private int NextCounterId()
{
if (_freeList.Count == 0)
{
return(++_idHighWaterMark);
}
var counterId = _freeList.Dequeue();
ValuesBuffer.PutLongOrdered(CounterOffset(counterId), 0L);
return(counterId);
}
/// <summary>
/// Iterate over the counters and provide the value and basic metadata.
/// </summary>
/// <param name="consumer"> for each allocated counter. </param>
public void ForEach(CounterConsumer consumer)
{
int counterId = 0;
for (int i = 0, capacity = MetaDataBuffer.Capacity; i < capacity; i += METADATA_LENGTH)
{
int recordStatus = MetaDataBuffer.GetIntVolatile(i);
if (RECORD_ALLOCATED == recordStatus)
{
consumer(ValuesBuffer.GetLongVolatile(CounterOffset(counterId)), counterId, LabelValue(i));
}
else if (RECORD_UNUSED == recordStatus)
{
break;
}
counterId++;
}
}
private int NextCounterId()
{
long nowMs = _epochClock.Time();
for (int i = 0, size = _freeList.Count; i < size; i++)
{
int counterId = _freeList[i];
long deadlineMs = MetaDataBuffer.GetLongVolatile(MetaDataOffset(counterId) + FREE_FOR_REUSE_DEADLINE_OFFSET);
if (nowMs >= deadlineMs)
{
_freeList.Remove(i);
ValuesBuffer.PutLongOrdered(CounterOffset(counterId), 0L);
return(counterId);
}
}
return(++_idHighWaterMark);
}
/// <summary>
/// Set an <seealso cref="AtomicCounter"/> value based on counterId.
/// </summary>
/// <param name="counterId"> to be set. </param>
/// <param name="value"> to set for the counter. </param>
public void SetCounterValue(int counterId, long value)
{
ValuesBuffer.PutLongOrdered(CounterOffset(counterId), value);
}
public override FloatDictionaryArray Build(MemoryAllocator allocator)
{
allocator = allocator ?? MemoryAllocator.Default.Value;
return(new FloatDictionaryArray(IndicesBuffer.Length, ValuesBuffer.Length, IndicesBuffer.Build(allocator), ValuesBuffer.Build(allocator),
ArrowBuffer.Empty));
}
/// <summary>
/// Get the value for a given counter id as a volatile read.
/// </summary>
/// <param name="counterId"> to be read. </param>
/// <returns> the current value of the counter. </returns>
public long GetCounterValue(int counterId)
{
ValidateCounterId(counterId);
return(ValuesBuffer.GetLongVolatile(CounterOffset(counterId)));
}