Alive thread implemented

shmqueue.cpp

@@ -23,6 +23,11 @@ ShmQueue::ShmQueue(Shm *shm, ShmSlot slot, bool owner)
     _queue_sem = shm->sem(buf, owner);
 }
 
+void ShmQueue::takeOwnership()
+{
+    _queue_sem->takeOwnership();
+}
+
 ShmQueue::~ShmQueue()
 {
     if (_owner) {
@@ -83,15 +88,14 @@ void ShmQueue::enqueue(int cmd)
     enqueue(cmd, s);
 }
 
-bool ShmQueue::dequeue(int &cmd, std::string &json_data, bool wait)
+
+bool ShmQueue::dequeue(int &cmd, std::string &json_data, int wait_ms)
 {
-    if (wait) {
-        _queue_sem->wait();
-    } else {
-        if (!_queue_sem->trywait()) {
-            return false;
-        }
+    bool something_came = _queue_sem->wait(wait_ms);
+    if (!something_came) {
+        return false;
     }
+
     _shm->lock();
 
     ShmPlace item_place = _queue->first;