private TFrameList DeserializeSynchronous(ref MessagePackReader reader, MessagePackSerializerOptions options)
{
int count = reader.ReadArrayHeader();
ListFrameWrapper valueWrapper = GetTFrameListWrapper(count);
if (count > 0)
{
FrameFormatterSerializationOptions frameOptions = options.GetOptionParams();
Frame <T>[] resItems = valueWrapper.AsFrameArray();
var formatter = options.Resolver.GetFormatterWithVerify <T>();
for (int i = 0; i < count; i++)
{
resItems[i] = FrameItemFormatter <T> .Deserialize(ref reader, options, frameOptions, formatter);
}
}
return(valueWrapper.AsFrameList());
}
public TFrameList Deserialize(ref MessagePackReader reader, MessagePackSerializerOptions options)
{
if (reader.TryReadNil())
{
return((TFrameList)(IList <T>)null);
}
Interlocked.Increment(ref ParallelGatekeeperSingleton.wrapperDepth);
try
{
options.Security.DepthStep(ref reader);
try
{
FrameFormatterSerializationOptions frameOptions = options.GetOptionParams();
if (frameOptions.MthWorkerConfig.MaxConcurrentTasks == 1 || ParallelGatekeeperSingleton.wrapperDepth > 1)
{
return(DeserializeSynchronous(ref reader, options));
}
var readerBackup = reader.CreatePeekReader();
int count = reader.ReadArrayHeader();
if (count == 0)
{
reader = readerBackup;
return(DeserializeSynchronous(ref reader, options));
}
var peekreader = reader.CreatePeekReader();
if (FrameItemFormatter <T> .ReadElementHeader(ref peekreader) == Frame <T> .unassigned)
{
if (frameOptions.ThrowOnUnnasignedFrameDeserialization)
{
throw new StreamSerializationException($"Unassigned buffer length found during parallel deserialize for {nameof(TFrameList)}");
}
reader = readerBackup;
return(DeserializeSynchronous(ref reader, options));
}
IMessagePackFormatter <T> formatterT = options.Resolver.GetFormatterWithVerify <T>();
ListFrameWrapper valueWrapper = GetTFrameListWrapper(count);
Frame <T>[] resItems = valueWrapper.AsFrameArray();
BatchSizeEstimator batchEstimator = new BatchSizeEstimator(frameOptions.BatchSizeEstimatorConfig);
void ProcessBatch(BatchWithBufferWritersAndElementOffset batch, CancellationToken token)
{
try
{
ReadOnlySpan <int> lengths = batch.buffers.lengths.WrittenSpan;
ReadOnlyMemory <byte> bodies = batch.buffers.concatenatedBodies.WrittenMemory;
int batchSize = batch.buffers.lengths.WrittenCount;
var destSpan = resItems.AsSpan(batch.offset, batchSize);
for (int ix = 0, bodyStartIx = 0; ix < batchSize; ix++)
{
int itemLen = lengths[ix];
ReadOnlyMemory <byte> body = bodies.Slice(bodyStartIx, itemLen);
MessagePackReader tmpReader = new MessagePackReader(body)
{
CancellationToken = token
};
destSpan[ix].BufferLength = body.Length;
destSpan[ix].Item = formatterT.Deserialize(ref tmpReader, options);
bodyStartIx += itemLen;
}
}
finally
{
objPoolBufferWriterBodies.Return(batch.buffers.concatenatedBodies);
objPoolBufferWriterBodyLengths.Return(batch.buffers.lengths);
}
}
using (var mtw = new MultiThreadedWorker <BatchWithBufferWritersAndElementOffset>(
frameOptions.MthWorkerConfig, ProcessBatch))
{
int i = 0;
while (i < count)
{
int batchSize = Math.Min(count - i, batchEstimator.RecomendedBatchSize);
var currentBatch = new BatchWithBufferWritersAndElementOffset()
{
offset = i,
buffers = new BatchWithBufferWriters()
{
concatenatedBodies = objPoolBufferWriterBodies.Get(),
lengths = objPoolBufferWriterBodyLengths.Get()
}
};
for (int seqIx = 0; seqIx < batchSize; seqIx++)
{
int itemLength = FrameItemFormatter <T> .ReadElementHeader(ref reader);
if (itemLength == Frame <T> .unassigned)
{
throw new StreamSerializationException($"Unassigned buffer length found during parallel deserialize for {nameof(TFrameList)}");
}
currentBatch.buffers.lengths.GetSpan(1)[0] = itemLength;
currentBatch.buffers.lengths.Advance(1);
ReadOnlySequence <byte> raw = reader.ReadRaw(itemLength);
raw.CopyTo(currentBatch.buffers.concatenatedBodies.GetSpan(itemLength));
currentBatch.buffers.concatenatedBodies.Advance(itemLength);
batchEstimator.UpdateEstimate(itemLength);
}
mtw.AddWorkItem(currentBatch, reader.CancellationToken);
i += batchSize;
}
}
return(valueWrapper.AsFrameList());
}
finally
{
reader.Depth--;
}
}
finally
{
Interlocked.Decrement(ref ParallelGatekeeperSingleton.wrapperDepth);
}
}