private async Task SendHelperAsync(Guid destination, MessageDto message, bool reliable)
{
var packetDto = PacketDto.Create(identity.Id, destination, message, reliable);
var ms = outboundPacketMemoryStreamPool.TakeObject();
ms.SetLength(0);
try {
await AsyncSerialize.ToAsync(ms, packetDto).ConfigureAwait(false);
} catch (NotSupportedException) {
// surpassed memory stream buffer size.
if (!reliable)
{
throw new InvalidOperationException("Attempted to send nonreliable buffer surpassing transport buffer size");
}
ms.SetLength(0);
outboundPacketMemoryStreamPool.ReturnObject(ms);
await SendReliableMultipartPacketAsync(destination, packetDto).ConfigureAwait(false);
#if DEBUG
Interlocked.Increment(ref DebugRuntimeStats.out_rs_done);
#endif
return;
}
if (reliable)
{
var completionSignal = new AsyncLatch();
var acknowlewdgementSignal = acknowledgementCoordinator.Expect(packetDto.Id);
unhandledSendRequestQueue.Enqueue(
new SendRequest {
DataBufferPool = outboundPacketMemoryStreamPool,
Data = ms,
DataOffset = 0,
DataLength = (int)ms.Position,
IsReliable = true,
AcknowledgementSignal = acknowlewdgementSignal,
AcknowledgementGuid = packetDto.Id,
CompletionSignal = completionSignal
});
workSignal.Set();
await completionSignal.WaitAsync().ConfigureAwait(false);
}
else
{
unhandledSendRequestQueue.Enqueue(
new SendRequest {
DataBufferPool = outboundPacketMemoryStreamPool,
Data = ms,
DataOffset = 0,
DataLength = (int)ms.Position,
IsReliable = false
});
workSignal.Set();
}
}
public async Task SendAcknowledgementAsync(Guid destination, AcknowledgementDto acknowledgement)
{
var ms = outboundAcknowledgementMemoryStreamPool.TakeObject();
ms.SetLength(0);
await AsyncSerialize.ToAsync(ms, acknowledgement).ConfigureAwait(false);
unhandledSendRequestQueue.Enqueue(
new SendRequest {
Data = ms,
DataOffset = 0,
DataLength = (int)ms.Position,
DataBufferPool = outboundAcknowledgementMemoryStreamPool,
IsReliable = false
});
workSignal.Set();
}
private async Task SendReliableMultipartPacketAsync(Guid destination, PacketDto packet)
{
using (var ms = new MemoryStream()) {
await AsyncSerialize.ToAsync(ms, packet).ConfigureAwait(false);
var payloadSize = ms.Position;
// message id necessary for reassembly of chunks
var multiPartMessageId = Guid.NewGuid();
var chunkCount = (int)((payloadSize - 1) / UdpConstants.kMultiPartChunkSize + 1);
var chunks = Util.Generate(
chunkCount,
chunkIndex => {
var startIndexInclusive = UdpConstants.kMultiPartChunkSize * chunkIndex;
var endIndexExclusive = Math.Min(payloadSize, startIndexInclusive + UdpConstants.kMultiPartChunkSize);
return(new MultiPartChunkDto {
Body = ms.GetBuffer(),
BodyLength = (int)(endIndexExclusive - startIndexInclusive),
BodyOffset = startIndexInclusive,
MultiPartMessageId = multiPartMessageId,
ChunkCount = chunkCount,
ChunkIndex = chunkIndex
});
});
logger.Info($"Splitting large payload into {chunks.Length} chunks.");
await Task.WhenAll(
Util.Generate(
chunkCount,
i => SendReliableAsync(destination, MessageDto.Create(identity.Id, destination, chunks[i]))
)).ConfigureAwait(false);
// const int kConcurrencyLimit = 32;
//// var sync = new AsyncSemaphore(kConcurrencyLimit);
// for (var i = 0; i < chunkCount; i++) {
//// await sync.WaitAsync().ConfigureAwait(false);
// var chunkMessage = MessageDto.Create(identity.Id, destination, chunks[i]);
//// Go(async () => {
// SendReliableAsync(destination, chunkMessage).Forget();
//.ConfigureAwait(false);
// sync.Release();
// }).Forget();
}
}
public async Task BroadcastAsync <T>(T payload)
{
#if DEBUG
Interlocked.Increment(ref DebugRuntimeStats.out_ps);
#endif
var ms = outboundMemoryStreamPool.TakeObject();
Trace.Assert(ms.Position == 0);
await AsyncSerialize.ToAsync(ms, payload).ConfigureAwait(false);
udpClient.Broadcast(
ms, 0, (int)ms.Position,
() => {
ms.SetLength(0);
outboundMemoryStreamPool.ReturnObject(ms);
#if DEBUG
Interlocked.Increment(ref DebugRuntimeStats.out_ps_done);
#endif
});
}
public async Task SendBroadcastAsync(MessageDto message)
{
var packet = PacketDto.Create(
identity.Id,
Guid.Empty,
message,
false);
var ms = broadcastOutboundMemoryStreamPool.TakeObject();
ms.SetLength(0);
try {
await AsyncSerialize.ToAsync(ms, packet).ConfigureAwait(false);
} catch (NotSupportedException) {
throw new InvalidOperationException("Broadcast message would surpass Courier Maximum UDP Transport Size");
}
udpClient.Broadcast(
ms, 0, (int)ms.Position,
() => {
ms.SetLength(0);
broadcastOutboundMemoryStreamPool.ReturnObject(ms);
});
}