now we always flush when a success is reported, and the funcction is renamed to flush

include/amqpcpp/channelimpl.h

@@ -574,10 +574,10 @@ public:
     }
 
     /**
-     *  Signal the channel that a synchronous operation was completed.
+     *  Signal the channel that a synchronous operation was completed, and that any
-     *  After this operation, waiting frames can be sent out.
+     *  queued frames can be sent out.
      */
-    void onSynchronized();
+    void flush();
 
     /**
      *  Report to the handler that the channel is opened
@@ -596,8 +596,8 @@ public:
         // inform handler
         if (_readyCallback) _readyCallback();
 
-        // if the monitor is still valid, we exit synchronous mode now
+        // if the monitor is still valid, we flush any waiting operations 
-        if (monitor.valid()) onSynchronized();
+        if (monitor.valid()) flush();
     }
 
     /**
@@ -644,19 +644,10 @@ public:
     {
         // skip if there is no oldest callback
         if (!_oldestCallback) return true;
-        
-        // remember whether or not we were synchronous
-        bool synchronous = _synchronous;
 
-        // is the queue empty at this moment?
+        // flush the queue, which will send the next operation if the current operation was synchronous
-        bool empty = _queue.empty();
+        flush();
         
-        // the last (possibly synchronous) operation was received, so we're no longer in synchronous mode. this
-        // is an optimization that makes sure that the first instruction _after_ a synchronous instruction
-        // that is installed during the success callback we make later does _not_ need to be buffered, but can be
-        // sent directly
-        if (synchronous && empty) _synchronous = false;
-
         // we are going to call callbacks that could destruct the channel
         Monitor monitor(this);
 
@@ -670,10 +661,6 @@ public:
         // leap out if channel no longer exists
         if (!monitor.valid()) return false;
 
-        // if we were synchronous, but there were still messages in the queue, we process the queue now, because the synchronous
-        // operation was finished, and its callback was made, which means we're no longer in synchronous mode
-        if (synchronous && !empty) onSynchronized();
-
         // set the oldest callback
         _oldestCallback = next;
 

src/channelimpl.cpp

@@ -754,7 +754,7 @@ bool ChannelImpl::send(const Frame &frame)
  *  Signal the channel that a synchronous operation was completed. After 
  *  this operation, waiting frames can be sent out.
  */
-void ChannelImpl::onSynchronized()
+void ChannelImpl::flush()
 {
     // we are no longer waiting for synchronous operations
     _synchronous = false;

src/deferredget.cpp

@@ -62,7 +62,7 @@ const std::shared_ptr<Deferred> &DeferredGet::reportSuccess() const
 void DeferredGet::complete()
 {
     // the channel is now synchronized, delayed frames may now be sent
-    _channel->onSynchronized();
+    _channel->flush();
     
     // pass on to normal implementation
     DeferredExtReceiver::complete();