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------------------------------------------------------------------------------
-- --
-- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . T I M E _ O P E R A T I O N S --
-- --
-- B o d y --
-- (Version for new GNARL) --
-- --
-- $Revision: 1.2 $ --
-- --
-- Copyright (C) 1991-1997, 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). --
-- --
------------------------------------------------------------------------------
-- This is a AIX (FSU THREADS) version of this package.
with System.Error_Reporting;
-- used for Shutdown
with System.OS_Interface;
with Interfaces.C;
with System.Task_Primitives.Operations;
-- used for Clock
-- Task_ID
-- Self
package body System.Time_Operations is
use System.Error_Reporting;
use System.OS_Interface;
use Interfaces.C;
use System.Task_Primitives.Operations;
-- For abortion safety, we need to
-- implement these using cond_timedwait. Use the service provided by
-- System.Task_Primitives.Operations.
-- -----------------
-- -- Delay_Until --
-- -----------------
procedure Delay_Until (Abs_Time : Duration) is
Self_ID : Task_ID;
Timed_Out : Boolean;
Result : Interfaces.C.int;
begin
if Abs_Time <= Clock then
Result := sched_yield;
return;
end if;
Self_ID := Self;
Write_Lock (Self_ID);
Sleep_Until (Self_ID, Abs_Time, Timed_Out);
Unlock (Self_ID);
end Delay_Until;
---------------
-- Delay_For --
---------------
procedure Delay_For (Rel_Time : Duration) is
begin
Delay_Until (Clock + Rel_Time);
end Delay_For;
end System.Time_Operations;
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