| 1 |
12 |
jlechner |
------------------------------------------------------------------------------
|
| 2 |
|
|
-- --
|
| 3 |
|
|
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
|
| 4 |
|
|
-- --
|
| 5 |
|
|
-- A D A . R E A L _ T I M E . D E L A Y S --
|
| 6 |
|
|
-- --
|
| 7 |
|
|
-- B o d y --
|
| 8 |
|
|
-- --
|
| 9 |
|
|
-- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
|
| 10 |
|
|
-- --
|
| 11 |
|
|
-- GNARL is free software; you can redistribute it and/or modify it under --
|
| 12 |
|
|
-- terms of the GNU General Public License as published by the Free Soft- --
|
| 13 |
|
|
-- ware Foundation; either version 2, or (at your option) any later ver- --
|
| 14 |
|
|
-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
|
| 15 |
|
|
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
|
| 16 |
|
|
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
|
| 17 |
|
|
-- for more details. You should have received a copy of the GNU General --
|
| 18 |
|
|
-- Public License distributed with GNARL; see file COPYING. If not, write --
|
| 19 |
|
|
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
|
| 20 |
|
|
-- Boston, MA 02110-1301, USA. --
|
| 21 |
|
|
-- --
|
| 22 |
|
|
-- As a special exception, if other files instantiate generics from this --
|
| 23 |
|
|
-- unit, or you link this unit with other files to produce an executable, --
|
| 24 |
|
|
-- this unit does not by itself cause the resulting executable to be --
|
| 25 |
|
|
-- covered by the GNU General Public License. This exception does not --
|
| 26 |
|
|
-- however invalidate any other reasons why the executable file might be --
|
| 27 |
|
|
-- covered by the GNU Public License. --
|
| 28 |
|
|
-- --
|
| 29 |
|
|
-- GNARL was developed by the GNARL team at Florida State University. --
|
| 30 |
|
|
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
|
| 31 |
|
|
-- --
|
| 32 |
|
|
------------------------------------------------------------------------------
|
| 33 |
|
|
|
| 34 |
|
|
with Ada.Exceptions;
|
| 35 |
|
|
-- Used for Raise_Exception
|
| 36 |
|
|
|
| 37 |
|
|
with System.Tasking;
|
| 38 |
|
|
-- Used for Task_Id
|
| 39 |
|
|
|
| 40 |
|
|
with System.Task_Primitives.Operations;
|
| 41 |
|
|
-- Used for Timed_Delay
|
| 42 |
|
|
-- Self
|
| 43 |
|
|
|
| 44 |
|
|
package body Ada.Real_Time.Delays is
|
| 45 |
|
|
|
| 46 |
|
|
package STPO renames System.Task_Primitives.Operations;
|
| 47 |
|
|
|
| 48 |
|
|
----------------
|
| 49 |
|
|
-- Local Data --
|
| 50 |
|
|
----------------
|
| 51 |
|
|
|
| 52 |
|
|
Absolute_RT : constant := 2;
|
| 53 |
|
|
|
| 54 |
|
|
-----------------
|
| 55 |
|
|
-- Delay_Until --
|
| 56 |
|
|
-----------------
|
| 57 |
|
|
|
| 58 |
|
|
procedure Delay_Until (T : Time) is
|
| 59 |
|
|
Self_Id : constant System.Tasking.Task_Id := STPO.Self;
|
| 60 |
|
|
|
| 61 |
|
|
begin
|
| 62 |
|
|
-- If pragma Detect_Blocking is active, Program_Error must be
|
| 63 |
|
|
-- raised if this potentially blocking operation is called from a
|
| 64 |
|
|
-- protected action.
|
| 65 |
|
|
|
| 66 |
|
|
if System.Tasking.Detect_Blocking
|
| 67 |
|
|
and then Self_Id.Common.Protected_Action_Nesting > 0
|
| 68 |
|
|
then
|
| 69 |
|
|
Ada.Exceptions.Raise_Exception
|
| 70 |
|
|
(Program_Error'Identity, "potentially blocking operation");
|
| 71 |
|
|
else
|
| 72 |
|
|
STPO.Timed_Delay (Self_Id, To_Duration (T), Absolute_RT);
|
| 73 |
|
|
end if;
|
| 74 |
|
|
end Delay_Until;
|
| 75 |
|
|
|
| 76 |
|
|
-----------------
|
| 77 |
|
|
-- To_Duration --
|
| 78 |
|
|
-----------------
|
| 79 |
|
|
|
| 80 |
|
|
function To_Duration (T : Time) return Duration is
|
| 81 |
|
|
begin
|
| 82 |
|
|
return To_Duration (Time_Span (T));
|
| 83 |
|
|
end To_Duration;
|
| 84 |
|
|
|
| 85 |
|
|
end Ada.Real_Time.Delays;
|
