src/squirrel/squirrel/sqobject.h

   1 /*      see copyright notice in squirrel.h */
   2 #ifndef _SQOBJECT_H_
   3 #define _SQOBJECT_H_
   4
   5 #include "squtils.h"
   6
   7 #define SQ_CLOSURESTREAM_HEAD (('S'<<24)|('Q'<<16)|('I'<<8)|('R'))
   8 #define SQ_CLOSURESTREAM_PART (('P'<<24)|('A'<<16)|('R'<<8)|('T'))
   9 #define SQ_CLOSURESTREAM_TAIL (('T'<<24)|('A'<<16)|('I'<<8)|('L'))
  10
  11 struct SQSharedState;
  12
  13 enum SQMetaMethod{
  14         MT_ADD=0,
  15         MT_SUB=1,
  16         MT_MUL=2,
  17         MT_DIV=3,
  18         MT_UNM=4,
  19         MT_MODULO=5,
  20         MT_SET=6,
  21         MT_GET=7,
  22         MT_TYPEOF=8,
  23         MT_NEXTI=9,
  24         MT_CMP=10,
  25         MT_CALL=11,
  26         MT_CLONED=12,
  27         MT_NEWSLOT=13,
  28         MT_DELSLOT=14,
  29         MT_TOSTRING=15,
  30         MT_NEWMEMBER=16,
  31         MT_INHERITED=17,
  32         MT_LAST = 18
  33 };
  34
  35 #define MM_ADD          _SC("_add")
  36 #define MM_SUB          _SC("_sub")
  37 #define MM_MUL          _SC("_mul")
  38 #define MM_DIV          _SC("_div")
  39 #define MM_UNM          _SC("_unm")
  40 #define MM_MODULO       _SC("_modulo")
  41 #define MM_SET          _SC("_set")
  42 #define MM_GET          _SC("_get")
  43 #define MM_TYPEOF       _SC("_typeof")
  44 #define MM_NEXTI        _SC("_nexti")
  45 #define MM_CMP          _SC("_cmp")
  46 #define MM_CALL         _SC("_call")
  47 #define MM_CLONED       _SC("_cloned")
  48 #define MM_NEWSLOT      _SC("_newslot")
  49 #define MM_DELSLOT      _SC("_delslot")
  50 #define MM_TOSTRING     _SC("_tostring")
  51 #define MM_NEWMEMBER _SC("_newmember")
  52 #define MM_INHERITED _SC("_inherited")
  53
  54 #define MINPOWER2 4
  55
  56 struct SQRefCounted
  57 {
  58         SQRefCounted() { _uiRef = 0; _weakref = NULL; }
  59         virtual ~SQRefCounted();
  60         SQWeakRef *GetWeakRef(SQObjectType type);
  61         SQUnsignedInteger _uiRef;
  62         struct SQWeakRef *_weakref;
  63         virtual void Release()=0;
  64 };
  65
  66 struct SQWeakRef : SQRefCounted
  67 {
  68         void Release();
  69         SQObject _obj;
  70 };
  71
  72 #define _realval(o) (type((o)) != OT_WEAKREF?(SQObject)o:_weakref(o)->_obj)
  73
  74 struct SQObjectPtr;
  75
  76 #define __AddRef(type,unval) if(ISREFCOUNTED(type))     \
  77                 { \
  78                         unval.pRefCounted->_uiRef++; \
  79                 }
  80
  81 #define __Release(type,unval) if(ISREFCOUNTED(type) && ((--unval.pRefCounted->_uiRef)<=0))      \
  82                 {       \
  83                         unval.pRefCounted->Release();   \
  84                 }
  85
  86 #define __ObjRelease(obj) { \
  87         if((obj)) {     \
  88                 (obj)->_uiRef--; \
  89                 if((obj)->_uiRef == 0) \
  90                         (obj)->Release(); \
  91                 (obj) = NULL;   \
  92         } \
  93 }
  94
  95 #define __ObjAddRef(obj) { \
  96         (obj)->_uiRef++; \
  97 }
  98
  99 #define type(obj) ((obj)._type)
 100 #define is_delegable(t) (type(t)&SQOBJECT_DELEGABLE)
 101 #define raw_type(obj) _RAW_TYPE((obj)._type)
 102
 103 #define _integer(obj) ((obj)._unVal.nInteger)
 104 #define _float(obj) ((obj)._unVal.fFloat)
 105 #define _string(obj) ((obj)._unVal.pString)
 106 #define _table(obj) ((obj)._unVal.pTable)
 107 #define _array(obj) ((obj)._unVal.pArray)
 108 #define _closure(obj) ((obj)._unVal.pClosure)
 109 #define _generator(obj) ((obj)._unVal.pGenerator)
 110 #define _nativeclosure(obj) ((obj)._unVal.pNativeClosure)
 111 #define _userdata(obj) ((obj)._unVal.pUserData)
 112 #define _userpointer(obj) ((obj)._unVal.pUserPointer)
 113 #define _thread(obj) ((obj)._unVal.pThread)
 114 #define _funcproto(obj) ((obj)._unVal.pFunctionProto)
 115 #define _class(obj) ((obj)._unVal.pClass)
 116 #define _instance(obj) ((obj)._unVal.pInstance)
 117 #define _delegable(obj) ((SQDelegable *)(obj)._unVal.pDelegable)
 118 #define _weakref(obj) ((obj)._unVal.pWeakRef)
 119 #define _refcounted(obj) ((obj)._unVal.pRefCounted)
 120 #define _rawval(obj) ((obj)._unVal.pRefCounted)
 121
 122 #define _stringval(obj) (obj)._unVal.pString->_val
 123 #define _userdataval(obj) (obj)._unVal.pUserData->_val
 124
 125 #define tofloat(num) ((type(num)==OT_INTEGER)?(SQFloat)_integer(num):_float(num))
 126 #define tointeger(num) ((type(num)==OT_FLOAT)?(SQInteger)_float(num):_integer(num))
 127 /////////////////////////////////////////////////////////////////////////////////////
 128 /////////////////////////////////////////////////////////////////////////////////////
 129 struct SQObjectPtr : public SQObject
 130 {
 131         SQObjectPtr()
 132         {
 133                 _type=OT_NULL;
 134                 _unVal.pUserPointer=NULL;
 135         }
 136         SQObjectPtr(const SQObjectPtr &o)
 137         {
 138                 _type=o._type;
 139                 _unVal=o._unVal;
 140                 __AddRef(_type,_unVal);
 141         }
 142         SQObjectPtr(const SQObject &o)
 143         {
 144                 _type=o._type;
 145                 _unVal=o._unVal;
 146                 __AddRef(_type,_unVal);
 147         }
 148         SQObjectPtr(SQTable *pTable)
 149         {
 150                 _type=OT_TABLE;
 151                 _unVal.pTable=pTable;
 152                 assert(_unVal.pTable);
 153                 __AddRef(_type,_unVal);
 154         }
 155         SQObjectPtr(SQClass *pClass)
 156         {
 157                 _type=OT_CLASS;
 158                 _unVal.pClass=pClass;
 159                 assert(_unVal.pClass);
 160                 __AddRef(_type,_unVal);
 161         }
 162         SQObjectPtr(SQInstance *pInstance)
 163         {
 164                 _type=OT_INSTANCE;
 165                 _unVal.pInstance=pInstance;
 166                 assert(_unVal.pInstance);
 167                 __AddRef(_type,_unVal);
 168         }
 169         SQObjectPtr(SQArray *pArray)
 170         {
 171                 _type=OT_ARRAY;
 172                 _unVal.pArray=pArray;
 173                 assert(_unVal.pArray);
 174                 __AddRef(_type,_unVal);
 175         }
 176         SQObjectPtr(SQClosure *pClosure)
 177         {
 178                 _type=OT_CLOSURE;
 179                 _unVal.pClosure=pClosure;
 180                 assert(_unVal.pClosure);
 181                 __AddRef(_type,_unVal);
 182         }
 183         SQObjectPtr(SQGenerator *pGenerator)
 184         {
 185                 _type=OT_GENERATOR;
 186                 _unVal.pGenerator=pGenerator;
 187                 assert(_unVal.pGenerator);
 188                 __AddRef(_type,_unVal);
 189         }
 190         SQObjectPtr(SQNativeClosure *pNativeClosure)
 191         {
 192                 _type=OT_NATIVECLOSURE;
 193                 _unVal.pNativeClosure=pNativeClosure;
 194                 assert(_unVal.pNativeClosure);
 195                 __AddRef(_type,_unVal);
 196         }
 197         SQObjectPtr(SQString *pString)
 198         {
 199                 _type=OT_STRING;
 200                 _unVal.pString=pString;
 201                 assert(_unVal.pString);
 202                 __AddRef(_type,_unVal);
 203         }
 204         SQObjectPtr(SQUserData *pUserData)
 205         {
 206                 _type=OT_USERDATA;
 207                 _unVal.pUserData=pUserData;
 208                 assert(_unVal.pUserData);
 209                 __AddRef(_type,_unVal);
 210         }
 211         SQObjectPtr(SQVM *pThread)
 212         {
 213                 _type=OT_THREAD;
 214                 _unVal.pThread=pThread;
 215                 assert(_unVal.pThread);
 216                 __AddRef(_type,_unVal);
 217         }
 218         SQObjectPtr(SQWeakRef *pWeakRef)
 219         {
 220                 _type=OT_WEAKREF;
 221                 _unVal.pWeakRef=pWeakRef;
 222                 assert(_unVal.pWeakRef);
 223                 __AddRef(_type,_unVal);
 224         }
 225         SQObjectPtr(SQFunctionProto *pFunctionProto)
 226         {
 227                 _type=OT_FUNCPROTO;
 228                 _unVal.pFunctionProto=pFunctionProto;
 229                 assert(_unVal.pFunctionProto);
 230                 __AddRef(_type,_unVal);
 231         }
 232         SQObjectPtr(SQInteger nInteger)
 233         {
 234                 _unVal.pUserPointer=NULL;
 235                 _type=OT_INTEGER;
 236                 _unVal.nInteger=nInteger;
 237         }
 238         SQObjectPtr(SQFloat fFloat)
 239         {
 240                 _unVal.pUserPointer=NULL;
 241                 _type=OT_FLOAT;
 242                 _unVal.fFloat=fFloat;
 243         }
 244         SQObjectPtr(bool bBool)
 245         {
 246                 _unVal.pUserPointer=NULL;
 247                 _type = OT_BOOL;
 248                 _unVal.nInteger = bBool?1:0;
 249         }
 250         SQObjectPtr(SQUserPointer pUserPointer)
 251         {
 252                 _type=OT_USERPOINTER;
 253                 _unVal.pUserPointer=pUserPointer;
 254         }
 255         ~SQObjectPtr()
 256         {
 257                 __Release(_type,_unVal);
 258         }
 259         inline void Null()
 260         {
 261                 __Release(_type,_unVal);
 262                 _type=OT_NULL;
 263                 _unVal.pUserPointer=NULL;
 264         }
 265         inline SQObjectPtr& operator=(const SQObjectPtr& obj)
 266         {
 267                 SQObjectType tOldType;
 268                 SQObjectValue unOldVal;
 269                 tOldType=_type;
 270                 unOldVal=_unVal;
 271                 _unVal = obj._unVal;
 272                 _type = obj._type;
 273                 __AddRef(_type,_unVal);
 274                 __Release(tOldType,unOldVal);
 275                 return *this;
 276         }
 277         inline SQObjectPtr& operator=(const SQObject& obj)
 278         {
 279                 SQObjectType tOldType;
 280                 SQObjectValue unOldVal;
 281                 tOldType=_type;
 282                 unOldVal=_unVal;
 283                 _unVal = obj._unVal;
 284                 _type = obj._type;
 285                 __AddRef(_type,_unVal);
 286                 __Release(tOldType,unOldVal);
 287                 return *this;
 288         }
 289         private:
 290                 SQObjectPtr(const SQChar *){} //safety
 291 };
 292 /////////////////////////////////////////////////////////////////////////////////////
 293 #ifndef NO_GARBAGE_COLLECTOR
 294 #define MARK_FLAG 0x80000000
 295 struct SQCollectable : public SQRefCounted {
 296         SQCollectable *_next;
 297         SQCollectable *_prev;
 298         SQSharedState *_sharedstate;
 299         virtual void Release()=0;
 300         virtual void Mark(SQCollectable **chain)=0;
 301         void UnMark();
 302         virtual void Finalize()=0;
 303         static void AddToChain(SQCollectable **chain,SQCollectable *c);
 304         static void RemoveFromChain(SQCollectable **chain,SQCollectable *c);
 305 };
 306
 307
 308 #define ADD_TO_CHAIN(chain,obj) AddToChain(chain,obj)
 309 #define REMOVE_FROM_CHAIN(chain,obj) {if(!(_uiRef&MARK_FLAG))RemoveFromChain(chain,obj);}
 310 #define CHAINABLE_OBJ SQCollectable
 311 #define INIT_CHAIN() {_next=NULL;_prev=NULL;_sharedstate=ss;}
 312 #else
 313
 314 #define ADD_TO_CHAIN(chain,obj) ((void)0)
 315 #define REMOVE_FROM_CHAIN(chain,obj) ((void)0)
 316 #define CHAINABLE_OBJ SQRefCounted
 317 #define INIT_CHAIN() ((void)0)
 318 #endif
 319
 320 struct SQDelegable : public CHAINABLE_OBJ {
 321         bool SetDelegate(SQTable *m);
 322         virtual bool GetMetaMethod(SQVM *v,SQMetaMethod mm,SQObjectPtr &res);
 323         SQTable *_delegate;
 324 };
 325
 326 SQUnsignedInteger TranslateIndex(const SQObjectPtr &idx);
 327 typedef sqvector<SQObjectPtr> SQObjectPtrVec;
 328 typedef sqvector<SQInteger> SQIntVec;
 329
 330
 331 #endif //_SQOBJECT_H_