Added NeedsFastPollCallback

src/org/pEp/jniadapter/AbstractEngine.java

@@ -155,6 +155,15 @@ abstract class AbstractEngine implements AutoCloseable {
         this.notifyHandshakeCallback = notifyHandshakeCallback;
     }
 
+    public int needsFastPollCallFromC(Boolean fast_poll_needed) {
+        if (needsFastPollCallback != null) {
+            needsFastPollCallback.needsFastPoll(fast_poll_needed);
+        } else {
+            throw new RuntimeException("Callback not set");
+        }
+        return 0;
+    }
+
     public int notifyHandshakeCallFromC(_Identity _myself, _Identity _partner, SyncHandshakeSignal _signal) {
         Identity myself = new Identity(_myself);
         Identity partner = new Identity(_partner);

src/org/pEp/jniadapter/Sync.java

@@ -10,6 +10,11 @@ import org.pEp.jniadapter.pEpException;
 
 public interface Sync {
 
+     
+    interface NeedsFastPollCallback {
+        void needsFastPollCallFromC(Boolean fast_poll_needed);
+    }
+
     interface MessageToSendCallback {
         void messageToSend(Message message);
     }

src/org_pEp_jniadapter_AbstractEngine.cc

@@ -199,6 +199,7 @@ extern "C" {
 
     static jobject sync_obj = NULL;
     static JNIEnv* sync_env = NULL;
+    static jmethodID needsFastPollMethodID = NULL; 
     static jmethodID notifyHandShakeMethodID = NULL; 
     static jmethodID messageToSendMethodID = NULL;
     static jclass messageClass = NULL;
@@ -276,11 +277,15 @@ extern "C" {
         time_t now, end;
         void *msg;
 
+        jboolean needs_fast_poll = (timeout != NULL);
+
         if(timeout && *timeout != 0){
             now = time(NULL);
             end = now + *timeout;
         }
 
+        sync_env->CallVoidMethod(sync_obj, needsFastPollMethodID, needs_fast_poll);
+
         while (!queue->size()){
             // TODO: add blocking dequeue 
             usleep(100000);
@@ -312,6 +317,12 @@ extern "C" {
 
         jclass clazz = sync_env->GetObjectClass(sync_obj);
 
+        needsFastPollMethodID = sync_env->GetMethodID(
+            clazz,
+            "needsFastPollCallFromC",
+            "(Z)I");
+        assert(needsFastPollMethodID);
+
         notifyHandShakeMethodID = sync_env->GetMethodID(
             clazz,
             "notifyHandshakeCallFromC",