| 1 | ------------------------------------------------------------------------------
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| 2 | -- --
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| 3 | -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
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| 4 | -- --
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| 5 | -- A D A . C A L E N D A R . D E L A Y S --
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| 6 | -- --
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| 7 | -- B o d y --
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| 8 | -- --
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| 9 | -- $Revision: 1.1 $
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| 10 | -- --
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| 11 | -- Copyright (C) 1991-2000 Florida State University --
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| 12 | -- --
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| 13 | -- GNARL is free software; you can redistribute it and/or modify it under --
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| 14 | -- terms of the GNU General Public License as published by the Free Soft- --
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| 15 | -- ware Foundation; either version 2, or (at your option) any later ver- --
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| 16 | -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
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| 17 | -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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| 18 | -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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| 19 | -- for more details. You should have received a copy of the GNU General --
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| 20 | -- Public License distributed with GNARL; see file COPYING. If not, write --
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| 21 | -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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| 22 | -- MA 02111-1307, USA. --
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| 23 | -- --
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| 24 | -- As a special exception, if other files instantiate generics from this --
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| 25 | -- unit, or you link this unit with other files to produce an executable, --
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| 26 | -- this unit does not by itself cause the resulting executable to be --
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| 27 | -- covered by the GNU General Public License. This exception does not --
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| 28 | -- however invalidate any other reasons why the executable file might be --
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| 29 | -- covered by the GNU Public License. --
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| 30 | -- --
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| 31 | -- GNARL was developed by the GNARL team at Florida State University. It is --
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| 32 | -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
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| 33 | -- State University (http://www.gnat.com). --
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| 34 | -- --
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| 35 | ------------------------------------------------------------------------------
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| 36 |
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| 37 | -- This is the Alpha/VMS version.
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| 38 |
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| 39 | with System.OS_Primitives;
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| 40 | -- Used for Max_Sensible_Delay
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| 41 |
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| 42 | with System.Soft_Links;
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| 43 | -- Used for Timed_Delay
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| 44 |
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| 45 | package body Ada.Calendar.Delays is
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| 46 |
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| 47 | package OSP renames System.OS_Primitives;
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| 48 | package TSL renames System.Soft_Links;
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| 49 |
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| 50 | use type TSL.Timed_Delay_Call;
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| 51 |
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| 52 | ---------------
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| 53 | -- Delay_For --
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| 54 | ---------------
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| 55 |
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| 56 | procedure Delay_For (D : Duration) is
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| 57 | begin
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| 58 | TSL.Timed_Delay.all
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| 59 | (Duration'Min (D, OSP.Max_Sensible_Delay), OSP.Relative);
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| 60 | end Delay_For;
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| 61 |
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| 62 | -----------------
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| 63 | -- Delay_Until --
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| 64 | -----------------
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| 65 |
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| 66 | procedure Delay_Until (T : Time) is
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| 67 | begin
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| 68 | TSL.Timed_Delay.all (To_Duration (T), OSP.Absolute_Calendar);
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| 69 | end Delay_Until;
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| 70 |
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| 71 | -----------------
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| 72 | -- To_Duration --
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| 73 | -----------------
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| 74 |
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| 75 | function To_Duration (T : Time) return Duration is
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| 76 | begin
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| 77 | return OSP.To_Duration (OSP.OS_Time (T), OSP.Absolute_Calendar);
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| 78 | end To_Duration;
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| 79 |
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| 80 | --------------------
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| 81 | -- Timed_Delay_NT --
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| 82 | --------------------
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| 83 |
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| 84 | procedure Timed_Delay_NT (Time : Duration; Mode : Integer);
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| 85 |
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| 86 | procedure Timed_Delay_NT (Time : Duration; Mode : Integer) is
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| 87 | begin
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| 88 | OSP.Timed_Delay (Time, Mode);
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| 89 | end Timed_Delay_NT;
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| 90 |
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| 91 | begin
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| 92 | -- Set up the Timed_Delay soft link to the non tasking version if it has
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| 93 | -- not been already set.
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| 94 | -- If tasking is present, Timed_Delay has already set this soft link, or
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| 95 | -- this will be overriden during the elaboration of
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| 96 | -- System.Tasking.Initialization
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| 97 |
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| 98 | if TSL.Timed_Delay = null then
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| 99 | TSL.Timed_Delay := Timed_Delay_NT'Access;
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| 100 | end if;
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| 101 | end Ada.Calendar.Delays;
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