Add an UNSPEC_PROLOGUE_USE to prevent the link register from being considered dead.
[official-gcc.git] / gcc / ada / i-os2lib.adb
blobc123725a5b2dacc9090b0ae169bc321b69071923
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- I N T E R F A C E S . O S 2 L I B --
6 -- --
7 -- B o d y --
8 -- --
9 -- --
10 -- Copyright (C) 1993-1999 Free Software Foundation, Inc. --
11 -- --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
22 -- --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
29 -- --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 -- --
33 ------------------------------------------------------------------------------
35 with Interfaces.OS2Lib.Errors;
37 package body Interfaces.OS2Lib is
39 pragma Warnings (Off, Errors);
40 package IOE renames Interfaces.OS2Lib.Errors;
42 -------------------
43 -- Must_Not_Fail --
44 -------------------
46 procedure Must_Not_Fail (Return_Code : APIRET) is
47 begin
48 pragma Assert (Return_Code = IOE.NO_ERROR);
49 null;
50 end Must_Not_Fail;
52 -----------------------
53 -- Sem_Must_Not_Fail --
54 -----------------------
56 procedure Sem_Must_Not_Fail (Return_Code : OS2Lib.APIRET) is
57 begin
58 pragma Assert
59 (Return_Code = IOE.NO_ERROR
60 or else
61 Return_Code = IOE.ERROR_ALREADY_POSTED
62 or else
63 Return_Code = IOE.ERROR_ALREADY_RESET);
64 null;
65 end Sem_Must_Not_Fail;
67 end Interfaces.OS2Lib;