Compare this with SpinLock.
This is not very optimal, I think this a very simple solution that has no RaceCondition or DeadLock problem:
if ( lock.isLocked() )
{ CLI // Avoid ContextChange for ( int i = 0; i < 200 && lock.isLocked(); i++ ) ; STI } lock.waitForLock(); // Either lock immediately or do a ContextChange until lock is taken doTask(); lock.dropLock();
This won't work on a multi-cpu where context change does not take place through IRQs.