org.jctools.queues.atomic.AtomicQueueUtil Maven / Gradle / Ivy
package org.jctools.queues.atomic;
import java.util.concurrent.atomic.AtomicLongArray;
import java.util.concurrent.atomic.AtomicReferenceArray;
final class AtomicQueueUtil
{
static E lvRefElement(AtomicReferenceArray buffer, int offset)
{
return buffer.get(offset);
}
static E lpRefElement(AtomicReferenceArray buffer, int offset)
{
return buffer.get(offset); // no weaker form available
}
static void spRefElement(AtomicReferenceArray buffer, int offset, E value)
{
buffer.lazySet(offset, value); // no weaker form available
}
static void soRefElement(AtomicReferenceArray buffer, int offset, Object value)
{
buffer.lazySet(offset, value);
}
static void svRefElement(AtomicReferenceArray buffer, int offset, E value)
{
buffer.set(offset, value);
}
static int calcRefElementOffset(long index)
{
return (int) index;
}
static int calcCircularRefElementOffset(long index, long mask)
{
return (int) (index & mask);
}
static AtomicReferenceArray allocateRefArray(int capacity)
{
return new AtomicReferenceArray(capacity);
}
static void spLongElement(AtomicLongArray buffer, int offset, long e)
{
buffer.lazySet(offset, e);
}
static void soLongElement(AtomicLongArray buffer, int offset, long e)
{
buffer.lazySet(offset, e);
}
static long lpLongElement(AtomicLongArray buffer, int offset)
{
return buffer.get(offset);
}
static long lvLongElement(AtomicLongArray buffer, int offset)
{
return buffer.get(offset);
}
static int calcLongElementOffset(long index)
{
return (int) index;
}
static int calcCircularLongElementOffset(long index, int mask)
{
return (int) (index & mask);
}
static AtomicLongArray allocateLongArray(int capacity)
{
return new AtomicLongArray(capacity);
}
static int length(AtomicReferenceArray buf)
{
return buf.length();
}
/**
* This method assumes index is actually (index << 1) because lower bit is used for resize hence the >> 1
*/
static int modifiedCalcCircularRefElementOffset(long index, long mask)
{
return (int) (index & mask) >> 1;
}
static int nextArrayOffset(AtomicReferenceArray curr)
{
return length(curr) - 1;
}
}