| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1992-2005, 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 2, or (at your option) any later ver- -- |
| -- sion. GNARL 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 GNARL; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- |
| -- Boston, MA 02110-1301, 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. -- |
| -- -- |
| -- GNARL was developed by the GNARL team at Florida State University. -- |
| -- Extensive contributions were provided by Ada Core Technologies, Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with Ada.Exceptions; |
| -- Used for Raise_Exception |
| |
| with System.Tasking; |
| -- Used for Task_Id |
| |
| with System.Task_Primitives.Operations; |
| -- Used for Timed_Delay |
| -- Self |
| |
| 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; |
