Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnarl/a-dispat.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 -- A D A . D I S P A T C H I N G -- | |
| 6 -- -- | |
| 7 -- B o d y -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 2015-2017, 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 with Ada.Exceptions; | |
| 33 with System.Tasking; | |
| 34 with System.Task_Primitives.Operations; | |
| 35 | |
| 36 package body Ada.Dispatching is | |
| 37 | |
| 38 procedure Yield is | |
| 39 Self_Id : constant System.Tasking.Task_Id := | |
| 40 System.Task_Primitives.Operations.Self; | |
| 41 | |
| 42 begin | |
| 43 -- If pragma Detect_Blocking is active, Program_Error must be | |
| 44 -- raised if this potentially blocking operation is called from a | |
| 45 -- protected action. | |
| 46 | |
| 47 if System.Tasking.Detect_Blocking | |
| 48 and then Self_Id.Common.Protected_Action_Nesting > 0 | |
| 49 then | |
| 50 Ada.Exceptions.Raise_Exception | |
| 51 (Program_Error'Identity, "potentially blocking operation"); | |
| 52 else | |
| 53 System.Task_Primitives.Operations.Yield; | |
| 54 end if; | |
| 55 end Yield; | |
| 56 | |
| 57 end Ada.Dispatching; |