rewrite session creation function _new() / register all callbacks at session creation

remove the possibility to change SYNC/ASYNC handling of sync events at runtime.

It has to be defined at Session::initialize() and cannot be changed anymore. This is not needed.

src/Adapter.cc

@@ -20,9 +20,15 @@ namespace pEp {
         // ---------------------------------------------------------------------------------------
         // SESSION
         // ---------------------------------------------------------------------------------------
-        Session::Session() :
-            _sync_mode{ SyncModes::Async }, _messageToSend{ nullptr }, _notifyHandshake{ nullptr },
-            _adapter_manages_sync_thread{ false }, _inject_action{ nullptr }
+        std::mutex mut{};
+        SyncModes Session::_sync_mode{ SyncModes::Async };
+        bool Session::_adapter_manages_sync_thread{ false };
+        ::messageToSend_t Session::_cb_messageToSend{ nullptr };
+        ::notifyHandshake_t Session::_cb_notifyHandshake{ nullptr };
+        ::inject_sync_event_t Session::_cb_handle_sync_event_from_engine{ nullptr };
+        bool Session::_is_initialized{ false };
+
+        Session::Session()
         {
             pEpLog("libpEpAdapter Session-manager created");
         }
@@ -61,37 +67,35 @@ namespace pEp {
             _cb_notifyHandshake = notifyHandshake;
             _sync_mode = sync_mode;
             _adapter_manages_sync_thread = adapter_manages_sync_thread;
-            refresh();
             ::adapter_group_init();
+            _is_initialized = true;
         }
 
         void Session::_new()
         {
             std::lock_guard<mutex> lock(mut);
 
-            // Switch to mode "Sync" ensures the sync thread to be shutdown
             if (_sync_mode == SyncModes::Sync) {
-                // process the event directly
-                _inject_action = _process_sync_event;
-                if (!_adapter_manages_sync_thread) {
-                    stop_sync();
-                } else {
-                    // The adapter needs to shutdown sync thread
-                }
+                _cb_handle_sync_event_from_engine = _cb_pass_sync_event_to_engine;
             }
-            // Switch to mode "ASync", sync thread needs to be started using start_sync
+
             if (_sync_mode == SyncModes::Async) {
-                // put the event on queue
-                _inject_action = _inject_sync_event;
+                _cb_handle_sync_event_from_engine = _cb_enqueue_sync_event;
             }
 
             // create
             ::PEP_SESSION session_{ nullptr };
-            ::PEP_STATUS status = ::init(&session_, _messageToSend, _inject_action, _ensure_passphrase);
+            ::PEP_STATUS status = ::init(&session_, _cb_messageToSend,
+                _cb_handle_sync_event_from_engine, _ensure_passphrase);
+            throw_status(status);
+
+            status = ::register_sync_callbacks(
+                session_,
+                nullptr,
+                _cb_notifyHandshake,
+                _cb_dequeue_next_sync_event);
             throw_status(status);
 
-            // replace "atomically"
-            release();
             _session = SessionPtr{ session_, ::release };
         }
 

src/Adapter.hh

@@ -55,56 +55,50 @@ namespace pEp {
             // bool adapter_manages_sync_thread:
             // * true: libpEpAdapter will not manage the sync thread, the adapter impl will have to implement it.
             // * false: libpEpAdapter will manage the sync thread
-            //
-            // TODO:
-            // CAUTION: This call may result in a partially initialized session,
-            // If there are any problems with register_sync_callbacks()
-            // (e.g. due to no own identities yet)
-            // it will still succeed.
-            // BUT
-            // * Sync will not work
-            // * Group Encryption will not work
-            // TODO: This needs to be resolved in the engine, by creating a
-            //  new func register_callbacks() that is not sync specific,
-            //  and move the sync-checks to "start-sync()".
-            // Current workaround: a warning is printed out in this case
-            void initialize(
+            static void initialize(
                 SyncModes sync_mode = SyncModes::Async,
                 bool adapter_manages_sync_thread = false);
 
             // initialize()
             // Same as the initialize() method above, but you can specify arbitrary callbacks
             // to be registered.
-            void initialize(
+            static void initialize(
                 SyncModes sync_mode,
                 bool adapter_manages_sync_thread,
                 ::messageToSend_t messageToSend,
                 ::notifyHandshake_t notifyHandshake);
 
-            // re-creates the session using same values
-            void refresh();
-
             void release();
 
             // returns the PEP_SESSION handle
             PEP_SESSION operator()();
 
-            SyncModes _sync_mode;
-            ::messageToSend_t _messageToSend;
-            ::notifyHandshake_t _notifyHandshake;
-            bool _adapter_manages_sync_thread;
-            ::inject_sync_event_t _inject_action;
+            bool adapter_manages_sync_thread()
+            {
+                return _adapter_manages_sync_thread;
+            }
 
         private:
             using SessionPtr = std::unique_ptr<_pEpSession, std::function<void(PEP_SESSION)>>;
 
-            void _init(
+            static void _init(
                 ::messageToSend_t messageToSend,
                 ::notifyHandshake_t notifyHandshake,
                 SyncModes sync_mode,
                 bool adapter_manages_sync_thread);
 
+            // creates the session
+            void _new();
+
             SessionPtr _session = nullptr;
+
+            static SyncModes _sync_mode;
+            static bool _adapter_manages_sync_thread;
+            static ::messageToSend_t _cb_messageToSend;
+            static ::notifyHandshake_t _cb_notifyHandshake;
+            static ::inject_sync_event_t _cb_handle_sync_event_from_engine;
+
+            static bool _is_initialized;
         };
 
         extern thread_local Session session;