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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- --
+-- A D A . R E A L _ T I M E . D E L A Y S --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 1992-2010, Free Software Foundation, Inc. --
+-- --
+-- GNARL 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/>. --
+-- --
+-- GNARL was developed by the GNARL team at Florida State University. --
+-- Extensive contributions were provided by Ada Core Technologies, Inc. --
+-- --
+------------------------------------------------------------------------------
+
+with Ada.Exceptions;
+
+with System.Tasking;
+with System.Task_Primitives.Operations;
+
+package body Ada.Real_Time.Delays is
+
+ package STPO renames System.Task_Primitives.Operations;
+
+ ----------------
+ -- Local Data --
+ ----------------
+
+ Absolute_RT : constant := 2;
+
+ -----------------
+ -- Delay_Until --
+ -----------------
+
+ procedure Delay_Until (T : Time) is
+ Self_Id : constant System.Tasking.Task_Id := STPO.Self;
+
+ begin
+ -- If pragma Detect_Blocking is active, Program_Error must be
+ -- raised if this potentially blocking operation is called from a
+ -- protected action.
+
+ if System.Tasking.Detect_Blocking
+ and then Self_Id.Common.Protected_Action_Nesting > 0
+ then
+ Ada.Exceptions.Raise_Exception
+ (Program_Error'Identity, "potentially blocking operation");
+ else
+ STPO.Timed_Delay (Self_Id, To_Duration (T), Absolute_RT);
+ end if;
+ end Delay_Until;
+
+ -----------------
+ -- To_Duration --
+ -----------------
+
+ function To_Duration (T : Time) return Duration is
+ begin
+ return To_Duration (Time_Span (T));
+ end To_Duration;
+
+end Ada.Real_Time.Delays;