gcc:
[official-gcc.git] / gcc / ada / s-restri.ads
blobd56a19f53642ce49064f1ab61197b1050987c0e7
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) 2004-2006, 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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
21 -- --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
28 -- --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
31 -- --
32 ------------------------------------------------------------------------------
34 -- This package provides a run-time interface for checking the set of
35 -- restrictions that applies to the current partition. The information
36 -- comes both from explicit restriction pragmas present, and also from
37 -- compile time checking.
39 -- The package simply contains an instantiation of System.Rident, but
40 -- with names discarded, so that we do not have image tables for the
41 -- large restriction enumeration types at run time.
43 with System.Rident;
45 package System.Restrictions is
46 pragma Preelaborate;
47 pragma Discard_Names;
48 package Rident is new System.Rident;
50 Run_Time_Restrictions : Rident.Restrictions_Info;
51 -- Restrictions as set by the user, or detected by the binder.
52 -- Note that a restriction which is both Set and Violated at run-time means
53 -- that the violation was detected as part of the Ada run-time and not
54 -- as part of user code.
56 ------------------
57 -- Subprograms --
58 -----------------
60 function Abort_Allowed return Boolean;
61 pragma Inline (Abort_Allowed);
62 -- Tests to see if abort is allowed by the current restrictions settings.
63 -- For abort to be allowed, either No_Abort_Statements must be False,
64 -- or Max_Asynchronous_Select_Nesting must be non-zero.
66 function Tasking_Allowed return Boolean;
67 pragma Inline (Tasking_Allowed);
68 -- Tests to see if tasking operations are allowed by the current
69 -- restrictions settings. For tasking to be allowed, No_Tasking
70 -- must be False, and Max_Tasks must not be set to zero.
72 end System.Restrictions;