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package gregtech.api.threads;
import gregtech.api.GregTech_API;
import gregtech.api.interfaces.metatileentity.IMetaTileEntity;
import gregtech.api.interfaces.tileentity.IGregTechTileEntity;
import gregtech.api.interfaces.tileentity.IMachineBlockUpdateable;
import gregtech.api.metatileentity.implementations.GT_MetaPipeEntity_Cable;
import gregtech.api.metatileentity.implementations.GT_MetaPipeEntity_Fluid;
import gregtech.api.metatileentity.implementations.GT_MetaPipeEntity_Item;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.ChunkPosition;
import net.minecraft.world.World;
import java.util.HashSet;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.ConcurrentLinkedQueue;
public class GT_Runnable_MachineBlockUpdate implements Runnable {
private static int mX;
private static int mY;
private static int mZ;
private static World mWorld;
private static final Set<ChunkPosition> mVisited = new HashSet<>(80);
//Threading
private static boolean allowedToRun; //makes if this thread is idle
private static final Queue<Coordinates> toUpdate = new ConcurrentLinkedQueue<>(); //blocks added while this thread ran
private static final Thread INSTANCETHREAD = new Thread(new GT_Runnable_MachineBlockUpdate(), "Machine Block Updates"); //Instance of this thread
//This class should never be initiated outside of this class!
private GT_Runnable_MachineBlockUpdate() {
}
public static synchronized void setmX(int mX) {
GT_Runnable_MachineBlockUpdate.mX = mX;
}
public static synchronized void setmY(int mY) {
GT_Runnable_MachineBlockUpdate.mY = mY;
}
public static synchronized void setmZ(int mZ) {
GT_Runnable_MachineBlockUpdate.mZ = mZ;
}
public static synchronized void setmWorld(World mWorld) {
GT_Runnable_MachineBlockUpdate.mWorld = mWorld;
}
/**
* Clears the mVisited HashSet
*/
public static synchronized void resetVisited() {
synchronized (GT_Runnable_MachineBlockUpdate.mVisited) {
GT_Runnable_MachineBlockUpdate.mVisited.clear();
}
}
/**
* Never call this Method without checking if the thead is NOT allowed to run!
*/
private static void setMachineUpdateValuesUnsafe(World aWorld, int aX, int aY, int aZ){
GT_Runnable_MachineBlockUpdate.setmZ(aZ);
GT_Runnable_MachineBlockUpdate.setmY(aY);
GT_Runnable_MachineBlockUpdate.setmX(aX);
GT_Runnable_MachineBlockUpdate.setmWorld(aWorld);
GT_Runnable_MachineBlockUpdate.resetVisited();
GT_Runnable_MachineBlockUpdate.setAllowedToRun(true);
synchronized (toUpdate) {
if (GT_Runnable_MachineBlockUpdate.INSTANCETHREAD.getState() == Thread.State.WAITING)
GT_Runnable_MachineBlockUpdate.toUpdate.notify();
}
}
/**
* If the thread is idleing, sets new values and remove the idle flag, otherwise, queue the cooridinates.
*/
public static synchronized void setMachineUpdateValues(World aWorld, int aX, int aY, int aZ) {
if (GT_Runnable_MachineBlockUpdate.isAllowedToRun()) {
toUpdate.add(new Coordinates(aX, aY, aZ, aWorld));
} else {
GT_Runnable_MachineBlockUpdate.setMachineUpdateValuesUnsafe(aWorld, aX, aY, aZ);
}
}
private static class Coordinates {
private final int mX;
private final int mY;
private final int mZ;
private final World mWorld;
public Coordinates(int mX, int mY, int mZ, World mWorld) {
this.mX = mX;
this.mY = mY;
this.mZ = mZ;
this.mWorld = mWorld;
}
/**
* Updated the Main Update Thread while its Idle
*/
public void update() {
GT_Runnable_MachineBlockUpdate.setMachineUpdateValues(this.mWorld,this.mX,this.mY,this.mZ);
}
}
public static synchronized boolean isAllowedToRun() {
return allowedToRun;
}
public static synchronized void setAllowedToRun(boolean unlocked) {
GT_Runnable_MachineBlockUpdate.allowedToRun = unlocked;
}
public static Thread getINSTANCETHREAD() {
return INSTANCETHREAD;
}
private boolean shouldRecurse(TileEntity aTileEntity, int aX, int aY, int aZ) {
if (aTileEntity instanceof IGregTechTileEntity) {
// Stop recursion on GregTech cables, item pipes, and fluid pipes
IMetaTileEntity tMetaTileEntity = ((IGregTechTileEntity) aTileEntity).getMetaTileEntity();
if ((tMetaTileEntity instanceof GT_MetaPipeEntity_Cable) ||
(tMetaTileEntity instanceof GT_MetaPipeEntity_Fluid) ||
(tMetaTileEntity instanceof GT_MetaPipeEntity_Item))
return false;
}
return (aTileEntity instanceof IMachineBlockUpdateable) ||
GregTech_API.isMachineBlock(mWorld.getBlock(aX, aY, aZ), mWorld.getBlockMetadata(aX, aY, aZ));
}
private void stepToUpdateMachine(int aX, int aY, int aZ) {
if (!mVisited.add(new ChunkPosition(aX, aY, aZ)))
return;
TileEntity tTileEntity = mWorld.getTileEntity(aX, aY, aZ);
if (tTileEntity instanceof IMachineBlockUpdateable)
((IMachineBlockUpdateable) tTileEntity).onMachineBlockUpdate();
if (mVisited.size() < 5 || shouldRecurse(tTileEntity, aX, aY, aZ)) {
stepToUpdateMachine(aX + 1, aY, aZ);
stepToUpdateMachine(aX - 1, aY, aZ);
stepToUpdateMachine(aX, aY + 1, aZ);
stepToUpdateMachine(aX, aY - 1, aZ);
stepToUpdateMachine(aX, aY, aZ + 1);
stepToUpdateMachine(aX, aY, aZ - 1);
}
}
@Override
public void run() {
for(;;) { //infinite loop
if (isAllowedToRun()) {//Are we ready to work?
try {
stepToUpdateMachine(mX, mY, mZ);
} catch (Throwable e) {/**/}
setAllowedToRun(false); //Work is finished, wait for new Coords.
} else {
//Checkes if the Update Queue has members
//DO NOT USE OPTIONALS HERE!
synchronized (toUpdate) {
Coordinates coordinates = toUpdate.poll();
if (coordinates != null) {
coordinates.update();
} else {
try {
toUpdate.wait();
} catch (InterruptedException ignored) {
return;
}
}
}
}
}
}
}
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