From: paochen_paul AT hotmail DOT com (Paul Simon)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Weird mouse interrupt...Help!
Date: 28 Nov 2002 04:59:25 -0800
Organization: http://groups.google.com/
Lines: 38
Message-ID: <4d62e692.0211280459.320c9535@posting.google.com>
References: <hqs8uu04qrhp5363t9ref760hhbdstnn3i AT 4ax DOT com> <4d62e692 DOT 0211271946 DOT 799e233b AT posting DOT google DOT com> <3de5adb7 DOT sandmann AT clio DOT rice DOT edu>
NNTP-Posting-Host: 61.222.76.236
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: posting.google.com 1038488365 1135 127.0.0.1 (28 Nov 2002 12:59:25 GMT)
X-Complaints-To: groups-abuse AT google DOT com
NNTP-Posting-Date: 28 Nov 2002 12:59:25 GMT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Charles Sandmann <sandmann AT clio DOT rice DOT edu> wrote in message news:<3de5adb7 DOT sandmann AT clio DOT rice DOT edu>...
> > When I replaced the source code disable() and enable() by 
> > ("sti") and ("cli") in my H/W interrupt handler, then system 
> > never been hung, they work fine both with PS/2 mouse and 
> > COM port mouse. So I think my problem has been solved! but I don't know why?
> 
> Do *NOT* put an enable() call in your handler if you are using the
> DJGPP wrappers.  Do *NOT* put a "sti" either.  The wrappers are
> not re-entrant, and they restore interrupts on exit.
> 
> > hardware_int_handler()
> > {
> >    INTERRUPT_ENTER();
       ^^^^^^^^^^^^^ This is *wrong*, please Do *NOT* to use disable() or "sti"
>  
> >    //your handler code here.
>  
> >    INTERRUPT_LEAVE_BOTH();
       ^^^^^^^^^^^^^^ This is *wrong*, please Do *NOT* to use enable() or "cli"
> > }
> 
> This is wrong; do not use the sti/cli

Thanks for Charles!!

Yes! I used DJGPP wrappers to insatll my handler. as this

    ...
    _go32_dpmi_get_protected_mode_interrupt_vector(intr_vector, &oldirq);
    newirq.pm_offset = (int)hardware_int_handler;  //my H/W handler
    newirq.pm_selector = _go32_my_cs();
    _go32_dpmi_allocate_iret_wrapper(&newirq);  //DJGPP wrapper.
    ...
  
In my handler, I remove INTERRUPT_ENTER() and  INTERRUPT_LEAVE_BOTH() as 
Charles said. And my program work fine(when mouse interrupt or my H/W 
interrut occurred), my system never crashed! I try many times.
Thanks for Charles again!!