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App/v8world/IPipelined.h

@@ -0,0 +1,88 @@
+ /* Copyright 2003-2005 ROBLOX Corporation, All Rights Reserved */
+
+#pragma once
+
+#include "V8World/IWorldStage.h"
+#include "rbx/Debug.h"
+
+namespace RBX {
+
+	class Kernel;
+
+	class RBXBaseClass IPipelined
+	{
+	private:
+		IStage*		currentStage;
+
+		void removeFromStage(IStage::StageType stageType);
+
+		IStage* getStage(IStage::StageType stageType) const;	
+	public:
+		IPipelined() : currentStage(NULL)
+		{}
+	
+		virtual ~IPipelined() {
+			RBXASSERT(currentStage == NULL);
+			currentStage = static_cast<IStage*>(Debugable::badMemory());
+		}
+
+		void putInPipeline(IStage* stage);
+
+		void removeFromPipeline(IStage* stage);
+
+		void putInStage(IStage* stage);
+
+		void removeFromStage(IStage* stage);
+
+		bool inPipeline() const {
+			return (currentStage != NULL);
+		}
+
+		const IStage* getCurrentStage() const {return currentStage;}
+
+		bool inStage(IStage::StageType stageType) const {
+			RBXASSERT(currentStage);
+			return (currentStage && (currentStage->getStageType() == stageType));
+		}
+
+		bool inStage(IStage* iStage) const {
+			RBXASSERT(iStage);
+			RBXASSERT(currentStage);
+			return (currentStage == iStage);
+		}
+
+		bool inOrDownstreamOfStage(IStage::StageType stageType) const {
+			RBXASSERT(currentStage);
+			return (currentStage && (currentStage->getStageType() >= stageType));
+		}
+
+		bool inOrDownstreamOfStage(IStage* iStage) const {
+			RBXASSERT(iStage);
+			RBXASSERT(currentStage);
+			return (currentStage && iStage && (currentStage->getStageType() >= iStage->getStageType()));
+		}
+
+		bool downstreamOfStage(IStage* iStage) const {
+			RBXASSERT(iStage);
+			RBXASSERT(currentStage);
+			return (currentStage && iStage && currentStage->getStageType() > iStage->getStageType());
+		}
+
+		bool inKernel() const							{return inStage(IStage::KERNEL_STAGE);}
+		Kernel* getKernel() const;						// should never fail		
+
+		virtual void putInKernel(Kernel* kernel);
+		virtual void removeFromKernel();
+
+		World* findWorld() {
+			if (!currentStage) {
+				return NULL;
+			}
+			else {
+				IStage* worldStage = (!inKernel()) ? currentStage : currentStage->getUpstream();
+				return rbx_static_cast<IWorldStage*>(worldStage)->getWorld();
+			}
+		}
+	};
+
+}	// namespace