small change in commbuffer

git-svn-id: https://dune.mathematik.uni-freiburg.de/svn/alugrid/trunk@1146 0d966ed9-3843-0410-af09-ebfb50bd7c74

src/duneinterface/gitter_dune_pll_impl.cc

@@ -336,7 +336,7 @@ void GitterDunePll :: unpackOnMaster (
     // read data marker 
     recvBuff.readObject(hasdata);
     
-    item.reserveBuffer( nl + 1 );
+    item.reserveAndClearBuffer( nl + 1 );
     DataBufferType & data = item.commBuffer();
 
     // only gather master data once 
@@ -344,7 +344,6 @@ void GitterDunePll :: unpackOnMaster (
     {
       // pack master data 
       BufferType & mData = data[nl]; 
-      mData.clear();
         
       // write master data to fake buffer 
       dataHandle.sendData(mData,item);
@@ -353,13 +352,12 @@ void GitterDunePll :: unpackOnMaster (
     // if data has been send, read data 
     if (hasdata != noData) 
     {
-      // pack slave data to tmnp buffer 
-      BufferType & v = data[link]; 
-      v.clear();
+      // pack slave data to tmp buffer 
+      BufferType & slaveBuff = data[link]; 
 
       int dataSize; 
       recvBuff.readObject(dataSize);
-      recvBuff.readStream(v,dataSize);
+      recvBuff.readStream(slaveBuff, dataSize);
     }
   }
   delete a.first;

src/serial/parallel.h

@@ -12,6 +12,7 @@ class Parallel {
 
     class CommunicationBuffer 
     {
+        CommunicationBuffer ( const CommunicationBuffer& );
       protected:
         typedef vector < SmallObjectStream > BufferType; 
         BufferType * _buff; 
@@ -19,12 +20,14 @@ class Parallel {
         CommunicationBuffer () : _buff(0) {}
         ~CommunicationBuffer () { if(_buff) delete _buff; }
       public:   
-        void reserveBuffer (int size)
+        void reserveAndClearBuffer (const size_t size)
         {
           if(_buff) 
           {
-            if(size > (int) _buff->size())
-              _buff->resize(size);
+            BufferType& buff = *_buff;
+            if(size > buff.size()) buff.resize(size);
+            // reset read and write counters 
+            for(size_t i=0; i<size; ++i) buff[i].clear();
           }
           else 
           {