Re: Loading a file on startup

[Michael Rothwell <rothwell holly-springs nc us>]

Load the file in a second thread, or, try using mmap().

-M

On Wed, May 30, 2001 at 10:13:13AM -0400, Owen Taylor wrote:
> Markus Lausser <sgop users sourceforge net> writes:
>
> > Hello.
> >
> > I want to load a huge file on startup, this lasts up to a few minutes, but
> > my application should not freeze.
> > At the moment i have realized this with a gtk_idle_add(), but i would prefer
> > the gdk_input_add() method. But this freezes my application until the whole
> > file was read.
> >
> > And now i wonder:
> > if i use gtk_input_add() on a socket to download from another machine, my app
> > never freezes (also if there is always data available). SO, why does my app 
> > when reading from a file?
>  
> Some types of file descriptors (like files) are considered
> "fast" and for these file descriptors, the poll() and select() system
> calls [ what gdk_input_add() uses internally ] will always indicate
> that there is something available for reading.
>
> For that reason, you can't meaningfully use gdk_input_add() with a 
> local file. You could conceivably use another process to read in
> the file and send it over a pipe to the main process. 
>
> However, even that way, the data will most likely come in fast
> enough to effectively hang your application.
>
> Regards,
>                                         Owen 
>
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