internal async Task PingAsync(int ackId, DataLinkShareData data, CancellationToken cancellationToken)
{
bool isHealthy;
try
{
await SendRawWithAckAsync(ackId, data, cancellationToken);
isHealthy = true;
}
catch (OperationCanceledException)
{
isHealthy = false;
}
if (IsHealthy != isHealthy)
{
IsHealthy = isHealthy;
_handler.OnHealthyChanged(_dlc, this);
}
}
internal async Task <bool> SendRawWithAckAsync(int?ackId, DataLinkShareData data, CancellationToken cancellationToken)
{
if (ackId == null)
{
await Write(data);
return(true);
}
var tcs = new TaskCompletionSource <bool>();
cancellationToken.Register(s => ((TaskCompletionSource <bool>)s).TrySetCanceled(), tcs);
_acks.TryAdd(ackId.Value, tcs);
await Write(data);
try
{
return(await tcs.Task);
}
finally
{
_acks.TryRemove(ackId.Value, out _);
}
}
private async ValueTask Write(DataLinkShareData data)
{
if (!_writeLock.Wait(0))
{
Interlocked.Increment(ref _waitingForWriteLock);
await _writeLock.WaitAsync();
Interlocked.Decrement(ref _waitingForWriteLock);
}
try
{
await _outPipe.Writer.WriteAsync(data.Head.Memory);
if (!data.Body.IsEmpty)
{
await _outPipe.Writer.WriteAsync(data.Body);
}
}
finally
{
data.Done();
_writeLock.Release();
}
}
internal ValueTask SendRaw(DataLinkShareData data)
{
return(Write(data));
}
