JavaScriptCore/kjs/JSGlobalObject.h - WebKit - Git at Google

 // -*- c-basic-offset: 4 -*-
 /*
  *  Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  *  Copyright (C) 2007 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public License
  *  along with this library; see the file COPYING.LIB.  If not, write to
  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  *  Boston, MA 02110-1301, USA.
  *
  */

 #ifndef KJS_GlobalObject_h
 #define KJS_GlobalObject_h

 #include "JSVariableObject.h"
 #include "Activation.h"

 namespace KJS {

     class ActivationImp;
     class ArrayObjectImp;
     class ArrayPrototype;
     class BooleanObjectImp;
     class BooleanPrototype;
     class DateObjectImp;
     class DatePrototype;
     class Debugger;
     class ErrorObjectImp;
     class ErrorPrototype;
     class EvalError;
     class EvalErrorPrototype;
     class FunctionObjectImp;
     class FunctionPrototype;
     struct HashTable;
     class JSGlobalObject;
     class NativeErrorImp;
     class NativeErrorPrototype;
     class NumberObjectImp;
     class NumberPrototype;
     class ObjectObjectImp;
     class ObjectPrototype;
     class PrototypeReflexiveFunction;
     class RangeError;
     class RangeErrorPrototype;
     class ReferenceError;
     class ReferenceError;
     class ReferenceErrorPrototype;
     class RegExpObjectImp;
     class RegExpPrototype;
     class RuntimeMethod;
     class ScopeChain;
     class StringObjectImp;
     class StringPrototype;
     class SyntaxErrorPrototype;
     class TypeError;
     class TypeErrorPrototype;
     class UriError;
     class UriErrorPrototype;
     struct ActivationStackNode;
     struct ThreadClassInfoHashTables;

     typedef Vector<ExecState*, 16> ExecStateStack;

     class JSGlobalObject : public JSVariableObject {
     protected:
         using JSVariableObject::JSVariableObjectData;

         struct JSGlobalObjectData : public JSVariableObjectData {
             JSGlobalObjectData()
                 : JSVariableObjectData(&inlineSymbolTable)
             {
             }

             JSGlobalObject* next;
             JSGlobalObject* prev;

             Debugger* debugger;

             OwnPtr<GlobalExecState> globalExec;
             int recursion;

             unsigned timeoutTime;
             unsigned timeAtLastCheckTimeout;
             unsigned timeExecuting;
             unsigned timeoutCheckCount;
             unsigned tickCount;
             unsigned ticksUntilNextTimeoutCheck;

             ObjectObjectImp* objectConstructor;
             FunctionObjectImp* functionConstructor;
             ArrayObjectImp* arrayConstructor;
             BooleanObjectImp* booleanConstructor;
             StringObjectImp* stringConstructor;
             NumberObjectImp* numberConstructor;
             DateObjectImp* dateConstructor;
             RegExpObjectImp* regExpConstructor;
             ErrorObjectImp* errorConstructor;
             NativeErrorImp* evalErrorConstructor;
             NativeErrorImp* rangeErrorConstructor;
             NativeErrorImp* referenceErrorConstructor;
             NativeErrorImp* syntaxErrorConstructor;
             NativeErrorImp* typeErrorConstructor;
             NativeErrorImp* URIErrorConstructor;

             PrototypeReflexiveFunction* evalFunction;

             ObjectPrototype* objectPrototype;
             FunctionPrototype* functionPrototype;
             ArrayPrototype* arrayPrototype;
             BooleanPrototype* booleanPrototype;
             StringPrototype* stringPrototype;
             NumberPrototype* numberPrototype;
             DatePrototype* datePrototype;
             RegExpPrototype* regExpPrototype;
             ErrorPrototype* errorPrototype;
             NativeErrorPrototype* evalErrorPrototype;
             NativeErrorPrototype* rangeErrorPrototype;
             NativeErrorPrototype* referenceErrorPrototype;
             NativeErrorPrototype* syntaxErrorPrototype;
             NativeErrorPrototype* typeErrorPrototype;
             NativeErrorPrototype* URIErrorPrototype;

             SymbolTable inlineSymbolTable;

             ExecStateStack activeExecStates;

             ActivationStackNode* activations;
             size_t activationCount;

             unsigned pageGroupIdentifier;

             OwnPtr<HashSet<JSObject*> > arrayVisitedElements; // Global data shared by array prototype functions.

             PerThreadData perThreadData;
         };

     public:
         JSGlobalObject()
             : JSVariableObject(new JSGlobalObjectData)
         {
             init(this);
         }

     protected:
         JSGlobalObject(JSValue* proto, JSObject* globalThisValue)
             : JSVariableObject(proto, new JSGlobalObjectData)
         {
             init(globalThisValue);
         }

     public:
         virtual ~JSGlobalObject();

         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
         virtual void put(ExecState*, const Identifier&, JSValue*);
         virtual void putWithAttributes(ExecState*, const Identifier& propertyName, JSValue* value, unsigned attributes);

         // Per-thread linked list of all global objects.
         static JSGlobalObject*& head();
         JSGlobalObject* next() { return d()->next; }

         // Resets the global object to contain only built-in properties, sets
         // the global object's prototype to "prototype," then adds the
         // default object prototype to the tail of the global object's
         // prototype chain.
         void reset(JSValue* prototype);

         // The following accessors return pristine values, even if a script
         // replaces the global object's associated property.

         ObjectObjectImp* objectConstructor() const { return d()->objectConstructor; }
         FunctionObjectImp* functionConstructor() const { return d()->functionConstructor; }
         ArrayObjectImp* arrayConstructor() const { return d()->arrayConstructor; }
         BooleanObjectImp* booleanConstructor() const { return d()->booleanConstructor; }
         StringObjectImp* stringConstructor() const{ return d()->stringConstructor; }
         NumberObjectImp* numberConstructor() const{ return d()->numberConstructor; }
         DateObjectImp* dateConstructor() const{ return d()->dateConstructor; }
         RegExpObjectImp* regExpConstructor() const { return d()->regExpConstructor; }
         ErrorObjectImp* errorConstructor() const { return d()->errorConstructor; }
         NativeErrorImp* evalErrorConstructor() const { return d()->evalErrorConstructor; }
         NativeErrorImp* rangeErrorConstructor() const { return d()->rangeErrorConstructor; }
         NativeErrorImp* referenceErrorConstructor() const { return d()->referenceErrorConstructor; }
         NativeErrorImp* syntaxErrorConstructor() const { return d()->syntaxErrorConstructor; }
         NativeErrorImp* typeErrorConstructor() const { return d()->typeErrorConstructor; }
         NativeErrorImp* URIErrorConstructor() const { return d()->URIErrorConstructor; }

         PrototypeReflexiveFunction* evalFunction() const { return d()->evalFunction; }

         ObjectPrototype* objectPrototype() const { return d()->objectPrototype; }
         FunctionPrototype* functionPrototype() const { return d()->functionPrototype; }
         ArrayPrototype* arrayPrototype() const { return d()->arrayPrototype; }
         BooleanPrototype* booleanPrototype() const { return d()->booleanPrototype; }
         StringPrototype* stringPrototype() const { return d()->stringPrototype; }
         NumberPrototype* numberPrototype() const { return d()->numberPrototype; }
         DatePrototype* datePrototype() const { return d()->datePrototype; }
         RegExpPrototype* regExpPrototype() const { return d()->regExpPrototype; }
         ErrorPrototype* errorPrototype() const { return d()->errorPrototype; }
         NativeErrorPrototype* evalErrorPrototype() const { return d()->evalErrorPrototype; }
         NativeErrorPrototype* rangeErrorPrototype() const { return d()->rangeErrorPrototype; }
         NativeErrorPrototype* referenceErrorPrototype() const { return d()->referenceErrorPrototype; }
         NativeErrorPrototype* syntaxErrorPrototype() const { return d()->syntaxErrorPrototype; }
         NativeErrorPrototype* typeErrorPrototype() const { return d()->typeErrorPrototype; }
         NativeErrorPrototype* URIErrorPrototype() const { return d()->URIErrorPrototype; }

         void setPageGroupIdentifier(unsigned value) { d()->pageGroupIdentifier = value; }
         unsigned pageGroupIdentifier() const { return d()->pageGroupIdentifier; }

         void setTimeoutTime(unsigned timeoutTime) { d()->timeoutTime = timeoutTime; }
         void startTimeoutCheck();
         void stopTimeoutCheck();
         bool timedOut();

         Debugger* debugger() const { return d()->debugger; }
         void setDebugger(Debugger* debugger) { d()->debugger = debugger; }

         int recursion() { return d()->recursion; }
         void incRecursion() { ++d()->recursion; }
         void decRecursion() { --d()->recursion; }

         virtual void mark();

         virtual bool isGlobalObject() const { return true; }
         virtual JSGlobalObject* toGlobalObject(ExecState*) const;

         virtual ExecState* globalExec();

         virtual bool shouldInterruptScript() const { return true; }

         virtual bool allowsAccessFrom(const JSGlobalObject*) const { return true; }

         ActivationImp* pushActivation(ExecState*);
         void popActivation();
         void tearOffActivation(ExecState*, bool markAsRelic = false);

         virtual bool isDynamicScope() const;

         ExecStateStack& activeExecStates() const { return d()->activeExecStates; }

         HashSet<JSObject*>& arrayVisitedElements() { if (!d()->arrayVisitedElements) d()->arrayVisitedElements.set(new HashSet<JSObject*>); return *d()->arrayVisitedElements; }

         // Per-thread hash tables, cached on the global object for faster access.
         const PerThreadData* perThreadData() const { return &d()->perThreadData; }

         // Initialize and/or retrieve per-thread hash tables - use perThreadData() for faster access instead.
         static ThreadClassInfoHashTables* threadClassInfoHashTables();

         void* operator new(size_t);

     private:
         void init(JSObject* thisValue);

         JSGlobalObjectData* d() const { return static_cast<JSGlobalObjectData*>(JSVariableObject::d); }

         bool checkTimeout();
         void resetTimeoutCheck();

         void deleteActivationStack();
         void checkActivationCount();
     };

     inline bool JSGlobalObject::timedOut()
     {
         d()->tickCount++;

         if (d()->tickCount != d()->ticksUntilNextTimeoutCheck)
             return false;

         return checkTimeout();
     }

     inline ActivationImp* JSGlobalObject::pushActivation(ExecState* exec)
     {
         if (d()->activationCount == activationStackNodeSize) {
             ActivationStackNode* newNode = new ActivationStackNode;
             newNode->prev = d()->activations;
             d()->activations = newNode;
             d()->activationCount = 0;
         }

         StackActivation* stackEntry = &d()->activations->data[d()->activationCount++];
         stackEntry->activationStorage.init(exec);
         return &stackEntry->activationStorage;
     }

     inline void JSGlobalObject::checkActivationCount()
     {
         if (!d()->activationCount) {
             ActivationStackNode* prev = d()->activations->prev;
             ASSERT(prev);
             delete d()->activations;
             d()->activations = prev;
             d()->activationCount = activationStackNodeSize;
         }
     }

     inline void JSGlobalObject::popActivation()
     {
         checkActivationCount();
         d()->activations->data[--d()->activationCount].activationDataStorage.localStorage.shrink(0);
     }

 } // namespace KJS

 #endif // KJS_GlobalObject_h
	// -- c-basic-offset: 4 --
	/*
	* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
	* Copyright (C) 2007 Apple Inc. All rights reserved.
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public License
	* along with this library; see the file COPYING.LIB. If not, write to
	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*
	*/

	#ifndef KJS_GlobalObject_h
	#define KJS_GlobalObject_h

	#include "JSVariableObject.h"
	#include "Activation.h"

	namespace KJS {

	class ActivationImp;
	class ArrayObjectImp;
	class ArrayPrototype;
	class BooleanObjectImp;
	class BooleanPrototype;
	class DateObjectImp;
	class DatePrototype;
	class Debugger;
	class ErrorObjectImp;
	class ErrorPrototype;
	class EvalError;
	class EvalErrorPrototype;
	class FunctionObjectImp;
	class FunctionPrototype;
	struct HashTable;
	class JSGlobalObject;
	class NativeErrorImp;
	class NativeErrorPrototype;
	class NumberObjectImp;
	class NumberPrototype;
	class ObjectObjectImp;
	class ObjectPrototype;
	class PrototypeReflexiveFunction;
	class RangeError;
	class RangeErrorPrototype;
	class ReferenceError;
	class ReferenceError;
	class ReferenceErrorPrototype;
	class RegExpObjectImp;
	class RegExpPrototype;
	class RuntimeMethod;
	class ScopeChain;
	class StringObjectImp;
	class StringPrototype;
	class SyntaxErrorPrototype;
	class TypeError;
	class TypeErrorPrototype;
	class UriError;
	class UriErrorPrototype;
	struct ActivationStackNode;
	struct ThreadClassInfoHashTables;

	typedef Vector<ExecState*, 16> ExecStateStack;

	class JSGlobalObject : public JSVariableObject {
	protected:
	using JSVariableObject::JSVariableObjectData;

	struct JSGlobalObjectData : public JSVariableObjectData {
	JSGlobalObjectData()
	: JSVariableObjectData(&inlineSymbolTable)
	{
	}

	JSGlobalObject* next;
	JSGlobalObject* prev;

	Debugger* debugger;

	OwnPtr<GlobalExecState> globalExec;
	int recursion;

	unsigned timeoutTime;
	unsigned timeAtLastCheckTimeout;
	unsigned timeExecuting;
	unsigned timeoutCheckCount;
	unsigned tickCount;
	unsigned ticksUntilNextTimeoutCheck;

	ObjectObjectImp* objectConstructor;
	FunctionObjectImp* functionConstructor;
	ArrayObjectImp* arrayConstructor;
	BooleanObjectImp* booleanConstructor;
	StringObjectImp* stringConstructor;
	NumberObjectImp* numberConstructor;
	DateObjectImp* dateConstructor;
	RegExpObjectImp* regExpConstructor;
	ErrorObjectImp* errorConstructor;
	NativeErrorImp* evalErrorConstructor;
	NativeErrorImp* rangeErrorConstructor;
	NativeErrorImp* referenceErrorConstructor;
	NativeErrorImp* syntaxErrorConstructor;
	NativeErrorImp* typeErrorConstructor;
	NativeErrorImp* URIErrorConstructor;

	PrototypeReflexiveFunction* evalFunction;

	ObjectPrototype* objectPrototype;
	FunctionPrototype* functionPrototype;
	ArrayPrototype* arrayPrototype;
	BooleanPrototype* booleanPrototype;
	StringPrototype* stringPrototype;
	NumberPrototype* numberPrototype;
	DatePrototype* datePrototype;
	RegExpPrototype* regExpPrototype;
	ErrorPrototype* errorPrototype;
	NativeErrorPrototype* evalErrorPrototype;
	NativeErrorPrototype* rangeErrorPrototype;
	NativeErrorPrototype* referenceErrorPrototype;
	NativeErrorPrototype* syntaxErrorPrototype;
	NativeErrorPrototype* typeErrorPrototype;
	NativeErrorPrototype* URIErrorPrototype;

	SymbolTable inlineSymbolTable;

	ExecStateStack activeExecStates;

	ActivationStackNode* activations;
	size_t activationCount;

	unsigned pageGroupIdentifier;

	OwnPtr<HashSet<JSObject*> > arrayVisitedElements; // Global data shared by array prototype functions.

	PerThreadData perThreadData;
	};

	public:
	JSGlobalObject()
	: JSVariableObject(new JSGlobalObjectData)
	{
	init(this);
	}

	protected:
	JSGlobalObject(JSValue* proto, JSObject* globalThisValue)
	: JSVariableObject(proto, new JSGlobalObjectData)
	{
	init(globalThisValue);
	}

	public:
	virtual ~JSGlobalObject();

	virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
	virtual void put(ExecState, const Identifier&, JSValue);
	virtual void putWithAttributes(ExecState, const Identifier& propertyName, JSValue value, unsigned attributes);

	// Per-thread linked list of all global objects.
	static JSGlobalObject*& head();
	JSGlobalObject* next() { return d()->next; }

	// Resets the global object to contain only built-in properties, sets
	// the global object's prototype to "prototype," then adds the
	// default object prototype to the tail of the global object's
	// prototype chain.
	void reset(JSValue* prototype);

	// The following accessors return pristine values, even if a script
	// replaces the global object's associated property.

	ObjectObjectImp* objectConstructor() const { return d()->objectConstructor; }
	FunctionObjectImp* functionConstructor() const { return d()->functionConstructor; }
	ArrayObjectImp* arrayConstructor() const { return d()->arrayConstructor; }
	BooleanObjectImp* booleanConstructor() const { return d()->booleanConstructor; }
	StringObjectImp* stringConstructor() const{ return d()->stringConstructor; }
	NumberObjectImp* numberConstructor() const{ return d()->numberConstructor; }
	DateObjectImp* dateConstructor() const{ return d()->dateConstructor; }
	RegExpObjectImp* regExpConstructor() const { return d()->regExpConstructor; }
	ErrorObjectImp* errorConstructor() const { return d()->errorConstructor; }
	NativeErrorImp* evalErrorConstructor() const { return d()->evalErrorConstructor; }
	NativeErrorImp* rangeErrorConstructor() const { return d()->rangeErrorConstructor; }
	NativeErrorImp* referenceErrorConstructor() const { return d()->referenceErrorConstructor; }
	NativeErrorImp* syntaxErrorConstructor() const { return d()->syntaxErrorConstructor; }
	NativeErrorImp* typeErrorConstructor() const { return d()->typeErrorConstructor; }
	NativeErrorImp* URIErrorConstructor() const { return d()->URIErrorConstructor; }

	PrototypeReflexiveFunction* evalFunction() const { return d()->evalFunction; }

	ObjectPrototype* objectPrototype() const { return d()->objectPrototype; }
	FunctionPrototype* functionPrototype() const { return d()->functionPrototype; }
	ArrayPrototype* arrayPrototype() const { return d()->arrayPrototype; }
	BooleanPrototype* booleanPrototype() const { return d()->booleanPrototype; }
	StringPrototype* stringPrototype() const { return d()->stringPrototype; }
	NumberPrototype* numberPrototype() const { return d()->numberPrototype; }
	DatePrototype* datePrototype() const { return d()->datePrototype; }
	RegExpPrototype* regExpPrototype() const { return d()->regExpPrototype; }
	ErrorPrototype* errorPrototype() const { return d()->errorPrototype; }
	NativeErrorPrototype* evalErrorPrototype() const { return d()->evalErrorPrototype; }
	NativeErrorPrototype* rangeErrorPrototype() const { return d()->rangeErrorPrototype; }
	NativeErrorPrototype* referenceErrorPrototype() const { return d()->referenceErrorPrototype; }
	NativeErrorPrototype* syntaxErrorPrototype() const { return d()->syntaxErrorPrototype; }
	NativeErrorPrototype* typeErrorPrototype() const { return d()->typeErrorPrototype; }
	NativeErrorPrototype* URIErrorPrototype() const { return d()->URIErrorPrototype; }

	void setPageGroupIdentifier(unsigned value) { d()->pageGroupIdentifier = value; }
	unsigned pageGroupIdentifier() const { return d()->pageGroupIdentifier; }

	void setTimeoutTime(unsigned timeoutTime) { d()->timeoutTime = timeoutTime; }
	void startTimeoutCheck();
	void stopTimeoutCheck();
	bool timedOut();

	Debugger* debugger() const { return d()->debugger; }
	void setDebugger(Debugger* debugger) { d()->debugger = debugger; }

	int recursion() { return d()->recursion; }
	void incRecursion() { ++d()->recursion; }
	void decRecursion() { --d()->recursion; }

	virtual void mark();

	virtual bool isGlobalObject() const { return true; }
	virtual JSGlobalObject* toGlobalObject(ExecState*) const;

	virtual ExecState* globalExec();

	virtual bool shouldInterruptScript() const { return true; }

	virtual bool allowsAccessFrom(const JSGlobalObject*) const { return true; }

	ActivationImp* pushActivation(ExecState*);
	void popActivation();
	void tearOffActivation(ExecState*, bool markAsRelic = false);

	virtual bool isDynamicScope() const;

	ExecStateStack& activeExecStates() const { return d()->activeExecStates; }

	HashSet<JSObject>& arrayVisitedElements() { if (!d()->arrayVisitedElements) d()->arrayVisitedElements.set(new HashSet<JSObject>); return *d()->arrayVisitedElements; }

	// Per-thread hash tables, cached on the global object for faster access.
	const PerThreadData* perThreadData() const { return &d()->perThreadData; }

	// Initialize and/or retrieve per-thread hash tables - use perThreadData() for faster access instead.
	static ThreadClassInfoHashTables* threadClassInfoHashTables();

	void* operator new(size_t);

	private:
	void init(JSObject* thisValue);

	JSGlobalObjectData* d() const { return static_cast<JSGlobalObjectData*>(JSVariableObject::d); }

	bool checkTimeout();
	void resetTimeoutCheck();

	void deleteActivationStack();
	void checkActivationCount();
	};

	inline bool JSGlobalObject::timedOut()
	{
	d()->tickCount++;

	if (d()->tickCount != d()->ticksUntilNextTimeoutCheck)
	return false;

	return checkTimeout();
	}

	inline ActivationImp* JSGlobalObject::pushActivation(ExecState* exec)
	{
	if (d()->activationCount == activationStackNodeSize) {
	ActivationStackNode* newNode = new ActivationStackNode;
	newNode->prev = d()->activations;
	d()->activations = newNode;
	d()->activationCount = 0;
	}

	StackActivation* stackEntry = &d()->activations->data[d()->activationCount++];
	stackEntry->activationStorage.init(exec);
	return &stackEntry->activationStorage;
	}

	inline void JSGlobalObject::checkActivationCount()
	{
	if (!d()->activationCount) {
	ActivationStackNode* prev = d()->activations->prev;
	ASSERT(prev);
	delete d()->activations;
	d()->activations = prev;
	d()->activationCount = activationStackNodeSize;
	}
	}

	inline void JSGlobalObject::popActivation()
	{
	checkActivationCount();
	d()->activations->data[--d()->activationCount].activationDataStorage.localStorage.shrink(0);
	}

	} // namespace KJS

	#endif // KJS_GlobalObject_h