public int await (long timeout, TimeUnit unit) throws InterruptedException, BrokenBarrierException, TimeoutException

Waits until all parties have invoked await on this barrier, or the specified waiting time elapses.

If the current thread is not the last to arrive then it is disabled for thread scheduling purposes and lies dormant until one of the following things happens:

• The last thread arrives; or
• The specified timeout elapses; or
• Some other thread interrupts the current thread; or
• Some other thread interrupts one of the other waiting threads; or
• Some other thread times out while waiting for barrier; or
• Some other thread invokes reset on this barrier.

If the current thread:

• has its interrupted status set on entry to this method; or
• is interrupted while waiting

then InterruptedException is thrown and the current thread's interrupted status is cleared.

If the specified waiting time elapses then TimeoutException is thrown. If the time is less than or equal to zero, the method will not wait at all.

If the barrier is reset while any thread is waiting, or if the barrier is broken when await is invoked, or while any thread is waiting, then BrokenBarrierException is thrown.

If any thread is interrupted while waiting, then all other waiting threads will throw BrokenBarrierException and the barrier is placed in the broken state.

If the current thread is the last thread to arrive, and a non-null barrier action was supplied in the constructor, then the current thread runs the action before allowing the other threads to continue. If an exception occurs during the barrier action then that exception will be propagated in the current thread and the barrier is placed in the broken state.

Parameters:

timeout		the time to wait for the barrier
unit		the time unit of the timeout parameter

Returns:  the arrival index of the current thread, where index getParties() - 1 indicates the first to arrive and zero indicates the last to arrive

Exceptions:

InterruptedException		if the current thread was interrupted while waiting
TimeoutException		if the specified timeout elapses. In this case the barrier will be broken.
BrokenBarrierException		if another thread was interrupted or timed out while the current thread was waiting, or the barrier was reset, or the barrier was broken when await was called, or the barrier action (if present) failed due to an exception