Exemplo n.º 1
0
int dijkstra(int myID) {
	int i,v, iDist;
     	while (qcount() < NUM_NODES-1){	
		for (i=myID*(NUM_NODES/PROCESSORS); (i<(myID+1)*(NUM_NODES/PROCESSORS)+(myID+1==PROCESSORS && NUM_NODES%PROCESSORS!=0 ? NUM_NODES%PROCESSORS:0)); i++) {
			if(rgnNodes[i].iCatched==0 && rgnNodes[i].iDist<uVertex[myID].iDist && rgnNodes[i].iDist!=0){
				uVertex[myID].iDist=rgnNodes[i].iDist;
				uVertex[myID].iNID=i;
			}		
		}
		actuateBarrier(&myBarrier);				/* Actuate the barrier */
		if(myID==0){ 
			globalMiniCost=NONE;
			for(i=0;i<PROCESSORS;i++){			/* Get the global minimum cost */
				if(globalMiniCost>uVertex[i].iDist){
					globalMiniCost = uVertex[i].iDist;
					u=uVertex[i].iNID;
				}
			}
			g_qCount++;
		}
		actuateBarrier(&myBarrier);				/* Actuate the barrier */
		for (v=myID*(NUM_NODES/PROCESSORS); (v<(myID+1)*(NUM_NODES/PROCESSORS)+(myID+1==PROCESSORS && NUM_NODES%PROCESSORS!=0 ? NUM_NODES%PROCESSORS:0)); v++) {
			if(v==u){
				rgnNodes[v].iCatched = 1;
				continue;
			}
			if((rgnNodes[v].iCatched==0 && rgnNodes[v].iDist>(rgnNodes[u].iDist+AdjMatrix[u][v]))){			/* dist(v)>dist(u)+w(u,v) */
				rgnNodes[v].iDist=rgnNodes[u].iDist+AdjMatrix[u][v];
				rgnNodes[v].iPrev = u; 		
			}
		}
		uVertex[myID].iDist = NONE;	//Reset 
	}    
}
Exemplo n.º 2
0
int dijkstra(int myID) {
	int x,i,v,iDist;
	int chStart, chEnd;
	int u =-1;

	

	for(x=tasks[myID][0]; x<tasks[myID][1]; x++){
		chStart = nodes_tasks[x][0];	//Start node
		chEnd = nodes_tasks[x][1];	//End node
		u=-1;
		//Initialize and clear	
		uVertex[myID].iDist=NONE;
		uVertex[myID].iPID=myID;
		uVertex[myID].iNID=NONE;
		g_qCount[myID] = 0;
		u=-1;
		for (v=0; v<NUM_NODES; v++) {
			rgnNodes[myID][v].iDist =  AdjMatrix[chStart][v];
			rgnNodes[myID][v].iPrev = NONE;
			rgnNodes[myID][v].iCatched = 0;
		}	
		//Start working



     		while (qcount(myID) < NUM_NODES-1){
			for (i=0; i<NUM_NODES; i++) {
				if(rgnNodes[myID][i].iCatched==0 && rgnNodes[myID][i].iDist<uVertex[myID].iDist && rgnNodes[myID][i].iDist!=0){
					uVertex[myID].iDist=rgnNodes[myID][i].iDist;
					uVertex[myID].iNID=i;
				}		
			}				
			globalMiniCost[myID]=NONE;
			if(globalMiniCost[myID]>uVertex[myID].iDist){
				globalMiniCost[myID] = uVertex[myID].iDist;
				u=uVertex[myID].iNID;
				g_qCount[myID]++;
			}	
			for (v=0; v<NUM_NODES; v++) {
				if(v==u){
					rgnNodes[myID][v].iCatched = 1;
					continue;
				}
				if((rgnNodes[myID][v].iCatched==0 && rgnNodes[myID][v].iDist>(rgnNodes[myID][u].iDist+AdjMatrix[u][v]))){	
					rgnNodes[myID][v].iDist=rgnNodes[myID][u].iDist+AdjMatrix[u][v];	
					rgnNodes[myID][v].iPrev = u; 		
				}
			}
			uVertex[myID].iDist = NONE;	//Reset 
		}
		printResult(myID,chStart,chEnd);
	}  
}
Exemplo n.º 3
0
int dijkstra(int chStart, int chEnd) 
{
  

  
  for (ch = 0; ch < NUM_NODES; ch++)
    {
      rgnNodes[ch].iDist = NONE;
      rgnNodes[ch].iPrev = NONE;
    }

  if (chStart == chEnd) 
    {
	pthread_mutex_lock(&mutex_print);      
	printf("Shortest path is 0 in cost. Just stay where you are.\n");
	pthread_mutex_unlock(&mutex_print);
    }
  else
    {
      rgnNodes[chStart].iDist = 0;
      rgnNodes[chStart].iPrev = NONE;
      
      enqueue_static (chStart, 0, NONE);
      
     while (qcount() > 0)
	{
	  dequeue_static (&iNode, &iDist, &iPrev);
	  for (i = 0; i < NUM_NODES; i++)
	    {
	      if ((iCost = AdjMatrix[iNode][i]) != NONE)
		{
		  if ((NONE == rgnNodes[i].iDist) || 
		      (rgnNodes[i].iDist > (iCost + iDist)))
		    {
		      rgnNodes[i].iDist = iDist + iCost;
		      rgnNodes[i].iPrev = iNode;
		      enqueue_static (i, iDist + iCost, iNode);
		    }
		}
	    }
	}

      pthread_mutex_lock(&mutex_print);
      fprintf(fileout_dijkstra,"Shortest path is %d in cost. ", rgnNodes[chEnd].iDist);
      fprintf(fileout_dijkstra,"Path is: ");
      print_path(rgnNodes, chEnd);
      fprintf(fileout_dijkstra,"\n");
      pthread_mutex_unlock(&mutex_print);
      
    }
    return 1;
}
Exemplo n.º 4
0
void dijkstra(int chStart, int chEnd) 
{

	for (ch = 0; ch < NUM_NODES; ch++)
	{
		rgnNodes[ch].iDist = NONE;
		rgnNodes[ch].iPrev = NONE;
	}

	if (chStart == chEnd) 
	{
		puts("f**k\r\n");
	}
	else
	{
		rgnNodes[chStart].iDist = 0;
		rgnNodes[chStart].iPrev = NONE;

		enqueue (chStart, 0, NONE);

		while (qcount() > 0)
		{
			dequeue (&iNode, &iDist, &iPrev);
			for (i = 0; i < NUM_NODES; i++)
			{
				if ((iCost = AdjMatrix[iNode][i]) != NONE)
				{
					if ((NONE == rgnNodes[i].iDist) || (rgnNodes[i].iDist > (iCost + iDist)))
					{
						rgnNodes[i].iDist = iDist + iCost;
						rgnNodes[i].iPrev = iNode;
						enqueue (i, iDist + iCost, iNode);
					}
				}
			}
			
			
			puts("w");
			int_print(g_qCount);
			puts("\r\n");
		}
		/*      
				printf("Shortest path is %d in cost. ", rgnNodes[chEnd].iDist);
				printf("Path is: ");
				print_path(rgnNodes, chEnd);
				printf("\n");
		 */
	}
}
Exemplo n.º 5
0
int dijkstra(int chStart, int chEnd) 
{
  

  
  for (ch = 0; ch < NUM_NODES; ch++)
    {
      rgnNodes[ch].iDist = NONE;
      rgnNodes[ch].iPrev = NONE;
    }

  if (chStart == chEnd) 
    {
      printf("Shortest path is 0 in cost. Just stay where you are.\n");
    }
  else
    {
      rgnNodes[chStart].iDist = 0;
      rgnNodes[chStart].iPrev = NONE;
      
      enqueue (chStart, 0, NONE);
      int x=0;
     while (qcount() > 0)
	{
	  dequeue (&iNode, &iDist, &iPrev);
	  for (i = 0; i < NUM_NODES; i++)
	    {
	      if ((iCost = AdjMatrix[iNode][i]) != NONE)
		{
		  if ((NONE == rgnNodes[i].iDist) || 
		      (rgnNodes[i].iDist > (iCost + iDist)))
		    {
		      rgnNodes[i].iDist = iDist + iCost;
		      rgnNodes[i].iPrev = iNode;
		      enqueue (i, iDist + iCost, iNode);
		    }
		}
	    }
		x++;
	}      
	printf("x=%d\n",x);
      printf("Shortest path is %d in cost. ", rgnNodes[chEnd].iDist);
      printf("Path is: ");
      print_path(rgnNodes, chEnd);
      printf("\n");
    }
}
Exemplo n.º 6
0
int dijkstra(int chStart, int chEnd)
{
   for (ch = 0; ch < NUM_NODES; ch++)
   {
      rgnNodes[ch].iDist = NONE;
      rgnNodes[ch].iPrev = NONE;
   }

   if (chStart == chEnd)
   {
      return 0;
   }
   else
   {
      rgnNodes[chStart].iDist = 0;
      rgnNodes[chStart].iPrev = NONE;

      enqueue (chStart, 0, NONE);

      while (qcount() > 0)
      {
         QITEM *tmp = dequeue (&iNode, &iDist, &iPrev);
         if(tmp != 0)
            free(tmp);
         for (i = 0; i < NUM_NODES; i++)
         {
            iCost = AdjMatrix[iNode][i];
            if (iCost != NONE)
            {
               if ((NONE == rgnNodes[i].iDist) ||
                     (rgnNodes[i].iDist > (iCost + iDist)))
               {
                  rgnNodes[i].iDist = iDist + iCost;
                  rgnNodes[i].iPrev = iNode;
                  enqueue (i, iDist + iCost, iNode);
               }
            }
         }
      }
   }

   return rgnNodes[chEnd].iDist;
}
Exemplo n.º 7
0
void dijkstra(int myID) {
	int x,i,v;
	int chStart, chEnd;
	int u =-1;
	Echo("My id");
	Echo(itoa(myID));
	Echo("GRUPO 0");
	/*Echo(itoa(tasks[0][0]));
	Echo(itoa(tasks[1][0]));
	Echo(itoa(tasks[2][0]));
	Echo(itoa(tasks[3][0]));*/
	Echo(itoa(tasks[myID][0]));

	Echo("GRUPO 1");
	Echo(itoa(tasks[myID][1]));
	Echo("fim ");

	//RealTime(103349, 103349, 11822, 0);


	for(x=tasks[myID][0]; x<tasks[myID][1]; x++){
		chStart = nodes_tasks[x][0];	//Start node
		chEnd = nodes_tasks[x][1];		//End node
		u=-1;

		//Initialize and clear
		uVertex[myID].iDist=NONE;
		uVertex[myID].iPID=myID;
		uVertex[myID].iNID=NONE;
		g_qCount[myID] = 0;
		u=-1;
		for (v=0; v<NUM_NODES; v++) {
			rgnNodes[myID][v].iDist =  AdjMatrix[chStart][v];
			rgnNodes[myID][v].iPrev = NONE;
			rgnNodes[myID][v].iCatched = 0;
		}
		//Start working
		while (qcount(myID) < NUM_NODES-1){
			for (i=0; i<NUM_NODES; i++) {
				if(rgnNodes[myID][i].iCatched==0 && rgnNodes[myID][i].iDist<uVertex[myID].iDist && rgnNodes[myID][i].iDist!=0){
					uVertex[myID].iDist=rgnNodes[myID][i].iDist;
					uVertex[myID].iNID=i;
				}
			}
			globalMiniCost[myID]=NONE;
			if(globalMiniCost[myID]>uVertex[myID].iDist){
				globalMiniCost[myID] = uVertex[myID].iDist;
				u=uVertex[myID].iNID;
				g_qCount[myID]++;
			}
			for (v=0; v<NUM_NODES; v++) {
				if(v==u){
					rgnNodes[myID][v].iCatched = 1;
					continue;
				}
				if((rgnNodes[myID][v].iCatched==0 && rgnNodes[myID][v].iDist>(rgnNodes[myID][u].iDist+AdjMatrix[u][v]))){
					rgnNodes[myID][v].iDist=rgnNodes[myID][u].iDist+AdjMatrix[u][v];
					rgnNodes[myID][v].iPrev = u;
				}
			}
			uVertex[myID].iDist = NONE;	//Reset
		}

		sendResult(myID,chStart,chEnd);
		qtdEnvios++;
	}
	Message msg;
	msg.length = 33;
	msg.msg[0] = -1;
	Send(&msg, print);
	Echo("finaliza\n");
}