Home / cs-notes / Language / Java / Concurrent / Code / Synchronization / ReentrantLock / NonfairSync

/**
    * Sync object for non-fair locks
    */
static final class NonfairSync extends Sync {
    private static final long serialVersionUID = 7316153563782823691L;

    /**
        * Performs lock.  Try immediate barge, backing up to normal
        * acquire on failure.
        */
    final void lock() {
        if (compareAndSetState(0, 1))
            setExclusiveOwnerThread(Thread.currentThread());
        else
            acquire(1);
    }

    protected final boolean tryAcquire(int acquires) {
        return nonfairTryAcquire(acquires);
    }
}