Examples with GridUnsafeMemory org.apache.ignite.internal.util.offheap.unsafe.GridUnsafeMemory used on opensource projects

Example 11 with GridUnsafeMemory

use of org.apache.ignite.internal.util.offheap.unsafe.GridUnsafeMemory in project ignite by apache.

the class GridH2KeyValueRowOffheap method getOffheapValue.

/** {@inheritDoc} */
@SuppressWarnings("LockAcquiredButNotSafelyReleased")
@Override
protected Value getOffheapValue(int col) {
    GridUnsafeMemory mem = desc.memory();
    long p = ptr;
    assert p > 0 : p;
    byte[] bytes = null;
    if (col == KEY_COL) {
        int size = mem.readInt(p + OFFSET_KEY_SIZE);
        assert size > 0 : size;
        bytes = mem.readBytes(p + OFFSET_KEY, size);
    } else if (col == VAL_COL) {
        Lock l = lock(p);
        desc.guard().begin();
        try {
            long valPtr = mem.readLongVolatile(p + OFFSET_VALUE_REF);
            if (// Value was evicted.
            valPtr == 0)
                return null;
            int size = mem.readInt(valPtr);
            assert size > 0 : size;
            bytes = mem.readBytes(valPtr + OFFSET_VALUE, size);
        } finally {
            desc.guard().end();
            l.unlock();
        }
    } else
        throw new IllegalStateException("Column: " + col);
    Data data = Data.create(null, bytes);
    return data.readValue();
}