Add isGpuEquipped method to GpuHost

Update classes to use isGpuEquipped method

modules/cloudsim-examples/src/main/java/org/cloudbus/cloudsim/examples/gpu/CloudSimGpuExample5.java

@@ -443,7 +443,7 @@ public class CloudSimGpuExample5 {
 				at.addRow("Host " + depth, dft.format(datacenter.getHostCpuEnergyMap().get(host)).toString() + " / "
 						+ dft.format(datacenter.getHostEnergyMap().get(host)).toString());
 				at.addRule();
-				if (host.getVideoCardAllocationPolicy() != null) {
+				if (host.isGpuEquipped()) {
 					for (PowerVideoCard videoCard : (List<PowerVideoCard>) host.getVideoCardAllocationPolicy()
 							.getVideoCards()) {
 						depth = "#" + videoCard.getId() + " / " + depth;

modules/cloudsim-examples/src/main/java/org/cloudbus/cloudsim/examples/gpu/CloudSimGpuExample6.java

@@ -452,7 +452,7 @@ public class CloudSimGpuExample6 {
 				at.addRow("Host " + depth, dft.format(datacenter.getHostCpuEnergyMap().get(host)).toString() + " / "
 						+ dft.format(datacenter.getHostEnergyMap().get(host)).toString());
 				at.addRule();
-				if (host.getVideoCardAllocationPolicy() != null) {
+				if (host.isGpuEquipped()) {
 					for (PowerVideoCard videoCard : (List<PowerVideoCard>) host.getVideoCardAllocationPolicy()
 							.getVideoCards()) {
 						depth = "#" + videoCard.getId() + " / " + depth;

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/gpu/GpuHost.java

@@ -60,7 +60,7 @@ public class GpuHost extends Host {
 
 	public double updateVgpusProcessing(double currentTime) {
 		double smallerTime = Double.MAX_VALUE;
-		if (getVideoCardAllocationPolicy() != null) {
+		if (isGpuEquipped()) {
 			// Update resident vGPUs
 			for (Vgpu vgpu : getVideoCardAllocationPolicy().getVgpuVideoCardMap().keySet()) {
 				double time = vgpu.updateGpuTaskProcessing(currentTime, getVideoCardAllocationPolicy()

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/gpu/performance/PerformanceGpuHost.java

@@ -42,7 +42,7 @@ public class PerformanceGpuHost extends GpuHost {
 	public double updateVgpusProcessing(double currentTime) {
 		double smallerTime = Double.MAX_VALUE;
 
-		if (getVideoCardAllocationPolicy() != null) {
+		if (isGpuEquipped()) {
 			List<Vgpu> runningVgpus = new ArrayList<Vgpu>();
 			for (Vgpu vgpu : getVideoCardAllocationPolicy().getVgpuVideoCardMap().keySet()) {
 				if (vgpu.getGpuTaskScheduler().runningTasks() > 0) {

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/gpu/power/PowerGpuDatacenter.java

@@ -54,7 +54,7 @@ public class PowerGpuDatacenter extends GpuDatacenter {
 			getHostCpuEnergyMap().put(powerGpuHost, 0.0);
 			getHostVideoCardEnergyMap().put(powerGpuHost, new HashMap<PowerVideoCard, Double>());
 			VideoCardAllocationPolicy videoCardAllocationPolicy = powerGpuHost.getVideoCardAllocationPolicy();
-			if (videoCardAllocationPolicy != null) {
+			if (powerGpuHost.isGpuEquipped()) {
 				for (PowerVideoCard videoCard : (List<PowerVideoCard>) videoCardAllocationPolicy.getVideoCards()) {
 					getHostVideoCardEnergyMap().get(powerGpuHost).put(videoCard, 0.0);
 				}

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/gpu/power/PowerGpuHost.java

@@ -125,7 +125,7 @@ public class PowerGpuHost extends PerformanceGpuHost {
 	 */
 	public Map<VideoCard, Double> getCurrentVideoCardsPower() {
 		Map<VideoCard, Double> videoCardsPower = new HashMap<VideoCard, Double>();
-		if (getVideoCardAllocationPolicy() != null) {
+		if (isGpuEquipped()) {
 			for (VideoCard videoCard : getVideoCardAllocationPolicy().getVideoCards()) {
 				PowerVideoCard powerVideoCard = (PowerVideoCard) videoCard;
 				videoCardsPower.put(powerVideoCard, powerVideoCard.getPower());