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Angelscript/angelscript/source/as_scriptengine.h

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/*
AngelCode Scripting Library
Copyright (c) 2003-2019 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);
virtual void ForwardGCEnumReferences(void *ref, asITypeInfo *type);
virtual void ForwardGCReleaseReferences(void *ref, asITypeInfo *type);
virtual void SetCircularRefDetectedCallback(asCIRCULARREFFUNC_t callback, void *param = 0);
// 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);
// Exception handling
virtual int SetTranslateAppExceptionCallback(asSFuncPtr callback, void *param, int callConv);
//===========================================================
// 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<asCDataType> &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);
int DetermineNameAndNamespace(const char *in_name, asSNameSpace *implicitNs, asCString &out_name, asSNameSpace *&out_ns) const;
// 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;
asCObjectType *defaultArrayObjectType;
asCObjectType scriptTypeBehaviours;
asCObjectType functionBehaviours;
// Registered interface
asCArray<asCObjectType *> registeredObjTypes; // doesn't increase ref count
asCArray<asCTypedefType *> registeredTypeDefs; // doesn't increase ref count
asCArray<asCEnumType *> 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<asCGlobalProperty> registeredGlobalProps; // increases ref count
asCSymbolTable<asCScriptFunction> registeredGlobalFuncs;
asCArray<asCFuncdefType *> registeredFuncDefs; // doesn't increase ref count
asCArray<asCObjectType *> registeredTemplateTypes; // doesn't increase ref count
asIStringFactory *stringFactory;
asCDataType stringType;
bool configFailed;
// Stores all registered types
asCMap<asSNameSpaceNamePair, asCTypeInfo*> allRegisteredTypes; // increases ref count
// Dummy types used to name the subtypes in the template objects
asCArray<asCTypeInfo *> 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<asCObjectType *> templateInstanceTypes; // increases ref count
// Store information about list patterns
asCArray<asCObjectType *> 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<asCGlobalProperty *> globalProperties; // increases ref count
asCArray<int> 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<void*, asCGlobalProperty*> varAddressMap; // doesn't increase ref count
// Stores all functions, i.e. registered functions, script functions, class methods, behaviours, etc.
asCArray<asCScriptFunction *> scriptFunctions; // doesn't increase ref count
asCArray<int> freeScriptFunctionIds;
asCArray<asCScriptFunction *> signatureIds;
// An array with all module imported functions
asCArray<sBindInfo *> importedFunctions; // doesn't increase ref count
asCArray<int> freeImportedFunctionIdxs;
// Synchronized
mutable asCAtomic refCount;
// Synchronized with engineRWLock
// This array holds all live script modules
asCArray<asCModule *> 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<asCModule *> 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<asCTypeInfo *> sharedScriptTypes; // increases ref count
// This array stores the template instances types that have been automatically generated from template types
asCArray<asCObjectType *> 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<asCFuncdefType *> funcDefs; // doesn't increases ref count
// Stores the names of the script sections for debugging purposes
asCArray<asCString *> scriptSectionNames;
// Type identifiers
mutable int typeIdSeqNbr;
mutable asCMap<int, asCTypeInfo*> mapTypeIdToTypeInfo;
// Garbage collector
asCGarbageCollector gc;
// Dynamic groups
asCConfigGroup defaultGroup;
asCArray<asCConfigGroup*> 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<asSNameSpace*> nameSpaces;
// 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 STypeInfoClean { asPWORD type; asCLEANTYPEINFOFUNC_t cleanFunc; };
asCArray<STypeInfoClean> cleanTypeInfoFuncs;
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;
asUINT initContextStackSize;
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;
asUINT genericCallMode;
asUINT initCallStackSize;
asUINT maxCallStackSize;
} ep;
// Callbacks
#ifndef AS_NO_EXCEPTIONS
bool translateExceptionCallback;
asSSystemFunctionInterface translateExceptionCallbackFunc;
void * translateExceptionCallbackObj;
#endif
// 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
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