+ created from extgraph

rtl/win32/wincrt.pp

@@ -0,0 +1,136 @@
+{
+    $Id$
+    This file is part of the Free Pascal run time library.
+    Copyright (c) 1999 by Florian Klaempfl
+    member of the Free Pascal development team
+
+    This is unit implements some of the crt functionality
+    for the gui win32 graph unit implementation
+    
+    See the file COPYING.FPC, included in this distribution,
+    for details about the copyright.
+
+    This program 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.
+
+ **********************************************************************}
+unit wincrt;
+
+  interface
+
+    function readkey : char;
+    function keypressed : boolean;
+    procedure delay(ms : word);
+
+  var
+     directvideo : boolean;
+
+  implementation
+
+    uses
+       windows,graph;
+
+    const
+       keybuffersize = 16;
+
+    var
+       keyboardhandling : TCriticalSection;
+       keybuffer : array[1..keybuffersize] of char;
+       nextfree,nexttoread : longint;
+
+    procedure inccyclic(var i : longint);
+
+      begin
+         inc(i);
+         if i>keybuffersize then
+           i:=1;
+      end;
+
+    procedure addchar(c : char);
+
+      begin
+         EnterCriticalSection(keyboardhandling);
+         keybuffer[nextfree]:=c;
+         inccyclic(nextfree);
+         { skip old chars }
+         if nexttoread=nextfree then
+           inccyclic(nexttoread);
+         LeaveCriticalSection(keyboardhandling);
+      end;
+
+    function readkey : char;
+
+      begin
+         while true do
+           begin
+              EnterCriticalSection(keyboardhandling);
+              if nexttoread<>nextfree then
+                begin
+                   readkey:=keybuffer[nexttoread];
+                   inccyclic(nexttoread);
+                   LeaveCriticalSection(keyboardhandling);
+                   exit;
+                end;
+              LeaveCriticalSection(keyboardhandling);
+              { give other threads a chance }
+              Windows.Sleep(0);
+           end;
+      end;
+
+    function keypressed : boolean;
+
+      begin
+         EnterCriticalSection(keyboardhandling);
+         keypressed:=nexttoread<>nextfree;
+         LeaveCriticalSection(keyboardhandling);
+      end;
+
+    procedure delay(ms : word);
+
+      begin
+         Sleep(ms);
+      end;
+
+    function msghandler(Window: hwnd; AMessage, WParam,
+      LParam: Longint): Longint;
+
+      begin
+         case amessage of
+           WM_CHAR:
+             begin
+                addchar(chr(wparam));
+                writeln('got char message: ',wparam);
+             end;
+           WM_KEYDOWN:
+             begin
+
+                writeln('got key message');
+             end;
+         end;
+         msghandler:=0;
+      end;
+
+    var
+       oldexitproc : pointer;
+
+    procedure myexitproc;
+
+      begin
+         exitproc:=oldexitproc;
+         DeleteCriticalSection(keyboardhandling);
+      end;
+begin
+   charmessagehandler:=@msghandler;
+   nextfree:=1;
+   nexttoread:=1;
+   InitializeCriticalSection(keyboardhandling);
+   oldexitproc:=exitproc;
+   exitproc:=@myexitproc;
+end.
+{
+  $Log$
+  Revision 1.1  1999-11-24 22:33:15  florian
+    + created from extgraph
+
+}