protected int InitAio()
{
// Make a copy to ensure an automatically created delegate doesn't get GC'd while native code
// is still using it:
// https://stackoverflow.com/questions/6193711/call-has-been-made-on-garbage-collected-delegate-in-c
aioCallback = new AioCallback(callback);
var res = nng_aio_alloc(out aioHandle, aioCallback, IntPtr.Zero);
return(res);
}
public static NngResult <INngAio> Create(AioCallback callback)
{
// Make a copy to ensure an automatically created delegate doesn't get GC'd while native code
// is still using it:
// https://stackoverflow.com/questions/6193711/call-has-been-made-on-garbage-collected-delegate-in-c
// https://docs.microsoft.com/en-us/cpp/dotnet/how-to-marshal-callbacks-and-delegates-by-using-cpp-interop
var res = nng_aio_alloc(out var aioHandle, callback, IntPtr.Zero);
return(NngResult <INngAio> .OkThen(res, () => new NngAio { aioHandle = aioHandle, gcHandle = GCHandle.Alloc(callback) }));
}
internal int Init(IMessageFactory <T> factory, ISocket socket, Action <IntPtr> callback)
{
Factory = factory;
Socket = socket;
// Make a copy to ensure an auto-matically created delegate doesn't get GC'd while native code
// is still using it:
// https://stackoverflow.com/questions/6193711/call-has-been-made-on-garbage-collected-delegate-in-c
aioCallback = new AioCallback(callback);
// FIXME: TODO: callbacks still getting GC'd. Maybe I need to move nng_aio_free() out of Dispose()?
callbacks.Add(aioCallback);
return(nng_aio_alloc(out aioHandle, aioCallback, IntPtr.Zero));
}
protected int InitAio()
{
// Make a copy to ensure an auto-matically created delegate doesn't get GC'd while native code
// is still using it:
// https://stackoverflow.com/questions/6193711/call-has-been-made-on-garbage-collected-delegate-in-c
aioCallback = new AioCallback(callback);
var res = nng_aio_alloc(out aioHandle, aioCallback, IntPtr.Zero);
if (res == 0)
{
// FIXME: TODO: callbacks still getting GC'd. Maybe I need to move nng_aio_free() out of Dispose()?
var added = callbacks.TryAdd(aioCallback, true);
System.Diagnostics.Debug.Assert(added);
}
return(res);
}
public void Basic()
{
Util.RepeatTest(() => {
var callbacks = new AioCallback[] {
null,
staticAioCallback,
};
foreach (var callback in callbacks)
{
using (var aio = factory.CreateAio(callback).Unwrap())
{
aio.SetTimeout(10);
aio.Wait();
aio.GetResult().Unwrap();
Assert.Equal(IntPtr.Zero, aio.GetOutput(0));
aio.Cancel();
}
}
});
}
public static extern int nng_aio_alloc(out nng_aio aio, AioCallback callback, IntPtr arg);
public NngResult <INngAio> CreateAio(AioCallback callback) => NngAio.Create(callback);
