Re: towards 4.4

[Tatsuro M. <tma...@ya...>]

Hello


I have found web page in written Japanese.

It was written that SIGINT is not easy to handle in console applications.
However, there shows a way to use SetConsoleCtrlHandler function.

#***************
#include <windows.h>
#include <wincon.h>
#include <iostream>

//handler function
BOOL handler(DWORD ctrlChar){
  if(CTRL_C_EVENT == ctrlChar){
    std::cout<< "Ctrl+C pressed"<< std::endl;
    return FALSE;
  }

int main(void){
  ::SetConsoleCtrlHandler(handler, TRUE);

  while(true)
    ::Sleep(100);

  return 0;
}

#*********
prototype of handler
BOOL WINAPI HandlerRoutine(DWORD dwCtrlType);

#***************

dwCtrlType

CTRL_C_EVENT       Receives Cntl+C 
CTRL_BREAK_EVENT   Receives Cntl+BREAK 
CTRL_CLOSE_EVENT   Console is closed by a user
CTRL_LOGOFF_EVENT  Receives a signal which is sent from the system
                    to all console processes because user tries to log off
CTRL_SHUTDOWN_EVENT Receives a signal which is sent from the system
                    to all console processes because user tries to shut down

#**************

MSDN page in English

http://msdn.microsoft.com/en-us/library/ms686016(VS.85).aspx


Are the above helpful?

Regards

Tatsuro

--- Ethan Merritt <merritt@u.washington.edu> wrote:

> On Thursday 28 January 2010 15:33:48 Tatsuro MATSUOKA wrote:
> > Hello
> > 
> > I have remembered that Benjamin have posted concerning issue of ctrl+c on gnuplot.exe for
> windows.
> > 
> > http://old.nabble.com/MSWin-issues-holding-up-4.4.rc1-td25793940.html#a26015183
> > 
> > ****************
> > --- gnuplot-4.3.0-2009-07-08-orig/src/plot.c	2009-09-20 20:16:47 +0200
> > +++ gnuplot-4.3.0-2009-07-08/src/plot.c	2009-10-18 13:06:08 +0200
> > @@ -684,7 +684,11 @@
> >      setmatherr(purec_matherr);
> >  #endif
> >  
> > +#if defined(WGP_CONSOLE)
> > +    (void) signal(SIGINT, SIG_IGN);
> > +#else
> >      (void) signal(SIGINT, (sigfunc) inter);
> > +#endif
> >  
> >  #ifdef SIGPIPE
> >      /* ignore pipe errors, this might happen with set output "|head" */
> > ******************
> > 
> > The above seems not to be applied yet.
> 
> That would cause the program to ignore ctrl-c.
> It would be better to fix the signal-handling routine so that it
> responds to ctrl-c correctly.
> 
> Does someone know the history of this problem?
> Did ctrl-c work on Windows in older versions of gnuplot?
> If so, when did it break?
> 
> -- 
> Ethan A Merritt
> 


--------------------------------------
Get the new Internet Explorer 8 optimized for Yahoo! JAPAN
http://pr.mail.yahoo.co.jp/ie8/