use memory poll for streaming

Streaming.cpp

@@ -40,15 +40,15 @@ namespace stream
 		{
 			auto packet = m_ReceiveQueue.front ();
 			m_ReceiveQueue.pop ();
-			delete packet;
+			m_LocalDestination.DeletePacket (packet);
 		}
 		
 		for (auto it: m_SentPackets)
-			delete it;
+			m_LocalDestination.DeletePacket (it);
 		m_SentPackets.clear ();
 		
 		for (auto it: m_SavedPackets)
-			delete it;
+			m_LocalDestination.DeletePacket (it);
 		m_SavedPackets.clear ();
 			
 		LogPrint (eLogDebug, "Streaming: Stream deleted");
@@ -83,7 +83,7 @@ namespace stream
 		{
 			// plain ack
 			LogPrint (eLogDebug, "Streaming: Plain ACK received");
-			delete packet;
+			m_LocalDestination.DeletePacket (packet);
 			return;
 		}
 
@@ -131,7 +131,7 @@ namespace stream
 				// we have received duplicate
 				LogPrint (eLogWarning, "Streaming: Duplicate message ", receivedSeqn, " on sSID=", m_SendStreamID);
 				SendQuickAck (); // resend ack for previous message again
-				delete packet; // packet dropped
+				m_LocalDestination.DeletePacket (packet); // packet dropped
 			}	
 			else
 			{
@@ -163,7 +163,7 @@ namespace stream
 	void Stream::SavePacket (Packet * packet)
 	{
 		if (!m_SavedPackets.insert (packet).second)
-			delete packet;
+			m_LocalDestination.DeletePacket (packet);
 	}	
 
 	void Stream::ProcessPacket (Packet * packet)
@@ -216,7 +216,7 @@ namespace stream
 			m_ReceiveTimer.cancel ();
 		}	
 		else
-			delete packet;
+			m_LocalDestination.DeletePacket (packet);
 		
 		m_LastReceivedSequenceNumber = receivedSeqn;
 
@@ -278,7 +278,7 @@ namespace stream
 				m_RTO = m_RTT*1.5; // TODO: implement it better
 				LogPrint (eLogDebug, "Streaming: Packet ", seqn, " acknowledged rtt=", rtt, " sentTime=", sentPacket->sendTime);
 				m_SentPackets.erase (it++);
-				delete sentPacket;	
+				m_LocalDestination.DeletePacket (sentPacket);	
 				acknowledged = true;
 				if (m_WindowSize < WINDOW_SIZE)
 					m_WindowSize++; // slow start
@@ -345,7 +345,7 @@ namespace stream
 			std::unique_lock<std::mutex> l(m_SendBufferMutex);
 			while ((m_Status == eStreamStatusNew) || (IsEstablished () && !m_SendBuffer.eof () && numMsgs > 0))
 			{
-				Packet * p = new Packet ();
+				Packet * p = m_LocalDestination.NewPacket ();
 				uint8_t * packet = p->GetBuffer ();
 				// TODO: implement setters
 				size_t size = 0;
@@ -532,7 +532,7 @@ namespace stream
 
 	void Stream::SendClose ()
 	{
-		Packet * p = new Packet ();
+		Packet * p = m_LocalDestination.NewPacket ();
 		uint8_t * packet = p->GetBuffer ();
 		size_t size = 0;
 		htobe32buf (packet + size, m_SendStreamID);
@@ -574,7 +574,7 @@ namespace stream
 			if (!packet->GetLength ())
 			{
 				m_ReceiveQueue.pop ();
-				delete packet;
+				m_LocalDestination.DeletePacket (packet);
 			}	
 		}	
 		return pos; 
@@ -852,7 +852,7 @@ namespace stream
 	{
 		for (auto& it: m_SavedPackets)
 		{
-			for (auto it1: it.second) delete it1;
+			for (auto it1: it.second) DeletePacket (it1);
 			it.second.clear ();	
 		}
 		m_SavedPackets.clear ();
@@ -889,7 +889,7 @@ namespace stream
 			else
 			{	
 				LogPrint (eLogError, "Streaming: Unknown stream sSID=", sendStreamID);
-				delete packet;
+				DeletePacket (packet);
 			}
 		}	
 		else 
@@ -901,7 +901,7 @@ namespace stream
 				{
 					// already pending
 					LogPrint(eLogWarning, "Streaming: Incoming streaming with rSID=", receiveStreamID, " already exists");
-					delete packet; // drop it, because previous should be connected
+					DeletePacket (packet); // drop it, because previous should be connected
 					return;
 				}	
 				auto incomingStream = CreateNewIncomingStream ();
@@ -980,7 +980,7 @@ namespace stream
 							auto it = s->m_SavedPackets.find (receiveStreamID);
 							if (it != s->m_SavedPackets.end ())
 							{
-								for (auto it1: it->second) delete it1;
+								for (auto it1: it->second) s->DeletePacket (it1);
 								it->second.clear ();
 								s->m_SavedPackets.erase (it);
 							}
@@ -1074,13 +1074,13 @@ namespace stream
 	void StreamingDestination::HandleDataMessagePayload (const uint8_t * buf, size_t len)
 	{
 		// unzip it
-		Packet * uncompressed = new Packet;
+		Packet * uncompressed = NewPacket ();
 		uncompressed->offset = 0;
 		uncompressed->len = m_Inflator.Inflate (buf, len, uncompressed->buf, MAX_PACKET_SIZE);
 		if (uncompressed->len)
 			HandleNextPacket (uncompressed); 
 		else
-			delete uncompressed;
+			DeletePacket (uncompressed);
 	}
 
 	std::shared_ptr<I2NPMessage> StreamingDestination::CreateDataMessage (const uint8_t * payload, size_t len, uint16_t toPort)

Streaming.h

@@ -18,6 +18,7 @@
 #include "I2NPProtocol.h"
 #include "Garlic.h"
 #include "Tunnel.h"
+#include "util.h" // MemoryPool
 
 namespace i2p
 {
@@ -234,6 +235,9 @@ namespace stream
 
 			/** set max connections per minute per destination */
 			void SetMaxConnsPerMinute(const uint32_t conns);
+
+			Packet * NewPacket () { return m_PacketsPool.Acquire (); };
+			void DeletePacket (Packet * p) { if (p) m_PacketsPool.Release (p); };		
 			
 		private:		
 	
@@ -269,7 +273,9 @@ namespace stream
 			/** banned identities */
 			std::vector<i2p::data::IdentHash> m_Banned;
 			uint64_t m_LastBanClear;
-      
+
+			i2p::util::MemoryPool<Packet> m_PacketsPool;
+			
 		public:
 
 			i2p::data::GzipInflator m_Inflator;

util.h

@@ -58,8 +58,9 @@ namespace util
 
 			void Release (T * t)
 			{
+				if (!t) return;
 				t->~T ();
-				*(void * *)t = m_Head;
+				*(void * *)t = m_Head; // next
 				m_Head = t;	
 			}