From: Jay Link (jlink@ilbbs.com)
Date: Wed 26 Dec 2001 - 19:07:01 IST
> I have a question about cpu usage..
> in main loop I use;
> void mainloop(void)
> {
> int key;
> while ( (key = vga_getkey()) != 27)
> {
> }
> }
> but like this, cpu usage raises up to %90
vga_getkey() is non-blocking, so it's going to keep looping until a value
of 27 is received. You might consider inserting a delay -- maybe something
as small as usleep(200000) -- which will slow down your process, but not
so much as to impede input.
I believe(?) that even if input is received during the pause, it will go
into a buffer and vga_getkey() will read from that, so nothing will be
lost. Matan? Sergio?
Finally, I assume you know about the vlocking call vga_getch(), and would
use that if possible.
Best,
-JL
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