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-rw-r--r--src/librbd/AsioEngine.h80
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diff --git a/src/librbd/AsioEngine.h b/src/librbd/AsioEngine.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_ASIO_ENGINE_H
+#define CEPH_LIBRBD_ASIO_ENGINE_H
+
+#include "include/common_fwd.h"
+#include "include/rados/librados_fwd.hpp"
+#include <memory>
+#include <boost/asio/dispatch.hpp>
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/io_context_strand.hpp>
+#include <boost/asio/post.hpp>
+
+struct Context;
+namespace neorados { struct RADOS; }
+
+namespace librbd {
+
+namespace asio { struct ContextWQ; }
+
+class AsioEngine {
+public:
+ explicit AsioEngine(std::shared_ptr<librados::Rados> rados);
+ explicit AsioEngine(librados::IoCtx& io_ctx);
+ ~AsioEngine();
+
+ AsioEngine(AsioEngine&&) = delete;
+ AsioEngine(const AsioEngine&) = delete;
+ AsioEngine& operator=(const AsioEngine&) = delete;
+
+ inline neorados::RADOS& get_rados_api() {
+ return *m_rados_api;
+ }
+
+ inline boost::asio::io_context& get_io_context() {
+ return m_io_context;
+ }
+ inline operator boost::asio::io_context&() {
+ return m_io_context;
+ }
+
+ using executor_type = boost::asio::io_context::executor_type;
+ inline executor_type get_executor() {
+ return m_io_context.get_executor();
+ }
+
+ inline boost::asio::io_context::strand& get_api_strand() {
+ // API client callbacks should never fire concurrently
+ return *m_api_strand;
+ }
+
+ inline asio::ContextWQ* get_work_queue() {
+ return m_context_wq.get();
+ }
+
+ template <typename T>
+ void dispatch(T&& t) {
+ boost::asio::dispatch(m_io_context, std::forward<T>(t));
+ }
+ void dispatch(Context* ctx, int r);
+
+ template <typename T>
+ void post(T&& t) {
+ boost::asio::post(m_io_context, std::forward<T>(t));
+ }
+ void post(Context* ctx, int r);
+
+private:
+ std::shared_ptr<neorados::RADOS> m_rados_api;
+ CephContext* m_cct;
+
+ boost::asio::io_context& m_io_context;
+ std::unique_ptr<boost::asio::io_context::strand> m_api_strand;
+ std::unique_ptr<asio::ContextWQ> m_context_wq;
+};
+
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_ASIO_ENGINE_H