107 lines
4.2 KiB
Ada
107 lines
4.2 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- 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 --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2020, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Ada.Exceptions;
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with System.Tasking;
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with System.Task_Primitives.Operations;
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package body Ada.Synchronous_Task_Control with
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SPARK_Mode => Off
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is
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----------------
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-- Initialize --
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----------------
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procedure Initialize (S : in out Suspension_Object) is
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begin
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System.Task_Primitives.Operations.Initialize (S.SO);
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end Initialize;
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--------------
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-- Finalize --
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--------------
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procedure Finalize (S : in out Suspension_Object) is
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begin
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System.Task_Primitives.Operations.Finalize (S.SO);
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end Finalize;
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-------------------
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-- Current_State --
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-------------------
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function Current_State (S : Suspension_Object) return Boolean is
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begin
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return System.Task_Primitives.Operations.Current_State (S.SO);
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end Current_State;
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---------------
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-- Set_False --
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---------------
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procedure Set_False (S : in out Suspension_Object) is
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begin
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System.Task_Primitives.Operations.Set_False (S.SO);
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end Set_False;
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--------------
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-- Set_True --
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--------------
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procedure Set_True (S : in out Suspension_Object) is
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begin
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System.Task_Primitives.Operations.Set_True (S.SO);
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end Set_True;
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------------------------
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-- Suspend_Until_True --
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------------------------
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procedure Suspend_Until_True (S : in out Suspension_Object) is
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begin
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-- This is a potentially blocking (see ARM D.10, par. 10), so that
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-- if pragma Detect_Blocking is active then Program_Error must be
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-- raised if this operation is called from a protected action.
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if System.Tasking.Detect_Blocking
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and then System.Tasking.Self.Common.Protected_Action_Nesting > 0
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then
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Ada.Exceptions.Raise_Exception
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(Program_Error'Identity, "potentially blocking operation");
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end if;
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System.Task_Primitives.Operations.Suspend_Until_True (S.SO);
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end Suspend_Until_True;
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end Ada.Synchronous_Task_Control;
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