Work in progress for the MPI Fmm

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/scalfmm/scalfmm/trunk@161 2616d619-271b-44dc-8df4-d4a8f33a7222

Src/Containers/FBufferVector.hpp

-#ifndef FBUFFERVECTOR_HPP
-#define FBUFFERVECTOR_HPP
-// /!\ Please, you must read the license at the bottom of this page
-
-#include "../Utils/FAssertable.hpp"
-// To get memcpy
-#include <cstring>
-
-/**
-* @author Berenger Bramas (berenger.bramas@inria.fr)
-* @class FBufferVector
-* Please read the license
-* This class is a buffer to send big data via MPI.
-* It has a capacity and alloc an array only if needed.
-* You have to be sure that the buffer is not full before adding any data.
-* This can be done by checking :
-* <code>
-* if(!sendBuffer.addEnoughSpace(object->bytesToSendUp())){<br>
-*    app.sendData(idxReceiver,sendBuffer.getSize(),sendBuffer.getData(),globalTag);<br>
-*    sendBuffer.clear();<br>
-* }<br>
-* sendBuffer.addDataUp(tag,object);<br>
-* </code>
-*/
-template <int Capacity>
-        class FBufferVector : protected FAssertable {
-    // the Buffer (can be null)
-    char* buffer;
-    // current ocupped size
-    int occuped;
-
-    // check if buffer is allocated if not does it
-    void checkBuffer(){
-        if(!buffer){
-            buffer = new char[Capacity];
-        }
-    }
-
-public:
-    // Constructor, set buffer to null
-    FBufferVector() : buffer(0), occuped(0) {
-        fassert(Capacity > 0, "Capacity has to be positive", __LINE__, __FILE__);
-    }
-
-    // Dealloc buffer if needed
-    ~FBufferVector(){
-        if(buffer) delete(buffer);
-    }
-
-    // To check if there is enough free space
-    bool addEnoughSpace(const int neededSpace) const{
-        return occuped + neededSpace + sizeof(int) <= Capacity;
-    }
-
-    // get the capacity of the buffer
-    int getCapacity() const{
-        return Capacity;
-    }
-
-    // get the current size
-    int getSize(){
-        return occuped;
-    }
-
-    // get a pointer to the buffer
-    void* getData() {
-        return buffer;
-    }
-
-    // ask to an object to write himself into the buffer
-    // and update occuped space
-    template < class T >
-    void addDataUp(const int tag, const T& object){
-        checkBuffer();
-        memcpy(&buffer[occuped],&tag,sizeof(int));
-        occuped += sizeof(int);
-        occuped += object.writeUp(&buffer[occuped], Capacity - occuped);
-    }
-
-    // ask to an object to write himself into the buffer
-    // and update occuped space
-    template < class T >
-    void addDataDown(const int tag, const T& object){
-        checkBuffer();
-        memcpy(&buffer[occuped],&tag,sizeof(int));
-        occuped += sizeof(int);
-        occuped += object.writeDown(&buffer[occuped], Capacity - occuped);
-    }
-
-    // reset occuped memory
-    void clear(){
-        occuped = 0;
-    }
-};
-
-
-#endif //FBUFFERVECTOR_HPP
-
-// [--LICENSE--]