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Diffstat (limited to 'gcc/ada/a-sytaco.ads')
| -rw-r--r-- | gcc/ada/a-sytaco.ads | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/gcc/ada/a-sytaco.ads b/gcc/ada/a-sytaco.ads new file mode 100644 index 00000000000..81369b56c24 --- /dev/null +++ b/gcc/ada/a-sytaco.ads @@ -0,0 +1,71 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . S Y N C H R O N O U S _ T A S K _ C O N T R O L -- +-- -- +-- S p e c -- +-- -- +-- $Revision: 1.11 $ -- +-- -- +-- Copyright (C) 1992-1998 Free Software Foundation, Inc. -- +-- -- +-- This specification is derived from the Ada Reference Manual for use with -- +-- GNAT. The copyright notice above, and the license provisions that follow -- +-- apply solely to the contents of the part following the private keyword. -- +-- -- +-- 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 2, 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. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +with System; + +package Ada.Synchronous_Task_Control is + + type Suspension_Object is limited private; + + procedure Set_True (S : in out Suspension_Object); + + procedure Set_False (S : in out Suspension_Object); + + function Current_State (S : Suspension_Object) return Boolean; + + procedure Suspend_Until_True (S : in out Suspension_Object); + +private + + -- ??? Using a protected object is overkill; suspension could be + -- implemented more efficiently. + + protected type Suspension_Object is + entry Wait; + procedure Set_False; + procedure Set_True; + function Get_Open return Boolean; + entry Wait_Exception; + + pragma Priority (System.Any_Priority'Last); + private + Open : Boolean := False; + end Suspension_Object; + +end Ada.Synchronous_Task_Control; |