squserdata.h

00001 /*  see copyright notice in squirrel.h */
00002 #ifndef _SQUSERDATA_H_
00003 #define _SQUSERDATA_H_
00004 
00005 struct SQUserData : SQDelegable
00006 {
00007   SQUserData(SQSharedState *ss){ _delegate = 0; _hook = NULL; INIT_CHAIN(); ADD_TO_CHAIN(&_ss(this)->_gc_chain, this); }
00008   ~SQUserData()
00009   {
00010     REMOVE_FROM_CHAIN(&_ss(this)->_gc_chain, this);
00011     SetDelegate(NULL);
00012   }
00013   static SQUserData* Create(SQSharedState *ss, SQInteger size)
00014   {
00015     SQUserData* ud = (SQUserData*)SQ_MALLOC(sizeof(SQUserData)+(size-1));
00016     new (ud) SQUserData(ss);
00017     ud->_size = size;
00018     ud->_typetag = 0;
00019     return ud;
00020   }
00021 #ifndef NO_GARBAGE_COLLECTOR
00022   void Mark(SQCollectable **chain);
00023   void Finalize(){SetDelegate(NULL);}
00024 #endif
00025   void Release() {
00026     if (_hook) _hook(_val,_size);
00027     SQInteger tsize = _size - 1;
00028     this->~SQUserData();
00029     SQ_FREE(this, sizeof(SQUserData) + tsize);
00030   }
00031 
00032   SQInteger _size;
00033   SQRELEASEHOOK _hook;
00034   SQUserPointer _typetag;
00035   SQChar _val[1];
00036 };
00037 
00038 #endif //_SQUSERDATA_H_

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