File : a-retide-raven.adb
1 ------------------------------------------------------------------------------
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) 2001-2010, AdaCore --
10 -- --
11 -- GNAT 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 3, or (at your option) any later ver- --
14 -- sion. GNAT 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. --
17 -- --
18 -- --
19 -- --
20 -- --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- GNARL was developed by the GNARL team at Florida State University. --
28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 with System.Task_Primitives.Operations;
33 -- Used for Timed_Delay
34 -- Self
35
36 package body Ada.Real_Time.Delays is
37
38 package STPO renames System.Task_Primitives.Operations;
39
40 -----------------
41 -- Delay_Until --
42 -----------------
43
44 procedure Delay_Until (T : Time) is
45 begin
46 -- pragma Detect_Blocking is mandatory in this run time, so that
47 -- Program_Error must be raised if this delay (potentially blocking
48 -- operation) is called from a protected operation.
49
50 if STPO.Self.Common.Protected_Action_Nesting > 0 then
51 raise Program_Error;
52 else
53 STPO.Delay_Until (STPO.Time (T));
54 end if;
55 end Delay_Until;
56
57 -----------------
58 -- To_Duration --
59 -----------------
60
61 -- This function is not supposed to be used by the Ravenscar run time and
62 -- it is not supposed to be with'ed by the user either (because it is an
63 -- internal GNAT unit). It is kept here (returning a junk value) just for
64 -- sharing the same package specification with the regular run time.
65
66 function To_Duration (T : Time) return Duration is
67 pragma Unreferenced (T);
68 begin
69 return 0.0;
70 end To_Duration;
71
72 end Ada.Real_Time.Delays;