Libspinscale: Initial top-level SMO port to coroutine framework

We haven't ported everything. Just the top-level methods. We'll
dig in to the leaf stuff later. Surprisingly, this all went without
any real difficulties.

Runs like a charm on first try.

smocore/include/marionette/marionetteThread.h

@@ -0,0 +1,37 @@
+#ifndef SMO_MARIONETTE_THREAD_H
+#define SMO_MARIONETTE_THREAD_H
+
+#include <boost/asio/io_service.hpp>
+#include <spinscale/co/invokers.h>
+#include <spinscale/co/postingPromise.h>
+
+namespace smo {
+namespace mrntt {
+
+struct MrnttThreadTag
+{
+	static boost::asio::io_service &io_service() noexcept;
+};
+
+template <typename T>
+using MrnttPostingPromise =
+	sscl::co::TaggedPostingPromise<T, MrnttThreadTag>;
+
+using MrnttNonViralPostingInvoker =
+	sscl::co::NonViralPostingInvoker<MrnttPostingPromise>;
+
+template <typename T>
+using MrnttViralPostingInvoker =
+	sscl::co::ViralPostingInvoker<MrnttPostingPromise, T>;
+
+using MrnttViralNonPostingInvoker =
+	sscl::co::ViralNonPostingInvoker<void>;
+
+template <typename T>
+using MrnttViralNonPostingInvokerT =
+	sscl::co::ViralNonPostingInvoker<T>;
+
+} // namespace mrntt
+} // namespace smo
+
+#endif // SMO_MARIONETTE_THREAD_H