private protected async ValueTask ConsumeAsync()
{
await reader.ReadBlockAsync(metadataBuffer.AsMemory()).ConfigureAwait(false);
metadata = new LogEntryMetadata(metadataBuffer);
consumed = false;
}
// slow path - consume metadata asynchronously and allocate buffer on the heap
private async ValueTask ConsumeSlowAsync()
{
if (metadataBuffer.IsEmpty)
{
metadataBuffer = new(new byte[LogEntryMetadata.Size]);
}
await reader.ReadBlockAsync(metadataBuffer).ConfigureAwait(false);
metadata = new(metadataBuffer);
consumed = false;
}
ValueTask IDataTransferObject.WriteToAsync <TWriter>(TWriter writer, CancellationToken token)
{
ValueTask result;
if (consumed)
{
result = new ValueTask(Task.FromException(new InvalidOperationException(ExceptionMessages.ReadLogEntryTwice)));
}
else
{
consumed = true;
result = reader.ReadBlockAsync(length, writer, token);
}
return(result);
}