Flip default for callback synchronization.

Synced is likely to be more common and the safer default.

src/main/java/li/cil/oc2/api/device/object/Callback.java

@@ -31,7 +31,7 @@ public @interface Callback {
      * safe, for example the world or any objects inside the world, such as
      * tile entities and entities.
      */
-    boolean synchronize() default false;
+    boolean synchronize() default true;
 
     /**
      * Option VM visible documentation of this method.

src/main/java/li/cil/oc2/common/device/provider/EnergyStorageDeviceProvider.java

@@ -24,22 +24,22 @@ public class EnergyStorageDeviceProvider extends AbstractCapabilityBlockDevicePr
             this.energyStorage = energyStorage;
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public int getEnergyStored() {
             return energyStorage.getEnergyStored();
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public int getMaxEnergyStored() {
             return energyStorage.getMaxEnergyStored();
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public boolean canExtract() {
             return energyStorage.canExtract();
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public boolean canReceive() {
             return energyStorage.canReceive();
         }

src/main/java/li/cil/oc2/common/device/provider/FluidHandlerDeviceProvider.java

@@ -25,17 +25,17 @@ public class FluidHandlerDeviceProvider extends AbstractCapabilityBlockDevicePro
             this.fluidHandler = fluidHandler;
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public int getTanks() {
             return fluidHandler.getTanks();
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public FluidStack getFluidInTank(final int tank) {
             return fluidHandler.getFluidInTank(tank);
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public int getTankCapacity(final int tank) {
             return fluidHandler.getTankCapacity(tank);
         }

src/main/java/li/cil/oc2/common/device/provider/ItemHandlerDeviceProvider.java

@@ -25,17 +25,17 @@ public class ItemHandlerDeviceProvider extends AbstractCapabilityBlockDeviceProv
             this.itemHandler = itemHandler;
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public int getSlots() {
             return itemHandler.getSlots();
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public ItemStack getStackInSlot(final int slot) {
             return itemHandler.getStackInSlot(slot);
         }
 
-        @Callback(synchronize = true)
+        @Callback
         public int getSlotLimit(final int slot) {
             return itemHandler.getSlotLimit(slot);
         }

src/test/java/li/cil/oc2/vm/ObjectDeviceProtocolTests.java

@@ -178,13 +178,13 @@ public class ObjectDeviceProtocolTests {
     }
 
     public static final class SimpleObject {
-        @Callback
+        @Callback(synchronize = false)
         public int add(@Parameter("a") final int a,
                        @Parameter("b") final int b) {
             return a + b;
         }
 
-        @Callback
+        @Callback(synchronize = false)
         public int div(@Parameter("a") final long a,
                        @Parameter("b") final long b) {
             return (int) (a / b);