net: add a flag to indicate when a node's process queue is full

Messages are dumped very quickly from the socket handler to the processor, so
it's the depth of the processing queue that's interesting.

The socket handler checks the process queue's size during the brief message
hand-off and pauses if necessary, and the processor possibly unpauses each time
a message is popped off of its queue.

1 files changed, 2 insertions, 9 deletions

diff --git a/src/net.h b/src/net.h
index 21864e73d1..0eb430a8bf 100644
--- a/src/net.h
+++ b/src/net.h
@@ -610,6 +610,7 @@ public:
 
     CCriticalSection cs_vProcessMsg;
     std::list<CNetMessage> vProcessMsg;
+    size_t nProcessQueueSize;
 
     std::deque<CInv> vRecvGetData;
     std::list<CNetMessage> vRecvMsg;
@@ -650,6 +651,7 @@ public:
     const NodeId id;
 
     const uint64_t nKeyedNetGroup;
+    std::atomic_bool fPauseRecv;
 protected:
 
     mapMsgCmdSize mapSendBytesPerMsgCmd;
@@ -744,15 +746,6 @@ public:
     }
 
     // requires LOCK(cs_vRecvMsg)
-    unsigned int GetTotalRecvSize()
-    {
-        unsigned int total = 0;
-        BOOST_FOREACH(const CNetMessage &msg, vRecvMsg)
-            total += msg.vRecv.size() + 24;
-        return total;
-    }
-
-    // requires LOCK(cs_vRecvMsg)
     bool ReceiveMsgBytes(const char *pch, unsigned int nBytes, bool& complete);
 
     void SetRecvVersion(int nVersionIn)