bool operator()( T &v ) {
    v = (T)my_count.fetch_and_increment();
    if ( (int)v < N )
       return true;
    else
       return false;
 } 
Example #2
0
    void operator () (const tbb::blocked_range<int> &range) const {
        int i; 
        PARTITIONER partitioner;
        for (i=range.begin(); i<range.end(); i++) {
            //printf("Outer Loop Body[%d<=%d<%d]=[0,%d]\n", range.begin(), i, range.end(), degrees[currentLevelSet[i]]);
#ifdef SEQUENTIAL_INNER
            for(int j=0; j<degrees[currentLevelSet[i]]; j++) {
                int oldGatek;
                int freshNode,currentEdge;

                currentEdge = vertices[currentLevelSet[i]]+j;
                // let's handle one edge
#ifdef XBOFILE
                freshNode = edges[currentEdge][1]; // 0 RTM, value was prefetched
#else
                freshNode = edges[currentEdge];    // 0 RTM, value was prefetched
#endif
                oldGatek = -1;
                // test gatekeeper 
                oldGatek = gatekeeper[freshNode].fetch_and_increment();
                if (oldGatek == 0) { // destination vertex unvisited!
                    // increment newLevelIndex atomically
                    int myIndex = newLevelIndex.fetch_and_increment();
                    // store fresh node in new level
                    newLevelSet[myIndex] = freshNode;
 
                    level[freshNode] = currentLevel + 1;
                } // end if freshNode
            }
#else
            tbb::parallel_for (tbb::blocked_range<int>(0,degrees[currentLevelSet[i]],INNER_GRAINSIZE), innerLoopBody(i), partitioner);
#endif
        }
    }
Example #3
0
    void operator () (const tbb::blocked_range<int> &range) const {
        int j;
        for(j=range.begin(); j<range.end(); j++) {
            //printf("Inner Loop Body (x,y)=(%d,%d) where y in [%d,%d)\n", i,j,range.begin(), range.end() );
	    int oldGatek;
            int freshNode,currentEdge;

            currentEdge = vertices[currentLevelSet[i]]+j;
            // let's handle one edge
#ifdef XBOFILE
            freshNode = edges[currentEdge][1]; // 0 RTM, value was prefetched
#else
            freshNode = edges[currentEdge];    // 0 RTM, value was prefetched
#endif
            oldGatek = -1;
            // test gatekeeper 
            oldGatek = gatekeeper[freshNode].fetch_and_increment();
	    if (oldGatek == 0) { // destination vertex unvisited!
                // increment newLevelIndex atomically
                int myIndex = newLevelIndex.fetch_and_increment();
	        // store fresh node in new level
	        newLevelSet[myIndex] = freshNode;

	        level[freshNode] = currentLevel + 1;
	    } // end if freshNode
        } // end for j
    }
Example #4
0
 bool nextTaskID(std::size_t &taskID)
 {
   taskID = counter.fetch_and_increment();
   return taskID < NofAtom;
 }