Implement async (overlapped) I/O with io_uring

src/async_io.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "kernel32/internal.h"
+#include "kernel32/minwinbase.h"
+
+#include <optional>
+
+namespace async_io {
+
+bool initialize();
+void shutdown();
+bool running();
+
+bool queueRead(Pin<kernel32::FileObject> file, OVERLAPPED *ov, void *buffer, DWORD length,
+			   const std::optional<off64_t> &offset, bool isPipe);
+bool queueWrite(Pin<kernel32::FileObject> file, OVERLAPPED *ov, const void *buffer, DWORD length,
+				const std::optional<off64_t> &offset, bool isPipe);
+
+} // namespace async_io