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{
System independent system interface for go32v2
Copyright (c) 2000 by Pierre Muller
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
}
Const
SystemEventActive : Boolean = false;
procedure InitSystemMsg;
var
res : word;
begin
if SystemEventActive then
exit;
{ enable close }
asm
movl $0x168f,%eax
movl $1,%edx
int $0x2f
movw %ax,Res
end;
SystemEventActive:=(Res=0);
end;
procedure DoneSystemMsg;
begin
if not SystemEventActive then
exit;
{ disable close }
asm
movl $0x168f,%eax
movl $0,%edx
int $0x2f
end;
SystemEventActive:=false;
end;
procedure GetSystemEvent(var SystemEvent: TSystemEvent);
begin
PollSystemEvent(SystemEvent);
end;
function PollSystemEvent(var SystemEvent: TSystemEvent):boolean;
var
CloseState : word;
begin
SystemEvent.typ:=SysNothing;
if not SystemEventActive then
exit(false);
{ Query close }
asm
movl $0x168f,%eax
movl $100,%edx
int $0x2f
movw %ax,CloseState
end;
if (CloseState = 0) then
begin
{ acknowledge Close }
asm
movl $0x168f,%eax
movl $200,%edx
int $0x2f
movw %ax,CloseState
end;
{ non zero means error ! }
if CloseState=0 then
begin
PollSystemEvent:=true;
SystemEvent.typ:=SysClose;
end;
end;
end;
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