94 lines
4.2 KiB
Ada
94 lines
4.2 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- 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 --
|
|
-- --
|
|
-- Copyright (C) 1992-2014, 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 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. --
|
|
-- --
|
|
------------------------------------------------------------------------------
|
|
|
|
with System.Task_Primitives;
|
|
|
|
with Ada.Finalization;
|
|
with Ada.Task_Identification;
|
|
|
|
package Ada.Synchronous_Task_Control with
|
|
SPARK_Mode
|
|
is
|
|
pragma Preelaborate;
|
|
-- In accordance with Ada 2005 AI-362
|
|
|
|
type Suspension_Object is limited private;
|
|
|
|
procedure Set_True (S : in out Suspension_Object) with
|
|
Global => null,
|
|
Depends => (S => null,
|
|
null => S);
|
|
|
|
procedure Set_False (S : in out Suspension_Object) with
|
|
Global => null,
|
|
Depends => (S => null,
|
|
null => S);
|
|
|
|
function Current_State (S : Suspension_Object) return Boolean with
|
|
Volatile_Function,
|
|
Global => Ada.Task_Identification.Tasking_State;
|
|
|
|
procedure Suspend_Until_True (S : in out Suspension_Object) with
|
|
Global => null,
|
|
Depends => (S => null,
|
|
null => S);
|
|
|
|
private
|
|
pragma SPARK_Mode (Off);
|
|
|
|
procedure Initialize (S : in out Suspension_Object);
|
|
-- Initialization for Suspension_Object
|
|
|
|
procedure Finalize (S : in out Suspension_Object);
|
|
-- Finalization for Suspension_Object
|
|
|
|
type Suspension_Object is
|
|
new Ada.Finalization.Limited_Controlled with
|
|
record
|
|
SO : System.Task_Primitives.Suspension_Object;
|
|
-- Use low-level suspension objects so that the synchronization
|
|
-- functionality provided by this object can be achieved using
|
|
-- efficient operating system primitives.
|
|
end record;
|
|
|
|
pragma Inline (Set_True);
|
|
pragma Inline (Set_False);
|
|
pragma Inline (Current_State);
|
|
pragma Inline (Suspend_Until_True);
|
|
pragma Inline (Initialize);
|
|
pragma Inline (Finalize);
|
|
|
|
end Ada.Synchronous_Task_Control;
|