Add IOScheduler and IOUring

Author: skoppe

examples/iouring/source/app.d

@@ -0,0 +1,44 @@
+import std.stdio : writeln;
+import concurrency;
+import concurrency.socket;
+import concurrency.io;
+import concurrency.operations.whenall;
+
+void main() @safe
+{
+	auto fd = listen("127.0.0.1", 0);
+	auto io = IOUringContext.construct(256);
+	auto socket = getSocket();
+	auto port = fd.getPort();
+
+	writeln("Listening on 127.0.0.1:", port);
+
+	writeln("Connecting...");
+	auto client = io.run(
+		whenAll(
+			io.accept(fd),
+			io.connect(socket, "127.0.0.1", port),
+		)
+	).syncWait().value[0];
+
+
+	ubyte[4] bufferRead;
+	ubyte[4] bufferSend;
+	bufferSend[0..4] = [1,2,3,4];
+
+	writeln("Transmitting...");
+	auto result = io.run(
+		whenAll(
+			io.write(socket, bufferSend[]),
+			io.read(client.fd, bufferRead[]),
+		)
+	).syncWait().value[1];
+
+
+	writeln("Closing...");
+	closeSocket(client.fd);
+	closeSocket(socket);
+	closeSocket(fd);
+
+	writeln("Got: ", result);
+}