On Wed, Dec 19, 2001 at 12:50:57AM -0500, D Cleveland wrote:
> int p=0;
> while(!p);
>
> so have the code do nothing until the variable p is equal to 1. Is a
> while loop the best or is there a nicer method?
Dan, it depends upon how long you intend to be looping. If it will be
for short-times only, you can use the atomic_t variables (which do
mostly this, but with 'volatile int p' to force memory access, rather
than allow compiler optimizations to wreck your day :), or spinlocks
(which probably just package that up nicely).
If you might need to be in this loop for a while, use semaphores
instead. One can sleep while holding semaphores.
Take a look into Documentation/*lock*txt (sorry I forget the exact name :)
for more details.
Cheers!
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