/**
* Wait until the semaphore is full or the timer expires. If the semaphore is already full, return
* immediately. Use {@link Deadline#expire()} to make this return early. Does not change the state
* of the semaphore.
*
* @param timer time to wait. If null, returns immediately.
* @return true if <code>take()</code> was successful (semaphore was or became full), else false
* (timer expired).
* @throws InterruptedException if interrupted while waiting
*/
public synchronized boolean waitFull(Deadline timer) throws InterruptedException {
if (timer != null) {
Deadline.InterruptCallback cb = new Deadline.InterruptCallback();
try {
timer.registerCallback(cb);
while (!state && !timer.expired()) {
this.wait(timer.getSleepTime());
}
} finally {
cb.disable();
timer.unregisterCallback(cb);
}
}
return state;
}
