+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
--- --
--- A D A . C A L E N D A R . D E L A Y S --
--- --
--- B o d y --
--- --
--- $Revision: 1.1 $
--- --
--- Copyright (C) 1991-2001 Florida State University --
--- --
--- 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, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, 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. It is --
--- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
--- State University (http://www.gnat.com). --
--- --
-------------------------------------------------------------------------------
-
-with System.OS_Primitives;
--- Used for Delay_Modes
--- Max_Sensible_Delay
-
-with System.Soft_Links;
--- Used for Timed_Delay
-
-package body Ada.Calendar.Delays is
-
- package OSP renames System.OS_Primitives;
- package SSL renames System.Soft_Links;
-
- use type SSL.Timed_Delay_Call;
-
- -- Earlier, the following operations were implemented using
- -- System.Time_Operations. The idea was to avoid sucking in the tasking
- -- packages. This did not work. Logically, we can't have it both ways.
- -- There is no way to implement time delays that will have correct task
- -- semantics without reference to the tasking run-time system.
- -- To achieve this goal, we now use soft links.
-
- -----------------------
- -- Local Subprograms --
- -----------------------
-
- procedure Timed_Delay_NT (Time : Duration; Mode : Integer);
- -- Timed delay procedure used when no tasking is active
-
- ---------------
- -- Delay_For --
- ---------------
-
- procedure Delay_For (D : Duration) is
- begin
- SSL.Timed_Delay.all (Duration'Min (D, OSP.Max_Sensible_Delay),
- OSP.Relative);
- end Delay_For;
-
- -----------------
- -- Delay_Until --
- -----------------
-
- procedure Delay_Until (T : Time) is
- begin
- SSL.Timed_Delay.all (To_Duration (T), OSP.Absolute_Calendar);
- end Delay_Until;
-
- --------------------
- -- Timed_Delay_NT --
- --------------------
-
- procedure Timed_Delay_NT (Time : Duration; Mode : Integer) is
- begin
- OSP.Timed_Delay (Time, Mode);
- end Timed_Delay_NT;
-
- -----------------
- -- To_Duration --
- -----------------
-
- function To_Duration (T : Time) return Duration is
- begin
- return Duration (T);
- end To_Duration;
-
-begin
- -- Set up the Timed_Delay soft link to the non tasking version
- -- if it has not been already set.
-
- -- If tasking is present, Timed_Delay has already set this soft
- -- link, or this will be overriden during the elaboration of
- -- System.Tasking.Initialization
-
- if SSL.Timed_Delay = null then
- SSL.Timed_Delay := Timed_Delay_NT'Access;
- end if;
-end Ada.Calendar.Delays;
projects / msp430-gcc.git / blobdiff