instead of using a while loop, just block based on whether or not another thread is holding the queue mutex;

src/common/network/RawFrameQueue.cpp

@@ -12,7 +12,6 @@
 #include "network/udp/Socket.h"
 #include "Log.h"
 #include "Utils.h"
-#include "Thread.h"
 
 using namespace network;
 
@@ -119,8 +118,7 @@ void RawFrameQueue::enqueueMessage(const uint8_t* message, uint32_t length, sock
     // if the queue is flushing -- don't attempt to enqueue any messages
     if (m_queueFlushing) {
         LogWarning(LOG_NET, "RawFrameQueue::enqueueMessage() -- queue is flushing, waiting to enqueue message");
-        while (m_queueFlushing)
-            Thread::sleep(1U);
+        std::lock_guard<std::mutex> lock(m_queueMutex);
     }
 
     uint8_t* buffer = new uint8_t[length];