msdos/dpmi.c

   1 /*
   2  * DPMI 0.9 emulation
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include "winbase.h"
  25 #include "callback.h"
  26 #include "wine/debug.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(int31);
  29
  30 DOSVM_TABLE Dosvm = { NULL, };
  31
  32 static HMODULE DosModule;
  33
  34 /**********************************************************************
  35  *          DPMI_LoadDosSystem
  36  */
  37 BOOL DPMI_LoadDosSystem(void)
  38 {
  39     if (DosModule) return TRUE;
  40     DosModule = LoadLibraryA( "winedos.dll" );
  41     if (!DosModule) {
  42         ERR("could not load winedos.dll, DOS subsystem unavailable\n");
  43         return FALSE;
  44     }
  45 #define GET_ADDR(func)  Dosvm.func = (void *)GetProcAddress(DosModule, #func);
  46
  47     GET_ADDR(LoadDosExe);
  48     GET_ADDR(SetTimer);
  49     GET_ADDR(GetTimer);
  50     GET_ADDR(inport);
  51     GET_ADDR(outport);
  52     GET_ADDR(ASPIHandler);
  53     GET_ADDR(EmulateInterruptPM);
  54     GET_ADDR(CallBuiltinHandler);
  55 #undef GET_ADDR
  56     return TRUE;
  57 }
  58
  59
  60 /***********************************************************************
  61  *           NetBIOSCall      (KERNEL.103)
  62  *
  63  */
  64 void WINAPI NetBIOSCall16( CONTEXT86 *context )
  65 {
  66     if (Dosvm.CallBuiltinHandler || DPMI_LoadDosSystem())
  67         Dosvm.CallBuiltinHandler( context, 0x5c );
  68 }