shutdown sync for single threaded script

src/adapter.cc

@@ -7,7 +7,7 @@
 namespace pEp {
     namespace PythonAdapter {
         Adapter::Adapter(bool unregister_this)
-            : flag_unregister(unregister_this)
+            : flag_unregister(unregister_this), flag_sync_enabled(false)
         {
             session(init);
         }
@@ -55,6 +55,15 @@ namespace pEp {
             return _session;
         }
 
+        ::utility::locked_queue< SYNC_EVENT > * Adapter::q = nullptr;
+
+        void Adapter::shutdown_sync()
+        {
+            if (queue_active())
+                queue().push_front(nullptr);
+            flag_sync_enabled = false;
+        }
+
         PyObject *Adapter::ui_object(PyObject *value)
         {
             lock_guard<mutex> lock(mtx());

src/adapter.hh

@@ -14,6 +14,7 @@ namespace pEp {
 
         class Adapter {
                 bool flag_unregister;
+                bool flag_sync_enabled;
 
             public:
                 Adapter(bool unregister_this = false);
@@ -28,16 +29,21 @@ namespace pEp {
                 PEP_SESSION session(session_action action = none);
                 static ::utility::locked_queue< SYNC_EVENT >& queue()
                 {
-                    static ::utility::locked_queue< SYNC_EVENT > q;
-                    return q;
+                    if (!q)
+                        q = new ::utility::locked_queue< SYNC_EVENT >();
+                    return *q;
                 }
-
-                void shutdown_sync() { queue().push_front(nullptr); }
+                void script_is_implementing_sync() { flag_sync_enabled = true; }
+                void shutdown_sync();
+                bool is_sync_active() { return flag_sync_enabled; }
 
             protected:
                 static PyObject *ui_object(PyObject *value = nullptr);
                 static int _inject_sync_event(SYNC_EVENT ev, void *management);
 
+                static ::utility::locked_queue< SYNC_EVENT > *q;
+                bool queue_active() { return !!q; }
+
             private:
                 static mutex& mtx()
                 {

src/message.cc

@@ -306,7 +306,7 @@ namespace pEp {
         }
 
         boost::python::tuple Message::decrypt(int flags) {
-            return decrypt_message(*this, flags);
+            return pEp::PythonAdapter::decrypt_message(*this, flags);
         }
 
         int Message::outgoing_rating()

src/message_api.cc

@@ -7,6 +7,7 @@
 #include <pEp/message_api.h>
 #include <pEp/sync_api.h>
 #include <pEp/sync_codec.h>
+#include <pEp/distribution_codec.h>
 
 namespace pEp {
     namespace PythonAdapter {
@@ -47,7 +48,7 @@ namespace pEp {
             PEP_decrypt_flags_t _flags = (PEP_decrypt_flags_t) flags;
             message *_src = src;
 
-            PEP_STATUS status = decrypt_message(adapter.session(), _src, &_dst, &_keylist,
+            PEP_STATUS status = ::decrypt_message(adapter.session(), _src, &_dst, &_keylist,
                     &_rating, &_flags);
             _throw_status(status);
 

src/pEpmodule.cc

@@ -122,6 +122,14 @@ namespace pEp {
         void leave_device_group() {
             ::leave_device_group(adapter.session());
         }
+
+        void script_is_implementing_sync() {
+            adapter.script_is_implementing_sync();
+        }
+
+        bool is_sync_active() {
+            return adapter.is_sync_active();
+        }
     }
 }
 
@@ -558,6 +566,19 @@ BOOST_PYTHON_MODULE(pEp)
             "call this for a grouped device, which should leave\n"
        );
     
+    def("script_is_implementing_sync", &pEp::PythonAdapter::script_is_implementing_sync,
+            "script_is_implementing_sync()\n"
+            "\n"
+            "call this in case the Python script is implementing sync to make\n"
+            "is_sync_active() working\n"
+       );
+
+    def("is_sync_active", &pEp::PythonAdapter::is_sync_active,
+            "is_sync_active()\n"
+            "\n"
+            "True if sync is active, False otherwise\n"
+       );
+
     // codecs
 
     call< object >(((object)(import("codecs").attr("register"))).ptr(), make_function(sync_search));