51 lines
1.6 KiB
C#
51 lines
1.6 KiB
C#
using System.Diagnostics;
|
|
using DotNext.Threading;
|
|
|
|
namespace TanksServer.Interactivity;
|
|
|
|
internal abstract class DroppablePackageRequestConnection<TPackage>(
|
|
ILogger logger,
|
|
ByteChannelWebSocket socket
|
|
) : WebsocketServerConnection(logger, socket), IDisposable
|
|
where TPackage : class, IDisposable
|
|
{
|
|
private readonly AsyncAutoResetEvent _nextPackageEvent = new(false, 1);
|
|
private int _runningMessageHandlers = 0;
|
|
private TPackage? _next;
|
|
|
|
protected override ValueTask HandleMessageAsync(Memory<byte> _)
|
|
{
|
|
if (Interlocked.Increment(ref _runningMessageHandlers) == 1)
|
|
return Core();
|
|
|
|
// client has requested multiple frames, ignoring duplicate requests
|
|
Interlocked.Decrement(ref _runningMessageHandlers);
|
|
return ValueTask.CompletedTask;
|
|
|
|
async ValueTask Core()
|
|
{
|
|
await _nextPackageEvent.WaitAsync();
|
|
var package = Interlocked.Exchange(ref _next, null);
|
|
if (package == null)
|
|
throw new UnreachableException("package should be set here");
|
|
await SendPackageAsync(package);
|
|
Interlocked.Decrement(ref _runningMessageHandlers);
|
|
}
|
|
}
|
|
|
|
protected void SetNextPackage(TPackage next)
|
|
{
|
|
var oldNext = Interlocked.Exchange(ref _next, next);
|
|
_nextPackageEvent.Set();
|
|
oldNext?.Dispose();
|
|
}
|
|
|
|
protected abstract ValueTask SendPackageAsync(TPackage package);
|
|
|
|
public override void Dispose()
|
|
{
|
|
_nextPackageEvent.Dispose();
|
|
Interlocked.Exchange(ref _next, null)?.Dispose();
|
|
}
|
|
}
|