raise Program_Error; | |
| 45 return False; | |
| 46 end Decrement; | |
| 47 | |
| 48 function Decrement (Item : aliased in out Atomic_Unsigned) return Boolean is | |
| 49 begin | |
| 50 -- Could not use Item := Item - 1; because it is disabled in spec. | |
| 51 Item := Atomic_Unsigned'Pred (Item); | |
| 52 return Item = 0; | |
| 53 end Decrement; | |
| 54 | |
| 55 procedure Decrement (Item : aliased in out Atomic_Unsigned) is | |
| 56 begin | |
| 57 Item := Atomic_Unsigned'Pred (Item); | |
| 58 end Decrement; | |
| 59 | |
| 60 --------------- | |
| 61 -- Increment -- | |
| 62 --------------- | |
| 63 | |
| 64 procedure Increment (Item : in out Atomic_Counter) is | |
| 65 begin | |
| 66 raise Program_Error; | |
| 67 end Increment; | |
| 68 | |
| 69 procedure Increment (Item : aliased in out Atomic_Unsigned) is | |
| 70 begin | |
| 71 Item := Atomic_Unsigned'Succ (Item); | |
| 72 end Increment; | |
| 73 | |
| 74 ---------------- | |
| 75 -- Initialize -- | |
| 76 ---------------- | |
| 77 | |
| 78 procedure Initialize (Item : out Atomic_Counter) is | |
| 79 begin | |
| 80 raise Program_Error; | |
| 81 end Initialize; | |
| 82 | |
| 83 ------------ | |
| 84 -- Is_One -- | |
| 85 ------------ | |
| 86 | |
| 87 function Is_One (Item : Atomic_Counter) return Boolean is | |
| 88 begin | |
| 89 raise Program_Error; | |
| 90 return False; | |
| 91 end Is_One; | |
| 92 | |
| 93 end System.Atomic_Counters; |