Add manager skeleton

Add stubbed Notify implementation and register for generated
signal callbacks.

Add a unit test; which, at this point does little more than
verify we don't coredump on startup.

Change-Id: I0cda71935947c0d082612a5c52e2b7eba98516ab
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

1 files changed, 168 insertions, 0 deletions

diff --git a/manager.hpp b/manager.hpp
new file mode 100644
index 0000000..9b8338b
--- /dev/null
+++ b/manager.hpp
@@ -0,0 +1,168 @@
+#pragma once
+
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+#include <sdbusplus/server.hpp>
+#include <xyz/openbmc_project/Inventory/Manager/server.hpp>
+
+namespace phosphor
+{
+namespace inventory
+{
+namespace manager
+{
+namespace details
+{
+namespace interface
+{
+namespace holder
+{
+
+/** @struct Base
+ *  @brief sdbusplus server interface holder base.
+ *
+ *  Provides a common type for assembling containers of sdbusplus server
+ *  interfaces.  Typically a multiple inheritance scheme (sdbusplus::object)
+ *  would be used for this; however, for objects created by PIM the interfaces
+ *  are not known at build time.
+ */
+struct Base
+{
+    Base() = default;
+    virtual ~Base() = default;
+    Base(const Base&) = delete;
+    Base& operator=(const Base&) = delete;
+    Base(Base&&) = default;
+    Base& operator=(Base&&) = default;
+};
+
+/** @struct Holder
+ *  @brief sdbusplus server interface holder.
+ *
+ *  Holds a pointer to an sdbusplus server interface instance.
+ *
+ *  @tparam T - The sdbusplus server interface type to hold.
+ */
+template <typename T>
+struct Holder final : public Base
+{
+    Holder() = delete;
+    ~Holder() = default;
+    Holder(const Holder&) = delete;
+    Holder& operator=(const Holder&) = delete;
+    Holder(Holder&&) = default;
+    Holder& operator=(Holder&&) = default;
+    explicit Holder(auto &&ptr) noexcept : _ptr(std::move(ptr)) {}
+
+    /** @brief sdbusplus server interface holder factory method.
+     *
+     *  @param bus[in] - An sdbusplus bus connection
+     *  @param bus[in] - The path of the object for which
+     *          an interface is to be held.
+     *  @returns A held interface.
+     */
+    static auto make(sdbusplus::bus::bus &bus, const char *path)
+    {
+        return static_cast<std::unique_ptr<Base>>(
+                std::make_unique<Holder<T>>(
+                    std::make_unique<T>(bus, path)));
+    }
+
+    private:
+    std::unique_ptr<T> _ptr;
+};
+
+} // namespace holder
+} // namespace interface
+} // namespace details
+
+/** @class Manager
+ *  @brief OpenBMC inventory manager implementation.
+ *
+ *  A concrete implementation for the xyz.openbmc_project.Inventory.Manager
+ *  DBus API.
+ */
+class Manager final :
+    public sdbusplus::server::xyz::openbmc_project::Inventory::Manager
+{
+    public:
+    Manager() = delete;
+    Manager(const Manager&) = delete;
+    Manager& operator=(const Manager&) = delete;
+    Manager(Manager&&) = default;
+    Manager& operator=(Manager&&) = default;
+    ~Manager() = default;
+
+    /** @brief Construct an inventory manager.
+     *
+     *  @param[in] bus - An sdbusplus bus connection.
+     *  @param[in] busname - The DBus busname to own.
+     *  @param[in] root - The DBus path on which to implement
+     *      an inventory manager.
+     *  @param[in] iface - The DBus inventory interface to implement.
+     */
+    Manager(sdbusplus::bus::bus &&, const char *, const char*, const char*);
+
+    using Object = std::map<
+        std::string, std::map<
+            std::string, sdbusplus::message::variant<std::string>>>;
+
+    /** @brief Start processing DBus messages. */
+    void run() noexcept;
+
+    /** @brief Provided for testing only. */
+    void shutdown() noexcept;
+
+    /** @brief sd_bus Notify method implementation callback. */
+    void notify(std::string path, Object) override;
+
+    /** @brief sd_bus signal callback. */
+    void signal(sdbusplus::message::message &, auto &);
+
+    using Event = std::tuple<const char *>;
+    using SigArgs = std::vector<
+        std::unique_ptr<
+            std::tuple<
+                Manager *,
+                const Event *>>>;
+    using SigArg = SigArgs::value_type::element_type;
+
+    private:
+    using Holder = details::interface::holder::Base;
+    using HolderPtr = std::unique_ptr<Holder>;
+    using InterfaceComposite = std::map<std::string, HolderPtr>;
+    using ObjectReferences = std::map<std::string, InterfaceComposite>;
+    using Events = std::map<const char *, Event>;
+
+    /** @brief Provided for testing only. */
+    bool _shutdown;
+
+    /** @brief Path prefix applied to any relative paths. */
+    const char * _root;
+
+    /** @brief A container of sdbusplus server interface references. */
+    ObjectReferences _refs;
+
+    /** @brief A container contexts for signal callbacks. */
+    SigArgs _sigargs;
+
+    /** @brief A container of sdbusplus signal matches.  */
+    std::vector<sdbusplus::server::match::match> _matches;
+
+    /** @brief Persistent sdbusplus DBus bus connection. */
+    sdbusplus::bus::bus _bus;
+
+    /** @brief sdbusplus org.freedesktop.DBus.ObjectManager reference. */
+    sdbusplus::server::manager::manager _manager;
+
+    /** @brief A container of pimgen generated events and responses.  */
+    static const Events _events;
+};
+
+} // namespace manager
+} // namespace inventory
+} // namespace phosphor
+
+// vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4