public static bool TryRelease(ref CacheAwareElement bucket, T value)
{
if (null == Interlocked.CompareExchange(ref bucket.Value1, value, null))
{
goto Done;
}
if (null == Interlocked.CompareExchange(ref bucket.Value2, value, null))
{
goto Done;
}
if (null == Interlocked.CompareExchange(ref bucket.Value3, value, null))
{
goto Done;
}
if (null == Interlocked.CompareExchange(ref bucket.Value4, value, null))
{
goto Done;
}
return(false);
Done : return(true);
}
public static void Clear <TEvictionStrategy>(ref CacheAwareElement bucket, ref TEvictionStrategy policy)
where TEvictionStrategy : struct, IEvictionStrategy <T>
{
// Note that the initial read is optimistically not synchronized. That is intentional.
// We will interlock only when we have a candidate. in a worst case we may miss some
// recently returned objects. Not a big deal.
T inst = bucket.Value1;
if (inst != null && policy.CanEvict(inst))
{
Interlocked.CompareExchange(ref bucket.Value1, null, inst);
}
inst = bucket.Value2;
if (inst != null && policy.CanEvict(inst))
{
Interlocked.CompareExchange(ref bucket.Value2, null, inst);
}
inst = bucket.Value3;
if (inst != null && policy.CanEvict(inst))
{
Interlocked.CompareExchange(ref bucket.Value3, null, inst);
}
inst = bucket.Value4;
if (inst != null && policy.CanEvict(inst))
{
Interlocked.CompareExchange(ref bucket.Value4, null, inst);
}
}
public static bool TryClaim(ref CacheAwareElement bucket, out T item)
{
// Note that the initial read is optimistically not synchronized. That is intentional.
// We will interlock only when we have a candidate. in a worst case we may miss some
// recently returned objects. Not a big deal.
T inst = bucket.Value1;
if (inst != null && inst == Interlocked.CompareExchange(ref bucket.Value1, null, inst))
{
goto Done;
}
inst = bucket.Value2;
if (inst != null && inst == Interlocked.CompareExchange(ref bucket.Value2, null, inst))
{
goto Done;
}
inst = bucket.Value3;
if (inst != null && inst == Interlocked.CompareExchange(ref bucket.Value3, null, inst))
{
goto Done;
}
inst = bucket.Value4;
if (inst != null && inst == Interlocked.CompareExchange(ref bucket.Value4, null, inst))
{
goto Done;
}
item = null;
return(false);
Done:
item = inst;
return(true);
}
