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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) 2004-2011, 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 -- 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 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
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.
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.
41 pragma Compiler_Unit;
43 with System.Rident;
45 package System.Restrictions is
46 pragma Preelaborate;
48 pragma Discard_Names;
49 package Rident is new System.Rident;
51 Run_Time_Restrictions : Rident.Restrictions_Info;
52 -- Restrictions as set by the user, or detected by the binder. See details
53 -- in package System.Rident for what restrictions are included in the list
54 -- and the format of the information.
56 -- Note that a restriction which is both Set and Violated at run-time means
57 -- that the violation was detected as part of the Ada run-time and not
58 -- as part of user code.
60 ------------------
61 -- Subprograms --
62 -----------------
64 function Abort_Allowed return Boolean;
65 pragma Inline (Abort_Allowed);
66 -- Tests to see if abort is allowed by the current restrictions settings.
67 -- For abort to be allowed, either No_Abort_Statements must be False,
68 -- or Max_Asynchronous_Select_Nesting must be non-zero.
70 function Tasking_Allowed return Boolean;
71 pragma Inline (Tasking_Allowed);
72 -- Tests to see if tasking operations are allowed by the current
73 -- restrictions settings. For tasking to be allowed, No_Tasking
74 -- must be False, and Max_Tasks must not be set to zero.
76 end System.Restrictions;