external/squirrel/squirrel/sqclass.h

   1 /*      see copyright notice in squirrel.h */\r
   2 #ifndef _SQCLASS_H_\r
   3 #define _SQCLASS_H_\r
   4 \r
   5 struct SQInstance;\r
   6 \r
   7 struct SQClassMember {\r
   8         SQObjectPtr val;\r
   9         SQObjectPtr attrs;\r
  10 };\r
  11 \r
  12 typedef sqvector<SQClassMember> SQClassMemberVec;\r
  13 \r
  14 #define MEMBER_TYPE_METHOD 0x01000000\r
  15 #define MEMBER_TYPE_FIELD 0x02000000\r
  16 \r
  17 #define _ismethod(o) (_integer(o)&MEMBER_TYPE_METHOD)\r
  18 #define _isfield(o) (_integer(o)&MEMBER_TYPE_FIELD)\r
  19 #define _make_method_idx(i) ((SQInteger)(MEMBER_TYPE_METHOD|i))\r
  20 #define _make_field_idx(i) ((SQInteger)(MEMBER_TYPE_FIELD|i))\r
  21 #define _member_type(o) (_integer(o)&0xFF000000)\r
  22 #define _member_idx(o) (_integer(o)&0x00FFFFFF)\r
  23 \r
  24 struct SQClass : public CHAINABLE_OBJ\r
  25 {\r
  26         SQClass(SQSharedState *ss,SQClass *base);\r
  27 public:\r
  28         static SQClass* Create(SQSharedState *ss,SQClass *base) {\r
  29                 SQClass *newclass = (SQClass *)SQ_MALLOC(sizeof(SQClass));\r
  30                 new (newclass) SQClass(ss, base);\r
  31                 return newclass;\r
  32         }\r
  33         ~SQClass();\r
  34         bool NewSlot(SQSharedState *ss, const SQObjectPtr &key,const SQObjectPtr &val,bool bstatic);\r
  35         bool Get(const SQObjectPtr &key,SQObjectPtr &val) {\r
  36                 if(_members->Get(key,val)) {\r
  37                         if(_isfield(val)) {\r
  38                                 SQObjectPtr &o = _defaultvalues[_member_idx(val)].val;\r
  39                                 val = _realval(o);\r
  40                         }\r
  41                         else {\r
  42                                 val = _methods[_member_idx(val)].val;\r
  43                         }\r
  44                         return true;\r
  45                 }\r
  46                 return false;\r
  47         }\r
  48         bool GetConstructor(SQObjectPtr &ctor)\r
  49         {\r
  50                 if(_constructoridx != -1) {\r
  51                         ctor = _methods[_constructoridx].val;\r
  52                         return true;\r
  53                 }\r
  54                 return false;\r
  55         }\r
  56         bool SetAttributes(const SQObjectPtr &key,const SQObjectPtr &val);\r
  57         bool GetAttributes(const SQObjectPtr &key,SQObjectPtr &outval);\r
  58         void Lock() { _locked = true; if(_base) _base->Lock(); }\r
  59         void Release() { \r
  60                 if (_hook) { _hook(_typetag,0);}\r
  61                 sq_delete(this, SQClass);       \r
  62         }\r
  63         void Finalize();\r
  64 #ifndef NO_GARBAGE_COLLECTOR\r
  65         void Mark(SQCollectable ** );\r
  66         SQObjectType GetType() {return OT_CLASS;}\r
  67 #endif\r
  68         SQInteger Next(const SQObjectPtr &refpos, SQObjectPtr &outkey, SQObjectPtr &outval);\r
  69         SQInstance *CreateInstance();\r
  70         SQTable *_members;\r
  71         SQClass *_base;\r
  72         SQClassMemberVec _defaultvalues;\r
  73         SQClassMemberVec _methods;\r
  74         SQObjectPtr _metamethods[MT_LAST];\r
  75         SQObjectPtr _attributes;\r
  76         SQUserPointer _typetag;\r
  77         SQRELEASEHOOK _hook;\r
  78         bool _locked;\r
  79         SQInteger _constructoridx;\r
  80         SQInteger _udsize;\r
  81 };\r
  82 \r
  83 #define calcinstancesize(_theclass_) \\r
  84         (_theclass_->_udsize + sq_aligning(sizeof(SQInstance) +  (sizeof(SQObjectPtr)*(_theclass_->_defaultvalues.size()>0?_theclass_->_defaultvalues.size()-1:0))))\r
  85 \r
  86 struct SQInstance : public SQDelegable \r
  87 {\r
  88         void Init(SQSharedState *ss);\r
  89         SQInstance(SQSharedState *ss, SQClass *c, SQInteger memsize);\r
  90         SQInstance(SQSharedState *ss, SQInstance *c, SQInteger memsize);\r
  91 public:\r
  92         static SQInstance* Create(SQSharedState *ss,SQClass *theclass) {\r
  93                 \r
  94                 SQInteger size = calcinstancesize(theclass);\r
  95                 SQInstance *newinst = (SQInstance *)SQ_MALLOC(size);\r
  96                 new (newinst) SQInstance(ss, theclass,size);\r
  97                 if(theclass->_udsize) {\r
  98                         newinst->_userpointer = ((unsigned char *)newinst) + (size - theclass->_udsize);\r
  99                 }\r
 100                 return newinst;\r
 101         }\r
 102         SQInstance *Clone(SQSharedState *ss)\r
 103         {\r
 104                 SQInteger size = calcinstancesize(_class);\r
 105                 SQInstance *newinst = (SQInstance *)SQ_MALLOC(size);\r
 106                 new (newinst) SQInstance(ss, this,size);\r
 107                 if(_class->_udsize) {\r
 108                         newinst->_userpointer = ((unsigned char *)newinst) + (size - _class->_udsize);\r
 109                 }\r
 110                 return newinst;\r
 111         }\r
 112         ~SQInstance();\r
 113         bool Get(const SQObjectPtr &key,SQObjectPtr &val)  {\r
 114                 if(_class->_members->Get(key,val)) {\r
 115                         if(_isfield(val)) {\r
 116                                 SQObjectPtr &o = _values[_member_idx(val)];\r
 117                                 val = _realval(o);\r
 118                         }\r
 119                         else {\r
 120                                 val = _class->_methods[_member_idx(val)].val;\r
 121                         }\r
 122                         return true;\r
 123                 }\r
 124                 return false;\r
 125         }\r
 126         bool Set(const SQObjectPtr &key,const SQObjectPtr &val) {\r
 127                 SQObjectPtr idx;\r
 128                 if(_class->_members->Get(key,idx) && _isfield(idx)) {\r
 129             _values[_member_idx(idx)] = val;\r
 130                         return true;\r
 131                 }\r
 132                 return false;\r
 133         }\r
 134         void Release() {\r
 135                 _uiRef++;\r
 136                 if (_hook) { _hook(_userpointer,0);}\r
 137                 _uiRef--;\r
 138                 if(_uiRef > 0) return;\r
 139                 SQInteger size = _memsize;\r
 140                 this->~SQInstance();\r
 141                 SQ_FREE(this, size);\r
 142         }\r
 143         void Finalize();\r
 144 #ifndef NO_GARBAGE_COLLECTOR \r
 145         void Mark(SQCollectable ** );\r
 146         SQObjectType GetType() {return OT_INSTANCE;}\r
 147 #endif\r
 148         bool InstanceOf(SQClass *trg);\r
 149         bool GetMetaMethod(SQVM *v,SQMetaMethod mm,SQObjectPtr &res);\r
 150 \r
 151         SQClass *_class;\r
 152         SQUserPointer _userpointer;\r
 153         SQRELEASEHOOK _hook;\r
 154         SQInteger _memsize;\r
 155         SQObjectPtr _values[1];\r
 156 };\r
 157 \r
 158 #endif //_SQCLASS_H_\r