Examples of one.nio.lock.RWLock

one.nio.lock.RWLock

    }


    private static RWLock[] createLocks() {
        RWLock[] locks = new RWLock[CONCURRENCY_LEVEL];
        for (int i = 0; i < CONCURRENCY_LEVEL; i++) {
            locks[i] = new RWLock();
        }
        return locks;
    }

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    public V get(K key) {
        long hashCode = hashCode(key);
        long currentPtr = bucketFor(hashCode);


        RWLock lock = lockFor(hashCode).lockRead();
        try {
            for (long entry; (entry = unsafe.getAddress(currentPtr)) != 0; currentPtr = entry + NEXT_OFFSET) {
                if (unsafe.getLong(entry + HASH_OFFSET) == hashCode && equalsAt(entry, key)) {
                    return isExpired(entry) ? null : valueAt(entry);
                }
            }
        } finally {
            lock.unlockRead();
        }


        return null;
    }

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    public void put(K key, V value) {
        long hashCode = hashCode(key);
        long currentPtr = bucketFor(hashCode);
        int newSize = sizeOf(value);


        RWLock lock = lockFor(hashCode).lockWrite();
        try {
            for (long entry; (entry = unsafe.getAddress(currentPtr)) != 0; currentPtr = entry + NEXT_OFFSET) {
                if (unsafe.getLong(entry + HASH_OFFSET) == hashCode && equalsAt(entry, key)) {
                    int oldSize = sizeOf(entry);
                    if (newSize <= oldSize) {
                        setTimeAt(entry);
                        setValueAt(entry, value);
                        return;
                    }


                    unsafe.putAddress(currentPtr, unsafe.getAddress(entry + NEXT_OFFSET));
                    destroyEntry(entry);
                    count.decrementAndGet();
                    break;
                }
            }


            long entry = allocateEntry(key, hashCode, newSize);
            unsafe.putLong(entry + HASH_OFFSET, hashCode);
            unsafe.putAddress(entry + NEXT_OFFSET, unsafe.getAddress(currentPtr));
            setTimeAt(entry);
            setValueAt(entry, value);


            unsafe.putAddress(currentPtr, entry);
            count.incrementAndGet();
        } finally {
            lock.unlockWrite();
        }
    }

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one.nio.mem.OffheapMap

one.nio.mem.OffheapMap$SamplingCleanup

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