From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat, 29 Sep 2007 18:17:11 +0200
From: Martin Neubauer <m.ne@gmx.net>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] Page problems
Message-ID: <20070929161711.GD801@shodan.homeunix.net>
References: <20070929152846.GC801@shodan.homeunix.net>
	<53f12eb5933a22903e38de7a0c9f6a19@quanstro.net>
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* erik quanstrom (quanstro@quanstro.net) wrote:
> if this is a timing issue, then that should be addressed.  if your diagnosis is
> correct, then if pagecache would slept until the event loop were running,
> that would fix the timing problem.
>
> maybe something like
>
> int	eventdawn;		/* set after event loop is fired up */
>
> Image*
> cachedpage(Document *doc, int angle, int page)
> {
> 	static int lastpage = -1;
> 	static int rabusy;
> 	Image *im;
> 	int ra;
>
> +	while(eventdawn == 0)
> +		sleep(1);

I'm afraid in this instance this wouldn't help. The control flow is smething
like main -> viewer -> { showpage -> cachedpage ; event loop }. Maybe
the following would better:

void
viewer(Document *dd)
{
	.
	.
	.

	midmenu.item = miditems;
	midmenu.gen = 0;
	midmenu.lasthit = Next;

<	showpage(page, &menu);
---
>	if(doc->npage > 0)
>		showpage(page, &menu);
	esetcursor(nil);

	Martin