File : gnatcom-utility.adb
------------------------------------------------------------------------------
-- --
-- GNATCOM - Ada 95 COM/DCOM/COM+ Development Framework and Tools --
-- --
-- G N A T C O M . U T I L I T Y --
-- --
-- B o d y --
-- --
-- $Revision: 1.3 $
-- --
-- Copyright (C) 1999, 2000, 2001 David Botton --
-- --
-- This 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. It is distributed in the hope that it will be useful, but WITHOUT --
-- 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 this; 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. --
-- --
-- More information about GNATCOM and the most current public version can --
-- be located on the web at http://www.adapower.com/gnatcom --
-- --
-- Support for GNATCOM is available from Ada Core Technologies, Inc. --
-- --
-- In the U.S., contact Ada Core Technologies at: --
-- Tel: +1 (212) 620 7300 ext 117 --
-- Fax: +1 (212) 807 0162 --
-- Email: sales@gnat.com --
-- --
-- In Europe and elsewhere, contact ACT Europe at: --
-- Tel: +33 1 49 70 67 16 --
-- Fax: +33 1 49 70 05 52 --
-- Email: sales@act-europe.fr --
------------------------------------------------------------------------------
with Interfaces.C;
with System;
package body GNATCOM.Utility is
WM_QUIT : constant := 18;
type POINTL is
record
x : Interfaces.C.long;
y : Interfaces.C.long;
end record;
pragma Convention (C_PASS_BY_COPY, POINTL);
type MSG is
record
hwnd : System.Address;
message : Interfaces.C.int;
wParam : Interfaces.C.int;
lParam : Interfaces.C.long;
time : Interfaces.C.unsigned_long;
pt : POINTL;
end record;
pragma Convention (C_PASS_BY_COPY, MSG);
type Pointer_To_MSG is access all MSG;
function GetMessage
(lpMsg : Pointer_To_MSG;
hwnd : Interfaces.C.long;
wMsgFilterMin : Interfaces.C.unsigned;
wMsgFilterMax : Interfaces.C.unsigned)
return Interfaces.C.long;
pragma Import (StdCall, GetMessage, "GetMessageA");
function DispatchMessage
(lpMsg : Pointer_To_MSG) return Interfaces.C.long;
pragma Import (StdCall, DispatchMessage, "DispatchMessageA");
function GetCurrentThreadId
return Interfaces.C.unsigned_long;
pragma Import (StdCall, GetCurrentThreadId, "GetCurrentThreadId");
procedure PostThreadMessage
(idThread : Interfaces.C.unsigned_long;
MSG : Interfaces.C.unsigned;
wParam : Interfaces.C.unsigned := 0;
lParam : Interfaces.C.long := 0);
pragma Import (StdCall, PostThreadMessage, "PostThreadMessageA");
procedure MessageBox
(hwnd : in Interfaces.C.long := 0;
Message : in Interfaces.C.char_array;
Title : in Interfaces.C.char_array;
uType : in Interfaces.C.unsigned := 0);
pragma Import (StdCall, MessageBox, "MessageBoxA");
function GetModuleFileName
(hInst : Interfaces.C.long;
lpszFileName : Interfaces.C.char_array;
cbFileName : Interfaces.C.int)
return Interfaces.C.int;
pragma Import (StdCall, GetModuleFileName, "GetModuleFileNameA");
---------------------------
-- Get_Current_Thread_ID --
---------------------------
function Get_Current_Thread_ID return Interfaces.C.unsigned_long
is
begin
return GetCurrentThreadId;
end Get_Current_Thread_ID;
------------------
-- Message_Loop --
------------------
procedure Message_Loop is
use type Interfaces.C.long;
lResult : Interfaces.C.long;
tMSG : aliased MSG;
pMSG : Pointer_To_MSG := tMSG'Unchecked_Access;
begin
while (GetMessage (pMSG, 0, 0, 0) /= 0) loop
lResult := DispatchMessage (pMSG);
end loop;
end Message_Loop;
---------------
-- Post_Quit --
---------------
procedure Post_Quit (Thread_ID : Interfaces.C.unsigned_long)
is
begin
PostThreadMessage (Thread_ID, WM_QUIT);
end Post_Quit;
---------------
-- Post_Quit --
---------------
procedure Post_Quit is
begin
Post_Quit (GetCurrentThreadId);
end Post_Quit;
-----------------
-- Message_Box --
-----------------
procedure Message_Box (Title, Message : String) is
BoxTitle : Interfaces.C.char_array := Interfaces.C.To_C (Title);
BoxMessage : Interfaces.C.char_array := Interfaces.C.To_C (Message);
begin
MessageBox (Message => BoxMessage,
Title => BoxTitle);
end Message_Box;
end GNATCOM.Utility;