1 ------------------------------------------------------------------------------
3 -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- A D A . C A L E N D A R . D E L A Y S --
10 -- Copyright (C) 1991-2000 Florida State University --
12 -- GNARL is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNARL; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNARL was developed by the GNARL team at Florida State University. It is --
31 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
32 -- State University (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 -- This is the Alpha/VMS version.
38 with System.OS_Primitives;
39 -- Used for Max_Sensible_Delay
41 with System.Soft_Links;
42 -- Used for Timed_Delay
44 package body Ada.Calendar.Delays is
46 package OSP renames System.OS_Primitives;
47 package TSL renames System.Soft_Links;
49 use type TSL.Timed_Delay_Call;
55 procedure Delay_For (D : Duration) is
58 (Duration'Min (D, OSP.Max_Sensible_Delay), OSP.Relative);
65 procedure Delay_Until (T : Time) is
67 TSL.Timed_Delay.all (To_Duration (T), OSP.Absolute_Calendar);
74 function To_Duration (T : Time) return Duration is
76 return OSP.To_Duration (OSP.OS_Time (T), OSP.Absolute_Calendar);
83 procedure Timed_Delay_NT (Time : Duration; Mode : Integer);
85 procedure Timed_Delay_NT (Time : Duration; Mode : Integer) is
87 OSP.Timed_Delay (Time, Mode);
91 -- Set up the Timed_Delay soft link to the non tasking version if it has
92 -- not been already set.
93 -- If tasking is present, Timed_Delay has already set this soft link, or
94 -- this will be overriden during the elaboration of
95 -- System.Tasking.Initialization
97 if TSL.Timed_Delay = null then
98 TSL.Timed_Delay := Timed_Delay_NT'Access;
100 end Ada.Calendar.Delays;