1------------------------------------------------------------------------------
2--                                                                          --
3--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4--                                                                          --
5--                  SYSTEM.TASKING.ASYNC_DELAYS.ENQUEUE_RT                  --
6--                                                                          --
7--                                B o d y                                   --
8--                                                                          --
9--          Copyright (C) 1998-2020, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNARL 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-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
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
32with Ada.Real_Time;
33with Ada.Real_Time.Delays;
34with System.Task_Primitives.Operations;
35with System.Tasking.Initialization;
36
37function System.Tasking.Async_Delays.Enqueue_RT
38  (T : Ada.Real_Time.Time;
39   D : Delay_Block_Access) return Boolean
40is
41   use type Ada.Real_Time.Time;  -- for "=" operator
42begin
43   if T <= Ada.Real_Time.Clock then
44      D.Timed_Out := True;
45      System.Task_Primitives.Operations.Yield;
46      return False;
47   end if;
48
49   System.Tasking.Initialization.Defer_Abort
50     (System.Task_Primitives.Operations.Self);
51   Time_Enqueue (Ada.Real_Time.Delays.To_Duration (T), D);
52   return True;
53end System.Tasking.Async_Delays.Enqueue_RT;
54