/* AngelCode Scripting Library Copyright (c) 2003-2017 Andreas Jonsson This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution. The original version of this library can be located at: http://www.angelcode.com/angelscript/ Andreas Jonsson andreas@angelcode.com */ // // as_scriptengine.h // // The implementation of the script engine interface // #ifndef AS_SCRIPTENGINE_H #define AS_SCRIPTENGINE_H #include "as_config.h" #include "as_atomic.h" #include "as_scriptfunction.h" #include "as_array.h" #include "as_datatype.h" #include "as_objecttype.h" #include "as_module.h" #include "as_callfunc.h" #include "as_configgroup.h" #include "as_memory.h" #include "as_gc.h" #include "as_tokenizer.h" BEGIN_AS_NAMESPACE class asCBuilder; class asCContext; // TODO: import: Remove this when import is removed struct sBindInfo; class asCScriptEngine : public asIScriptEngine { //============================================================= // From asIScriptEngine //============================================================= public: // Memory management virtual int AddRef() const; virtual int Release() const; virtual int ShutDownAndRelease(); // Engine properties virtual int SetEngineProperty(asEEngineProp property, asPWORD value); virtual asPWORD GetEngineProperty(asEEngineProp property) const; // Compiler messages virtual int SetMessageCallback(const asSFuncPtr &callback, void *obj, asDWORD callConv); virtual int ClearMessageCallback(); virtual int WriteMessage(const char *section, int row, int col, asEMsgType type, const char *message); // JIT Compiler virtual int SetJITCompiler(asIJITCompiler *compiler); virtual asIJITCompiler *GetJITCompiler() const; // Global functions virtual int RegisterGlobalFunction(const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *auxiliary = 0); virtual asUINT GetGlobalFunctionCount() const; virtual asIScriptFunction *GetGlobalFunctionByIndex(asUINT index) const; virtual asIScriptFunction *GetGlobalFunctionByDecl(const char *declaration) const; // Global properties virtual int RegisterGlobalProperty(const char *declaration, void *pointer); virtual asUINT GetGlobalPropertyCount() const; 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; virtual int GetGlobalPropertyIndexByName(const char *name) const; virtual int GetGlobalPropertyIndexByDecl(const char *decl) const; // Type registration virtual int RegisterObjectType(const char *obj, int byteSize, asDWORD flags); virtual int RegisterObjectProperty(const char *obj, const char *declaration, int byteOffset, int compositeOffset = 0, bool isCompositeIndirect = false); virtual int RegisterObjectMethod(const char *obj, const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *auxiliary = 0, int compositeOffset = 0, bool isCompositeIndirect = false); virtual int RegisterObjectBehaviour(const char *obj, asEBehaviours behaviour, const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *auxiliary = 0, int compositeOffset = 0, bool isCompositeIndirect = false); virtual int RegisterInterface(const char *name); virtual int RegisterInterfaceMethod(const char *intf, const char *declaration); virtual asUINT GetObjectTypeCount() const; virtual asITypeInfo *GetObjectTypeByIndex(asUINT index) const; // String factory virtual int RegisterStringFactory(const char *datatype, asIStringFactory *factory); virtual int GetStringFactoryReturnTypeId(asDWORD *flags) const; // Default array type virtual int RegisterDefaultArrayType(const char *type); virtual int GetDefaultArrayTypeId() const; // Enums virtual int RegisterEnum(const char *type); virtual int RegisterEnumValue(const char *type, const char *name, int value); virtual asUINT GetEnumCount() const; virtual asITypeInfo *GetEnumByIndex(asUINT index) const; // Funcdefs virtual int RegisterFuncdef(const char *decl); virtual asUINT GetFuncdefCount() const; virtual asITypeInfo *GetFuncdefByIndex(asUINT index) const; // Typedefs // TODO: interface: Should perhaps rename this to Alias, since it doesn't really create a new type virtual int RegisterTypedef(const char *type, const char *decl); virtual asUINT GetTypedefCount() const; virtual asITypeInfo *GetTypedefByIndex(asUINT index) const; // Configuration groups virtual int BeginConfigGroup(const char *groupName); virtual int EndConfigGroup(); virtual int RemoveConfigGroup(const char *groupName); virtual asDWORD SetDefaultAccessMask(asDWORD defaultMask); virtual int SetDefaultNamespace(const char *nameSpace); virtual const char *GetDefaultNamespace() const; // Script modules virtual asIScriptModule *GetModule(const char *module, asEGMFlags flag); virtual int DiscardModule(const char *module); virtual asUINT GetModuleCount() const; virtual asIScriptModule *GetModuleByIndex(asUINT index) const; // Script functions virtual asIScriptFunction *GetFunctionById(int funcId) const; // Type identification virtual int GetTypeIdByDecl(const char *decl) const; virtual const char *GetTypeDeclaration(int typeId, bool includeNamespace = false) const; virtual int GetSizeOfPrimitiveType(int typeId) const; virtual asITypeInfo *GetTypeInfoById(int typeId) const; virtual asITypeInfo *GetTypeInfoByName(const char *name) const; virtual asITypeInfo *GetTypeInfoByDecl(const char *decl) const; // Script execution virtual asIScriptContext *CreateContext(); virtual void *CreateScriptObject(const asITypeInfo *type); virtual void *CreateScriptObjectCopy(void *obj, const asITypeInfo *type); virtual void *CreateUninitializedScriptObject(const asITypeInfo *type); virtual asIScriptFunction *CreateDelegate(asIScriptFunction *func, void *obj); virtual int AssignScriptObject(void *dstObj, void *srcObj, const asITypeInfo *type); virtual void ReleaseScriptObject(void *obj, const asITypeInfo *type); virtual void AddRefScriptObject(void *obj, const asITypeInfo *type); virtual int RefCastObject(void *obj, asITypeInfo *fromType, asITypeInfo *toType, void **newPtr, bool useOnlyImplicitCast = false); virtual asILockableSharedBool *GetWeakRefFlagOfScriptObject(void *obj, const asITypeInfo *type) const; // Context pooling virtual asIScriptContext *RequestContext(); virtual void ReturnContext(asIScriptContext *ctx); virtual int SetContextCallbacks(asREQUESTCONTEXTFUNC_t requestCtx, asRETURNCONTEXTFUNC_t returnCtx, void *param = 0); // String interpretation virtual asETokenClass ParseToken(const char *string, size_t stringLength = 0, asUINT *tokenLength = 0) const; // Garbage collection virtual int GarbageCollect(asDWORD flags = asGC_FULL_CYCLE, asUINT numIterations = 1); virtual void GetGCStatistics(asUINT *currentSize, asUINT *totalDestroyed, asUINT *totalDetected, asUINT *newObjects, asUINT *totalNewDestroyed) const; virtual int NotifyGarbageCollectorOfNewObject(void *obj, asITypeInfo *type); virtual int GetObjectInGC(asUINT idx, asUINT *seqNbr, void **obj = 0, asITypeInfo **type = 0); virtual void GCEnumCallback(void *reference); // User data virtual void *SetUserData(void *data, asPWORD type); virtual void *GetUserData(asPWORD type) const; virtual void SetEngineUserDataCleanupCallback(asCLEANENGINEFUNC_t callback, asPWORD type); virtual void SetModuleUserDataCleanupCallback(asCLEANMODULEFUNC_t callback, asPWORD type); virtual void SetContextUserDataCleanupCallback(asCLEANCONTEXTFUNC_t callback, asPWORD type); virtual void SetFunctionUserDataCleanupCallback(asCLEANFUNCTIONFUNC_t callback, asPWORD type); virtual void SetTypeInfoUserDataCleanupCallback(asCLEANTYPEINFOFUNC_t callback, asPWORD type); virtual void SetScriptObjectUserDataCleanupCallback(asCLEANSCRIPTOBJECTFUNC_t callback, asPWORD type); //=========================================================== // internal methods //=========================================================== public: asCScriptEngine(); virtual ~asCScriptEngine(); //protected: friend class asCBuilder; friend class asCCompiler; friend class asCContext; friend class asCDataType; friend class asCModule; friend class asCRestore; friend class asCByteCode; friend int PrepareSystemFunction(asCScriptFunction *func, asSSystemFunctionInterface *internal, asCScriptEngine *engine); int RegisterMethodToObjectType(asCObjectType *objectType, const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *auxiliary = 0, int compositeOffset = 0, bool isCompositeIndirect = false); int RegisterBehaviourToObjectType(asCObjectType *objectType, asEBehaviours behaviour, const char *decl, const asSFuncPtr &funcPointer, asDWORD callConv, void *auxiliary = 0, int compositeOffset = 0, bool isCompositeIndirect = false); int VerifyVarTypeNotInFunction(asCScriptFunction *func); void *CallAlloc(const asCObjectType *objType) const; void CallFree(void *obj) const; void *CallGlobalFunctionRetPtr(int func) const; void *CallGlobalFunctionRetPtr(int func, void *param1) const; void *CallGlobalFunctionRetPtr(asSSystemFunctionInterface *func, asCScriptFunction *desc) const; void *CallGlobalFunctionRetPtr(asSSystemFunctionInterface *i, asCScriptFunction *s, void *param1) const; void CallObjectMethod(void *obj, int func) const; void CallObjectMethod(void *obj, void *param, int func) const; void CallObjectMethod(void *obj, asSSystemFunctionInterface *func, asCScriptFunction *desc) const; void CallObjectMethod(void *obj, void *param, asSSystemFunctionInterface *func, asCScriptFunction *desc) const; bool CallObjectMethodRetBool(void *obj, int func) const; int CallObjectMethodRetInt(void *obj, int func) const; void *CallObjectMethodRetPtr(void *obj, int func) const; void *CallObjectMethodRetPtr(void *obj, int param1, asCScriptFunction *func) const; void CallGlobalFunction(void *param1, void *param2, asSSystemFunctionInterface *func, asCScriptFunction *desc) const; bool CallGlobalFunctionRetBool(void *param1, void *param2, asSSystemFunctionInterface *func, asCScriptFunction *desc) const; int CallScriptObjectMethod(void *obj, int func); void ConstructScriptObjectCopy(void *mem, void *obj, asCObjectType *type); void DeleteDiscardedModules(); void RemoveTemplateInstanceType(asCObjectType *t); asCConfigGroup *FindConfigGroupForFunction(int funcId) const; asCConfigGroup *FindConfigGroupForGlobalVar(int gvarId) const; asCConfigGroup *FindConfigGroupForTypeInfo(const asCTypeInfo *type) const; asCConfigGroup *FindConfigGroupForFuncDef(const asCFuncdefType *funcDef) const; int RequestBuild(); void BuildCompleted(); void PrepareEngine(); bool isPrepared; int CreateContext(asIScriptContext **context, bool isInternal); asCTypeInfo *GetRegisteredType(const asCString &name, asSNameSpace *ns) const; asCObjectType *GetListPatternType(int listPatternFuncId); void DestroyList(asBYTE *buffer, const asCObjectType *listPatternType); void DestroySubList(asBYTE *&buffer, asSListPatternNode *&patternNode); int AddBehaviourFunction(asCScriptFunction &func, asSSystemFunctionInterface &internal); asCString GetFunctionDeclaration(int funcId); asCScriptFunction *GetScriptFunction(int funcId) const; asCModule *GetModule(const char *name, bool create); asCModule *GetModuleFromFuncId(int funcId); int GetMethodIdByDecl(const asCObjectType *ot, const char *decl, asCModule *mod); int GetFactoryIdByDecl(const asCObjectType *ot, const char *decl); int GetNextScriptFunctionId(); void AddScriptFunction(asCScriptFunction *func); void RemoveScriptFunction(asCScriptFunction *func); void RemoveFuncdef(asCFuncdefType *func); int ConfigError(int err, const char *funcName, const char *arg1, const char *arg2); int GetTypeIdFromDataType(const asCDataType &dt) const; asCDataType GetDataTypeFromTypeId(int typeId) const; asCObjectType *GetObjectTypeFromTypeId(int typeId) const; void RemoveFromTypeIdMap(asCTypeInfo *type); bool IsTemplateType(const char *name) const; int SetTemplateRestrictions(asCObjectType *templateType, asCScriptFunction *func, const char *caller, const char *decl); asCObjectType *GetTemplateInstanceType(asCObjectType *templateType, asCArray &subTypes, asCModule *requestingModule); asCScriptFunction *GenerateTemplateFactoryStub(asCObjectType *templateType, asCObjectType *templateInstanceType, int origFactoryId); bool GenerateNewTemplateFunction(asCObjectType *templateType, asCObjectType *templateInstanceType, asCScriptFunction *templateFunc, asCScriptFunction **newFunc); asCFuncdefType *GenerateNewTemplateFuncdef(asCObjectType *templateType, asCObjectType *templateInstanceType, asCFuncdefType *templateFuncdef); asCDataType DetermineTypeForTemplate(const asCDataType &orig, asCObjectType *tmpl, asCObjectType *ot); bool RequireTypeReplacement(asCDataType &type, asCObjectType *templateType); asCModule *FindNewOwnerForSharedType(asCTypeInfo *type, asCModule *mod); asCModule *FindNewOwnerForSharedFunc(asCScriptFunction *func, asCModule *mod); asCFuncdefType *FindMatchingFuncdef(asCScriptFunction *func, asCModule *mod); // Global property management asCGlobalProperty *AllocateGlobalProperty(); void RemoveGlobalProperty(asCGlobalProperty *prop); int GetScriptSectionNameIndex(const char *name); // Namespace management asSNameSpace *AddNameSpace(const char *name); asSNameSpace *FindNameSpace(const char *name) const; asSNameSpace *GetParentNameSpace(asSNameSpace *ns) const; //=========================================================== // internal properties //=========================================================== asCMemoryMgr memoryMgr; asUINT initialContextStackSize; asCObjectType *defaultArrayObjectType; asCObjectType scriptTypeBehaviours; asCObjectType functionBehaviours; // Registered interface asCArray registeredObjTypes; // doesn't increase ref count asCArray registeredTypeDefs; // doesn't increase ref count asCArray registeredEnums; // doesn't increase ref count // TODO: memory savings: Since there can be only one property with the same name a simpler symbol table should be used for global props asCSymbolTable registeredGlobalProps; // increases ref count asCSymbolTable registeredGlobalFuncs; asCArray registeredFuncDefs; // doesn't increase ref count asCArray registeredTemplateTypes; // doesn't increase ref count asIStringFactory *stringFactory; asCDataType stringType; bool configFailed; // Stores all registered types asCMap allRegisteredTypes; // increases ref count // Dummy types used to name the subtypes in the template objects asCArray templateSubTypes; // Store information about template types // This list will contain all instances of templates, both registered specialized // types and those automacially instantiated from scripts asCArray templateInstanceTypes; // increases ref count // Store information about list patterns asCArray listPatternTypes; // increases ref count // Stores all global properties, both those registered by application, and those declared by scripts. // The id of a global property is the index in this array. asCArray globalProperties; // increases ref count asCArray freeGlobalPropertyIds; // This map is used to quickly find a property by its memory address // It is used principally during building, cleanup, and garbage detection for script functions asCMap varAddressMap; // doesn't increase ref count // Stores all functions, i.e. registered functions, script functions, class methods, behaviours, etc. asCArray scriptFunctions; // doesn't increase ref count asCArray freeScriptFunctionIds; asCArray signatureIds; // An array with all module imported functions asCArray importedFunctions; // doesn't increase ref count asCArray freeImportedFunctionIdxs; // Synchronized mutable asCAtomic refCount; // Synchronized with engineRWLock // This array holds all live script modules asCArray scriptModules; // Synchronized with engineRWLock // This is a pointer to the last module that was requested. It is used for performance // improvement, since it is common that the same module is accessed many times in a row asCModule *lastModule; // Synchronized with engineRWLock // This flag is true if a script is currently being compiled. It is used to prevent multiple // threads from requesting builds at the same time (without blocking) bool isBuilding; // Synchronized with engineRWLock // This array holds modules that have been discard (thus are no longer visible to the application) // but cannot yet be deleted due to having external references to some of the entities in them asCArray discardedModules; // This flag is set to true during compilations of scripts (or loading pre-compiled scripts) // to delay the validation of template types until the subtypes have been fully declared bool deferValidationOfTemplateTypes; // Tokenizer is instantiated once to share resources asCTokenizer tok; // Stores shared script declared types (classes, interfaces, enums) asCArray sharedScriptTypes; // increases ref count // This array stores the template instances types that have been automatically generated from template types asCArray generatedTemplateTypes; // Stores the funcdefs // TODO: redesign: Only shared funcdefs should be stored here // a funcdef becomes shared if all arguments and the return type are shared (or application registered) asCArray funcDefs; // doesn't increases ref count // Stores the names of the script sections for debugging purposes asCArray scriptSectionNames; // Type identifiers mutable int typeIdSeqNbr; mutable asCMap mapTypeIdToTypeInfo; // Garbage collector asCGarbageCollector gc; // Dynamic groups asCConfigGroup defaultGroup; asCArray configGroups; asCConfigGroup *currentGroup; asDWORD defaultAccessMask; asSNameSpace *defaultNamespace; // Message callback bool msgCallback; asSSystemFunctionInterface msgCallbackFunc; void *msgCallbackObj; struct preMessage_t { preMessage_t() { isSet = false; } bool isSet; asCString message; asCString scriptname; int r; int c; } preMessage; // JIt compilation asIJITCompiler *jitCompiler; // Namespaces // These are shared between all entities and are // only deleted once the engine is destroyed asCArray nameSpaces; // Callbacks for context pooling asREQUESTCONTEXTFUNC_t requestCtxFunc; asRETURNCONTEXTFUNC_t returnCtxFunc; void *ctxCallbackParam; // User data asCArray userData; struct SEngineClean { asPWORD type; asCLEANENGINEFUNC_t cleanFunc; }; asCArray cleanEngineFuncs; struct SModuleClean { asPWORD type; asCLEANMODULEFUNC_t cleanFunc; }; asCArray cleanModuleFuncs; struct SContextClean { asPWORD type; asCLEANCONTEXTFUNC_t cleanFunc; }; asCArray cleanContextFuncs; struct SFunctionClean { asPWORD type; asCLEANFUNCTIONFUNC_t cleanFunc; }; asCArray cleanFunctionFuncs; struct STypeInfoClean { asPWORD type; asCLEANTYPEINFOFUNC_t cleanFunc; }; asCArray cleanTypeInfoFuncs; struct SScriptObjClean { asPWORD type; asCLEANSCRIPTOBJECTFUNC_t cleanFunc; }; asCArray 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; bool allowUnicodeIdentifiers; int heredocTrimMode; asUINT maxNestedCalls; } 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