1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT LIBRARY COMPONENTS                          --
4--                                                                          --
5--            G N A T . M O S T _ R E C E N T _ E X C E P T I O N           --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--                     Copyright (C) 2000-2010, AdaCore                     --
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------------------------------------------------------------------------------
31
32with Ada.Exceptions.Is_Null_Occurrence;
33with System.Soft_Links;
34
35package body GNAT.Most_Recent_Exception is
36
37   ----------------
38   -- Occurrence --
39   ----------------
40
41   function Occurrence return Ada.Exceptions.Exception_Occurrence is
42      EOA : constant Ada.Exceptions.Exception_Occurrence_Access :=
43              GNAT.Most_Recent_Exception.Occurrence_Access;
44
45      use type Ada.Exceptions.Exception_Occurrence_Access;
46
47   begin
48      return Result : Ada.Exceptions.Exception_Occurrence do
49         if EOA = null then
50            Ada.Exceptions.Save_Occurrence
51              (Target => Result,
52               Source => Ada.Exceptions.Null_Occurrence);
53         else
54            Ada.Exceptions.Save_Occurrence
55              (Target => Result,
56               Source => EOA.all);
57         end if;
58      end return;
59   end Occurrence;
60
61   -----------------------
62   -- Occurrence_Access --
63   -----------------------
64
65   function Occurrence_Access
66     return Ada.Exceptions.Exception_Occurrence_Access
67   is
68      use Ada.Exceptions;
69
70      EOA : constant Exception_Occurrence_Access :=
71              System.Soft_Links.Get_Current_Excep.all;
72
73   begin
74      if EOA = null then
75         return null;
76
77      elsif Is_Null_Occurrence (EOA.all) then
78         return null;
79
80      else
81         return EOA;
82      end if;
83   end Occurrence_Access;
84
85end GNAT.Most_Recent_Exception;
86