Path: chuka.playstation.co.uk!news
From: "pal" <palpalpalpal@hotmail.com>
Newsgroups: scee.yaroze.freetalk.english
Subject: weird behaviour in vsync callback
Date: 20 Feb 2002 14:53:09 GMT
Organization: PlayStation Net Yaroze (SCEE)
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Message-ID: <01c1ba1d$77e99820$57a1933e@pal-s-omnibook>
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In the following code x never gets set to 2. I can't understand why. Any
idea?
Note: the commented out "puts" is here to check that f actually gets
executed: if you uncomment it, something gets printed (although not the
specified string). I wouldn't expect it to work properly under the
constraints of a vsync callback, it's just a test.
Oddly, I have some more complex code that does exactly the same thing, but
included in my game, and it happens to work properly!

pal

#include <libps.h>
#include <stdio.h>

int x = 0;

void f() {
	x = 2;
	//puts("x");
}

main()	{
	static int i;

	printf("%d\n", x);
	VSyncCallback(f);
	for (i = 0; i < 3*50; i++) VSync(0); // could be just one time but you're
never sure ;)
	printf("%d\n", x);

	x = 1;
	printf("%d\n", x);
}