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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . R E S T R I C T I O N S --
-- --
-- B o d y --
-- --
-- Copyright (C) 2004 Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
package body System.Restrictions is
use Rident;
-------------------
-- Abort_Allowed --
-------------------
function Abort_Allowed return Boolean is
begin
return Run_Time_Restrictions.Violated (No_Abort_Statements)
or else
Run_Time_Restrictions.Violated (Max_Asynchronous_Select_Nesting);
end Abort_Allowed;
---------------------
-- Tasking_Allowed --
---------------------
function Tasking_Allowed return Boolean is
begin
return Run_Time_Restrictions.Violated (Max_Tasks)
or else
Run_Time_Restrictions.Violated (No_Tasking);
end Tasking_Allowed;
-- Package elaboration code (acquire restrictions)
begin
Acquire_Restrictions : declare
subtype Big_String is String (Positive);
type Big_String_Ptr is access all Big_String;
RString : Big_String_Ptr;
pragma Import (C, RString, "__gl_restrictions");
P : Natural := 1;
-- Pointer to scan string
C : Character;
-- Next character from string
function Get_Char return Character;
-- Get next character from string
function Get_Natural return Natural;
-- Scan out natural value known to be in range, updating P past it
--------------
-- Get_Char --
--------------
function Get_Char return Character is
begin
P := P + 1;
return RString (P - 1);
end Get_Char;
-----------------
-- Get_Natural --
-----------------
function Get_Natural return Natural is
N : Natural := 0;
begin
while RString (P) in '0' .. '9' loop
N := N * 10 + (Character'Pos (Get_Char) - Character'Pos ('0'));
end loop;
return N;
end Get_Natural;
-- Start of processing for Acquire_Restrictions
begin
-- Acquire data corresponding to first R line
for R in All_Boolean_Restrictions loop
C := Get_Char;
if C = 'v' then
Run_Time_Restrictions.Violated (R) := True;
elsif C = 'r' then
Run_Time_Restrictions.Set (R) := True;
end if;
end loop;
-- Acquire data corresponding to second R line
for RP in All_Parameter_Restrictions loop
-- Acquire restrictions pragma information
if Get_Char = 'r' then
Run_Time_Restrictions.Set (RP) := True;
Run_Time_Restrictions.Value (RP) := Get_Natural;
end if;
-- Acquire restrictions violations information
if Get_Char = 'v' then
Run_Time_Restrictions.Violated (RP) := True;
Run_Time_Restrictions.Count (RP) := Get_Natural;
if RString (P) = '+' then
Run_Time_Restrictions.Unknown (RP) := True;
P := P + 1;
end if;
end if;
end loop;
end Acquire_Restrictions;
end System.Restrictions;
|
