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