519 lines
23 KiB
C++
519 lines
23 KiB
C++
/*
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AngelCode Scripting Library
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Copyright (c) 2003-2015 Andreas Jonsson
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you
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must not claim that you wrote the original software. If you use
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this software in a product, an acknowledgment in the product
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documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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The original version of this library can be located at:
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http://www.angelcode.com/angelscript/
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Andreas Jonsson
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andreas@angelcode.com
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*/
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//
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// as_scriptengine.h
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//
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// The implementation of the script engine interface
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//
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#ifndef AS_SCRIPTENGINE_H
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#define AS_SCRIPTENGINE_H
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#include "as_config.h"
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#include "as_atomic.h"
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#include "as_scriptfunction.h"
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#include "as_array.h"
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#include "as_datatype.h"
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#include "as_objecttype.h"
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#include "as_module.h"
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#include "as_callfunc.h"
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#include "as_configgroup.h"
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#include "as_memory.h"
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#include "as_gc.h"
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#include "as_tokenizer.h"
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BEGIN_AS_NAMESPACE
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class asCBuilder;
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class asCContext;
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// TODO: import: Remove this when import is removed
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struct sBindInfo;
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class asCScriptEngine : public asIScriptEngine
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{
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//=============================================================
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// From asIScriptEngine
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//=============================================================
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public:
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// Memory management
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virtual int AddRef() const;
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virtual int Release() const;
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virtual int ShutDownAndRelease();
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// Engine properties
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virtual int SetEngineProperty(asEEngineProp property, asPWORD value);
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virtual asPWORD GetEngineProperty(asEEngineProp property) const;
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// Compiler messages
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virtual int SetMessageCallback(const asSFuncPtr &callback, void *obj, asDWORD callConv);
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virtual int ClearMessageCallback();
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virtual int WriteMessage(const char *section, int row, int col, asEMsgType type, const char *message);
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// JIT Compiler
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virtual int SetJITCompiler(asIJITCompiler *compiler);
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virtual asIJITCompiler *GetJITCompiler() const;
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// Global functions
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virtual int RegisterGlobalFunction(const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *objForThiscall = 0);
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virtual asUINT GetGlobalFunctionCount() const;
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virtual asIScriptFunction *GetGlobalFunctionByIndex(asUINT index) const;
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virtual asIScriptFunction *GetGlobalFunctionByDecl(const char *declaration) const;
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// Global properties
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virtual int RegisterGlobalProperty(const char *declaration, void *pointer);
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virtual asUINT GetGlobalPropertyCount() const;
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virtual int GetGlobalPropertyByIndex(asUINT index, const char **name, const char **nameSpace = 0, int *typeId = 0, bool *isConst = 0, const char **configGroup = 0, void **pointer = 0, asDWORD *accessMask = 0) const;
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virtual int GetGlobalPropertyIndexByName(const char *name) const;
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virtual int GetGlobalPropertyIndexByDecl(const char *decl) const;
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// Type registration
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virtual int RegisterObjectType(const char *obj, int byteSize, asDWORD flags);
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virtual int RegisterObjectProperty(const char *obj, const char *declaration, int byteOffset);
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virtual int RegisterObjectMethod(const char *obj, const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *objForThiscall = 0);
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virtual int RegisterObjectBehaviour(const char *obj, asEBehaviours behaviour, const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *objForThiscall = 0);
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virtual int RegisterInterface(const char *name);
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virtual int RegisterInterfaceMethod(const char *intf, const char *declaration);
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virtual asUINT GetObjectTypeCount() const;
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virtual asIObjectType *GetObjectTypeByIndex(asUINT index) const;
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virtual asIObjectType *GetObjectTypeByName(const char *name) const;
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virtual asIObjectType *GetObjectTypeByDecl(const char *decl) const;
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// String factory
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virtual int RegisterStringFactory(const char *datatype, const asSFuncPtr &factoryFunc, asDWORD callConv, void *objForThiscall = 0);
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virtual int GetStringFactoryReturnTypeId(asDWORD *flags) const;
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// Default array type
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virtual int RegisterDefaultArrayType(const char *type);
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virtual int GetDefaultArrayTypeId() const;
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// Enums
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virtual int RegisterEnum(const char *type);
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virtual int RegisterEnumValue(const char *type, const char *name, int value);
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virtual asUINT GetEnumCount() const;
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virtual const char *GetEnumByIndex(asUINT index, int *enumTypeId, const char **nameSpace, const char **configGroup = 0, asDWORD *accessMask = 0) const;
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virtual int GetEnumValueCount(int enumTypeId) const;
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virtual const char *GetEnumValueByIndex(int enumTypeId, asUINT index, int *outValue) const;
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// Funcdefs
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virtual int RegisterFuncdef(const char *decl);
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virtual asUINT GetFuncdefCount() const;
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virtual asIScriptFunction *GetFuncdefByIndex(asUINT index) const;
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// Typedefs
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// TODO: interface: Should perhaps rename this to Alias, since it doesn't really create a new type
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virtual int RegisterTypedef(const char *type, const char *decl);
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virtual asUINT GetTypedefCount() const;
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virtual const char *GetTypedefByIndex(asUINT index, int *typeId, const char **nameSpace, const char **configGroup = 0, asDWORD *accessMask = 0) const;
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// Configuration groups
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virtual int BeginConfigGroup(const char *groupName);
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virtual int EndConfigGroup();
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virtual int RemoveConfigGroup(const char *groupName);
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virtual asDWORD SetDefaultAccessMask(asDWORD defaultMask);
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virtual int SetDefaultNamespace(const char *nameSpace);
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virtual const char *GetDefaultNamespace() const;
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// Script modules
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virtual asIScriptModule *GetModule(const char *module, asEGMFlags flag);
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virtual int DiscardModule(const char *module);
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virtual asUINT GetModuleCount() const;
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virtual asIScriptModule *GetModuleByIndex(asUINT index) const;
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// Script functions
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virtual asIScriptFunction *GetFunctionById(int funcId) const;
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virtual asIScriptFunction *GetFuncDefFromTypeId(int typeId) const;
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// Type identification
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virtual asIObjectType *GetObjectTypeById(int typeId) const;
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virtual int GetTypeIdByDecl(const char *decl) const;
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virtual const char *GetTypeDeclaration(int typeId, bool includeNamespace = false) const;
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virtual int GetSizeOfPrimitiveType(int typeId) const;
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// Script execution
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virtual asIScriptContext *CreateContext();
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virtual void *CreateScriptObject(const asIObjectType *type);
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virtual void *CreateScriptObjectCopy(void *obj, const asIObjectType *type);
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virtual void *CreateUninitializedScriptObject(const asIObjectType *type);
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virtual asIScriptFunction *CreateDelegate(asIScriptFunction *func, void *obj);
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virtual int AssignScriptObject(void *dstObj, void *srcObj, const asIObjectType *type);
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virtual void ReleaseScriptObject(void *obj, const asIObjectType *type);
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virtual void AddRefScriptObject(void *obj, const asIObjectType *type);
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virtual int RefCastObject(void *obj, asIObjectType *fromType, asIObjectType *toType, void **newPtr, bool useOnlyImplicitCast = false);
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#ifdef AS_DEPRECATED
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// Deprecated since 2.30.0, 2014-11-04
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virtual bool IsHandleCompatibleWithObject(void *obj, int objTypeId, int handleTypeId) const;
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#endif
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virtual asILockableSharedBool *GetWeakRefFlagOfScriptObject(void *obj, const asIObjectType *type) const;
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// Context pooling
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virtual asIScriptContext *RequestContext();
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virtual void ReturnContext(asIScriptContext *ctx);
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virtual int SetContextCallbacks(asREQUESTCONTEXTFUNC_t requestCtx, asRETURNCONTEXTFUNC_t returnCtx, void *param = 0);
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// String interpretation
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virtual asETokenClass ParseToken(const char *string, size_t stringLength = 0, asUINT *tokenLength = 0) const;
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// Garbage collection
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virtual int GarbageCollect(asDWORD flags = asGC_FULL_CYCLE, asUINT numIterations = 1);
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virtual void GetGCStatistics(asUINT *currentSize, asUINT *totalDestroyed, asUINT *totalDetected, asUINT *newObjects, asUINT *totalNewDestroyed) const;
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virtual int NotifyGarbageCollectorOfNewObject(void *obj, asIObjectType *type);
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virtual int GetObjectInGC(asUINT idx, asUINT *seqNbr, void **obj = 0, asIObjectType **type = 0);
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virtual void GCEnumCallback(void *reference);
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// User data
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virtual void *SetUserData(void *data, asPWORD type);
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virtual void *GetUserData(asPWORD type) const;
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virtual void SetEngineUserDataCleanupCallback(asCLEANENGINEFUNC_t callback, asPWORD type);
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virtual void SetModuleUserDataCleanupCallback(asCLEANMODULEFUNC_t callback, asPWORD type);
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virtual void SetContextUserDataCleanupCallback(asCLEANCONTEXTFUNC_t callback, asPWORD type);
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virtual void SetFunctionUserDataCleanupCallback(asCLEANFUNCTIONFUNC_t callback, asPWORD type);
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virtual void SetObjectTypeUserDataCleanupCallback(asCLEANOBJECTTYPEFUNC_t callback, asPWORD type);
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virtual void SetScriptObjectUserDataCleanupCallback(asCLEANSCRIPTOBJECTFUNC_t callback, asPWORD type);
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//===========================================================
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// internal methods
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//===========================================================
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public:
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asCScriptEngine();
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virtual ~asCScriptEngine();
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//protected:
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friend class asCBuilder;
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friend class asCCompiler;
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friend class asCContext;
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friend class asCDataType;
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friend class asCModule;
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friend class asCRestore;
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friend class asCByteCode;
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friend int PrepareSystemFunction(asCScriptFunction *func, asSSystemFunctionInterface *internal, asCScriptEngine *engine);
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int RegisterMethodToObjectType(asCObjectType *objectType, const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *objForThiscall = 0);
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int RegisterBehaviourToObjectType(asCObjectType *objectType, asEBehaviours behaviour, const char *decl, const asSFuncPtr &funcPointer, asDWORD callConv, void *objForThiscall);
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int VerifyVarTypeNotInFunction(asCScriptFunction *func);
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void *CallAlloc(const asCObjectType *objType) const;
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void CallFree(void *obj) const;
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void *CallGlobalFunctionRetPtr(int func) const;
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void *CallGlobalFunctionRetPtr(int func, void *param1) const;
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void *CallGlobalFunctionRetPtr(asSSystemFunctionInterface *func, asCScriptFunction *desc) const;
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void *CallGlobalFunctionRetPtr(asSSystemFunctionInterface *i, asCScriptFunction *s, void *param1) const;
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void CallObjectMethod(void *obj, int func) const;
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void CallObjectMethod(void *obj, void *param, int func) const;
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void CallObjectMethod(void *obj, asSSystemFunctionInterface *func, asCScriptFunction *desc) const;
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void CallObjectMethod(void *obj, void *param, asSSystemFunctionInterface *func, asCScriptFunction *desc) const;
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bool CallObjectMethodRetBool(void *obj, int func) const;
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int CallObjectMethodRetInt(void *obj, int func) const;
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void *CallObjectMethodRetPtr(void *obj, int func) const;
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void CallGlobalFunction(void *param1, void *param2, asSSystemFunctionInterface *func, asCScriptFunction *desc) const;
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bool CallGlobalFunctionRetBool(void *param1, void *param2, asSSystemFunctionInterface *func, asCScriptFunction *desc) const;
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void ConstructScriptObjectCopy(void *mem, void *obj, asCObjectType *type);
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void DeleteDiscardedModules();
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void RemoveTemplateInstanceType(asCObjectType *t);
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void RemoveTypeAndRelatedFromList(asCMap<asCObjectType*,char> &types, asCObjectType *ot);
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asCConfigGroup *FindConfigGroupForFunction(int funcId) const;
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asCConfigGroup *FindConfigGroupForGlobalVar(int gvarId) const;
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asCConfigGroup *FindConfigGroupForObjectType(const asCObjectType *type) const;
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asCConfigGroup *FindConfigGroupForFuncDef(const asCScriptFunction *funcDef) const;
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int RequestBuild();
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void BuildCompleted();
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void PrepareEngine();
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bool isPrepared;
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int CreateContext(asIScriptContext **context, bool isInternal);
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asCObjectType *GetRegisteredObjectType(const asCString &name, asSNameSpace *ns) const;
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asCObjectType *GetListPatternType(int listPatternFuncId);
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void DestroyList(asBYTE *buffer, const asCObjectType *listPatternType);
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void DestroySubList(asBYTE *&buffer, asSListPatternNode *&patternNode);
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int AddBehaviourFunction(asCScriptFunction &func, asSSystemFunctionInterface &internal);
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asCString GetFunctionDeclaration(int funcId);
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asCScriptFunction *GetScriptFunction(int funcId) const;
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asCModule *GetModule(const char *name, bool create);
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asCModule *GetModuleFromFuncId(int funcId);
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int GetMethodIdByDecl(const asCObjectType *ot, const char *decl, asCModule *mod);
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int GetFactoryIdByDecl(const asCObjectType *ot, const char *decl);
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int GetNextScriptFunctionId();
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void AddScriptFunction(asCScriptFunction *func);
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void RemoveScriptFunction(asCScriptFunction *func);
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void RemoveFuncdef(asCScriptFunction *func);
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int ConfigError(int err, const char *funcName, const char *arg1, const char *arg2);
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int GetTypeIdFromDataType(const asCDataType &dt) const;
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asCDataType GetDataTypeFromTypeId(int typeId) const;
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asCObjectType *GetObjectTypeFromTypeId(int typeId) const;
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void RemoveFromTypeIdMap(asCObjectType *type);
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bool IsTemplateType(const char *name) const;
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asCObjectType *GetTemplateInstanceType(asCObjectType *templateType, asCArray<asCDataType> &subTypes, asCModule *requestingModule);
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asCScriptFunction *GenerateTemplateFactoryStub(asCObjectType *templateType, asCObjectType *templateInstanceType, int origFactoryId);
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bool GenerateNewTemplateFunction(asCObjectType *templateType, asCObjectType *templateInstanceType, asCScriptFunction *templateFunc, asCScriptFunction **newFunc);
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asCDataType DetermineTypeForTemplate(const asCDataType &orig, asCObjectType *tmpl, asCObjectType *ot);
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bool RequireTypeReplacement(asCDataType &type, asCObjectType *templateType);
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asCModule *FindNewOwnerForSharedType(asCObjectType *type, asCModule *mod);
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asCModule *FindNewOwnerForSharedFunc(asCScriptFunction *func, asCModule *mod);
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// String constants
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// TODO: Must free unused string constants, thus the ref count for each must be tracked
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int AddConstantString(const char *str, size_t length);
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const asCString &GetConstantString(int id);
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// Global property management
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asCGlobalProperty *AllocateGlobalProperty();
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void RemoveGlobalProperty(asCGlobalProperty *prop);
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int GetScriptSectionNameIndex(const char *name);
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// Namespace management
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asSNameSpace *AddNameSpace(const char *name);
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asSNameSpace *FindNameSpace(const char *name) const;
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asSNameSpace *GetParentNameSpace(asSNameSpace *ns) const;
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//===========================================================
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// internal properties
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//===========================================================
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asCMemoryMgr memoryMgr;
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asUINT initialContextStackSize;
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asCObjectType *defaultArrayObjectType;
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asCObjectType scriptTypeBehaviours;
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asCObjectType functionBehaviours;
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// Registered interface
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asCArray<asCObjectType *> registeredObjTypes;
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asCArray<asCObjectType *> registeredTypeDefs;
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asCArray<asCObjectType *> registeredEnums;
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asCSymbolTable<asCGlobalProperty> registeredGlobalProps; // increases ref count // TODO: memory savings: Since there can be only one property with the same name a simpler symbol table should be used
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asCSymbolTable<asCScriptFunction> registeredGlobalFuncs;
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asCArray<asCScriptFunction *> registeredFuncDefs;
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asCArray<asCObjectType *> registeredTemplateTypes;
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asCScriptFunction *stringFactory;
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bool configFailed;
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// Stores all registered types except funcdefs
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asCMap<asSNameSpaceNamePair, asCObjectType*> allRegisteredTypes; // increases ref count
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// Dummy types used to name the subtypes in the template objects
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asCArray<asCObjectType *> templateSubTypes;
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// Store information about template types
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// This list will contain all instances of templates, both registered specialized
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// types and those automacially instantiated from scripts
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asCArray<asCObjectType *> templateInstanceTypes; // increases ref count
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// Store information about list patterns
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asCArray<asCObjectType *> listPatternTypes; // increases ref count
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// Stores all global properties, both those registered by application, and those declared by scripts.
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// The id of a global property is the index in this array.
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asCArray<asCGlobalProperty *> globalProperties; // increases ref count
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asCArray<int> freeGlobalPropertyIds;
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// This map is used to quickly find a property by its memory address
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// It is used principally during building, cleanup, and garbage detection for script functions
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asCMap<void*, asCGlobalProperty*> varAddressMap; // doesn't increase ref count
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// Stores all functions, i.e. registered functions, script functions, class methods, behaviours, etc.
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asCArray<asCScriptFunction *> scriptFunctions; // doesn't increase ref count
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asCArray<int> freeScriptFunctionIds;
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asCArray<asCScriptFunction *> signatureIds;
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// An array with all module imported functions
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asCArray<sBindInfo *> importedFunctions; // doesn't increase ref count
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asCArray<int> freeImportedFunctionIdxs;
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// Synchronized
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mutable asCAtomic refCount;
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// Synchronized with engineRWLock
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// This array holds all live script modules
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asCArray<asCModule *> scriptModules;
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// Synchronized with engineRWLock
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// This is a pointer to the last module that was requested. It is used for performance
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// improvement, since it is common that the same module is accessed many times in a row
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asCModule *lastModule;
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// Synchronized with engineRWLock
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// This flag is true if a script is currently being compiled. It is used to prevent multiple
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// threads from requesting builds at the same time (without blocking)
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bool isBuilding;
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// Synchronized with engineRWLock
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// This array holds modules that have been discard (thus are no longer visible to the application)
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// but cannot yet be deleted due to having external references to some of the entities in them
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asCArray<asCModule *> discardedModules;
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// This flag is set to true during compilations of scripts (or loading pre-compiled scripts)
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// to delay the validation of template types until the subtypes have been fully declared
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bool deferValidationOfTemplateTypes;
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// Tokenizer is instantiated once to share resources
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asCTokenizer tok;
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// Stores shared script declared types (classes, interfaces, enums)
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asCArray<asCObjectType *> sharedScriptTypes; // increases ref count
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// This array stores the template instances types that have been automatically generated from template types
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asCArray<asCObjectType *> generatedTemplateTypes;
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// Stores the funcdefs
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// TODO: 2.30.0: redesign: Only shared funcdefs should be stored here
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// a funcdef becomes shared if all arguments and the return type are shared (or application registered)
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asCArray<asCScriptFunction *> funcDefs; // doesn't increase ref count
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// Stores the names of the script sections for debugging purposes
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asCArray<asCString *> scriptSectionNames;
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// Type identifiers
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mutable int typeIdSeqNbr;
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mutable asCMap<int, asCDataType*> mapTypeIdToDataType;
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// Garbage collector
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asCGarbageCollector gc;
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// Dynamic groups
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asCConfigGroup defaultGroup;
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asCArray<asCConfigGroup*> configGroups;
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asCConfigGroup *currentGroup;
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asDWORD defaultAccessMask;
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asSNameSpace *defaultNamespace;
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// Message callback
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bool msgCallback;
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asSSystemFunctionInterface msgCallbackFunc;
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void *msgCallbackObj;
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struct preMessage_t
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{
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preMessage_t() { isSet = false; }
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bool isSet;
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asCString message;
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asCString scriptname;
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int r;
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int c;
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} preMessage;
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// JIt compilation
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asIJITCompiler *jitCompiler;
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|
|
|
// Namespaces
|
|
// These are shared between all entities and are
|
|
// only deleted once the engine is destroyed
|
|
asCArray<asSNameSpace*> nameSpaces;
|
|
|
|
// String constants
|
|
// These are shared between all scripts and are
|
|
// only deleted once the engine is destroyed
|
|
asCArray<asCString*> stringConstants;
|
|
asCMap<asCStringPointer, int> stringToIdMap;
|
|
|
|
// Callbacks for context pooling
|
|
asREQUESTCONTEXTFUNC_t requestCtxFunc;
|
|
asRETURNCONTEXTFUNC_t returnCtxFunc;
|
|
void *ctxCallbackParam;
|
|
|
|
// User data
|
|
asCArray<asPWORD> userData;
|
|
|
|
struct SEngineClean { asPWORD type; asCLEANENGINEFUNC_t cleanFunc; };
|
|
asCArray<SEngineClean> cleanEngineFuncs;
|
|
struct SModuleClean { asPWORD type; asCLEANMODULEFUNC_t cleanFunc; };
|
|
asCArray<SModuleClean> cleanModuleFuncs;
|
|
struct SContextClean { asPWORD type; asCLEANCONTEXTFUNC_t cleanFunc; };
|
|
asCArray<SContextClean> cleanContextFuncs;
|
|
struct SFunctionClean { asPWORD type; asCLEANFUNCTIONFUNC_t cleanFunc; };
|
|
asCArray<SFunctionClean> cleanFunctionFuncs;
|
|
struct SObjTypeClean { asPWORD type; asCLEANOBJECTTYPEFUNC_t cleanFunc; };
|
|
asCArray<SObjTypeClean> cleanObjectTypeFuncs;
|
|
struct SScriptObjClean { asPWORD type; asCLEANSCRIPTOBJECTFUNC_t cleanFunc; };
|
|
asCArray<SScriptObjClean> cleanScriptObjectFuncs;
|
|
|
|
// Synchronization for threads
|
|
DECLAREREADWRITELOCK(mutable engineRWLock)
|
|
|
|
// Engine properties
|
|
struct
|
|
{
|
|
bool allowUnsafeReferences;
|
|
bool optimizeByteCode;
|
|
bool copyScriptSections;
|
|
asUINT maximumContextStackSize;
|
|
bool useCharacterLiterals;
|
|
bool allowMultilineStrings;
|
|
bool allowImplicitHandleTypes;
|
|
bool buildWithoutLineCues;
|
|
bool initGlobalVarsAfterBuild;
|
|
bool requireEnumScope;
|
|
int scanner;
|
|
bool includeJitInstructions;
|
|
int stringEncoding;
|
|
int propertyAccessorMode;
|
|
bool expandDefaultArrayToTemplate;
|
|
bool autoGarbageCollect;
|
|
bool disallowGlobalVars;
|
|
bool alwaysImplDefaultConstruct;
|
|
int compilerWarnings;
|
|
bool disallowValueAssignForRefType;
|
|
// TODO: 3.0.0: Remove the alterSyntaxNamedArgs
|
|
int alterSyntaxNamedArgs;
|
|
bool disableIntegerDivision;
|
|
bool disallowEmptyListElements;
|
|
// TODO: 3.0.0: Remove the privatePropAsProtected
|
|
bool privatePropAsProtected;
|
|
} ep;
|
|
|
|
// This flag is to allow a quicker shutdown when releasing the engine
|
|
bool shuttingDown;
|
|
|
|
// This flag is set when the engine's destructor is called, this is to
|
|
// avoid recursive calls if an object happens to increment/decrement
|
|
// the ref counter during shutdown
|
|
bool inDestructor;
|
|
};
|
|
|
|
END_AS_NAMESPACE
|
|
|
|
#endif
|