File : s-restri.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- S Y S T E M . R E S T R I C T I O N S --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 2004-2013, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT 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 -- --
19 -- --
20 -- --
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 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 -- This package provides a run-time interface for checking the set of
33 -- restrictions that applies to the current partition. The information
34 -- comes both from explicit restriction pragmas present, and also from
35 -- compile time checking.
36
37 -- The package simply contains an instantiation of System.Rident, but
38 -- with names discarded, so that we do not have image tables for the
39 -- large restriction enumeration types at run time.
40
41 pragma Compiler_Unit_Warning;
42
43 with System.Rident;
44
45 package System.Restrictions is
46 pragma Preelaborate;
47
48 pragma Discard_Names;
49 package Rident is new System.Rident;
50 -- Instantiate a copy of System.Rident without enumeration image names
51
52 Run_Time_Restrictions : Rident.Restrictions_Info;
53 -- Restrictions as set by the user, or detected by the binder. See details
54 -- in package System.Rident for what restrictions are included in the list
55 -- and the format of the information.
56 --
57 -- Note that a restriction which is both Set and Violated at run-time means
58 -- that the violation was detected as part of the Ada run-time and not as
59 -- part of user code.
60
61 ------------------
62 -- Subprograms --
63 -----------------
64
65 function Abort_Allowed return Boolean;
66 pragma Inline (Abort_Allowed);
67 -- Tests to see if abort is allowed by the current restrictions settings.
68 -- For abort to be allowed, either No_Abort_Statements must be False, or
69 -- Max_Asynchronous_Select_Nesting must be non-zero.
70
71 function Tasking_Allowed return Boolean;
72 pragma Inline (Tasking_Allowed);
73 -- Tests to see if tasking operations are allowed by the current
74 -- restrictions settings. For tasking to be allowed, No_Tasking must
75 -- be False, and Max_Tasks must not be set to zero.
76
77 end System.Restrictions;