traffic-control: Change return type of RedQueueDisc::DropEarly() from uint32_t to bool

src/traffic-control/model/red-queue-disc.cc

@@ -651,7 +651,7 @@ RedQueueDisc::Estimator(uint32_t nQueued, uint32_t m, double qAvg, double qW)
 }
 
 // Check if packet p needs to be dropped due to probability mark
-uint32_t
+bool
 RedQueueDisc::DropEarly(Ptr<QueueDiscItem> item, uint32_t qSize)
 {
     NS_LOG_FUNCTION(this << item << qSize);
@@ -673,7 +673,7 @@ RedQueueDisc::DropEarly(Ptr<QueueDiscItem> item, uint32_t qSize)
         if ((double)qSize < fraction * m_qAvg)
         {
             // Queue could have been empty for 0.05 seconds
-            return 0;
+            return false;
         }
     }
 
@@ -706,10 +706,10 @@ RedQueueDisc::DropEarly(Ptr<QueueDiscItem> item, uint32_t qSize)
         m_countBytes = 0;
         /// \todo Implement set bit to mark
 
-        return 1; // drop
+        return true; // drop
     }
 
-    return 0; // no drop/mark
+    return false; // no drop/mark
 }
 
 // Returns a probability using these function parameters for the DropEarly function

src/traffic-control/model/red-queue-disc.h

@@ -244,9 +244,9 @@ class RedQueueDisc : public QueueDisc
      * \brief Check if a packet needs to be dropped due to probability mark
      * \param item queue item
      * \param qSize queue size
-     * \returns 0 for no drop/mark, 1 for drop
+     * \returns false for no drop/mark, true for drop
      */
-    uint32_t DropEarly(Ptr<QueueDiscItem> item, uint32_t qSize);
+    bool DropEarly(Ptr<QueueDiscItem> item, uint32_t qSize);
     /**
      * \brief Returns a probability using these function parameters for the DropEarly function
      * \returns Prob. of packet drop before "count"