1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- A D A . R E A L _ T I M E . D E L A Y S --
9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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. --
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. --
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/>. --
27 -- GNARL was developed by the GNARL team at Florida State University. --
28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
30 ------------------------------------------------------------------------------
35 with System
.Task_Primitives
.Operations
;
37 package body Ada
.Real_Time
.Delays
is
39 package STPO
renames System
.Task_Primitives
.Operations
;
45 Absolute_RT
: constant := 2;
51 procedure Delay_Until
(T
: Time
) is
52 Self_Id
: constant System
.Tasking
.Task_Id
:= STPO
.Self
;
55 -- If pragma Detect_Blocking is active, Program_Error must be
56 -- raised if this potentially blocking operation is called from a
59 if System
.Tasking
.Detect_Blocking
60 and then Self_Id
.Common
.Protected_Action_Nesting
> 0
62 Ada
.Exceptions
.Raise_Exception
63 (Program_Error
'Identity, "potentially blocking operation");
65 STPO
.Timed_Delay
(Self_Id
, To_Duration
(T
), Absolute_RT
);
73 function To_Duration
(T
: Time
) return Duration is
75 return To_Duration
(Time_Span
(T
));
78 end Ada
.Real_Time
.Delays
;