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@ r26828:fa6e2fa4b68c
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Location: cpp/openttd-patchpack/source/src/3rdparty/squirrel/squirrel/sqobject.cpp
r26828:fa6e2fa4b68c
17.6 KiB
text/x-c
Codechange: do not hide parameters with local variables
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* see copyright notice in squirrel.h
*/
#include "../../../stdafx.h"
#include "sqpcheader.h"
#include "sqvm.h"
#include "sqstring.h"
#include "sqarray.h"
#include "sqtable.h"
#include "squserdata.h"
#include "sqfuncproto.h"
#include "sqclass.h"
#include "sqclosure.h"
#include "../../../safeguards.h"
const SQChar *IdType2Name(SQObjectType type)
{
switch(_RAW_TYPE(type))
{
case _RT_NULL:return "null";
case _RT_INTEGER:return "integer";
case _RT_FLOAT:return "float";
case _RT_BOOL:return "bool";
case _RT_STRING:return "string";
case _RT_TABLE:return "table";
case _RT_ARRAY:return "array";
case _RT_GENERATOR:return "generator";
case _RT_CLOSURE:
case _RT_NATIVECLOSURE:
return "function";
case _RT_USERDATA:
case _RT_USERPOINTER:
return "userdata";
case _RT_THREAD: return "thread";
case _RT_FUNCPROTO: return "function";
case _RT_CLASS: return "class";
case _RT_INSTANCE: return "instance";
case _RT_WEAKREF: return "weakref";
default:
return nullptr;
}
}
const SQChar *GetTypeName(const SQObjectPtr &obj1)
{
return IdType2Name(type(obj1));
}
SQString *SQString::Create(SQSharedState *ss,const SQChar *s,SQInteger len)
{
SQString *str=ADD_STRING(ss,s,len);
str->_sharedstate=ss;
return str;
}
void SQString::Release()
{
REMOVE_STRING(_sharedstate,this);
}
SQInteger SQString::Next(const SQObjectPtr &refpos, SQObjectPtr &outkey, SQObjectPtr &outval)
{
SQInteger idx = (SQInteger)TranslateIndex(refpos);
while(idx < _len){
outkey = (SQInteger)idx;
outval = SQInteger(_val[idx]);
//return idx for the next iteration
return ++idx;
}
//nothing to iterate anymore
return -1;
}
SQUnsignedInteger TranslateIndex(const SQObjectPtr &idx)
{
switch(type(idx)){
case OT_NULL:
return 0;
case OT_INTEGER:
return (SQUnsignedInteger)_integer(idx);
default: assert(0); break;
}
return 0;
}
SQWeakRef *SQRefCounted::GetWeakRef(SQObjectType type)
{
if(!_weakref) {
sq_new(_weakref,SQWeakRef);
_weakref->_obj._type = type;
_weakref->_obj._unVal.pRefCounted = this;
}
return _weakref;
}
SQRefCounted::~SQRefCounted()
{
if(_weakref) {
_weakref->_obj._type = OT_NULL;
_weakref->_obj._unVal.pRefCounted = nullptr;
}
}
void SQWeakRef::Release() {
if(ISREFCOUNTED(_obj._type)) {
_obj._unVal.pRefCounted->_weakref = nullptr;
}
sq_delete(this,SQWeakRef);
}
bool SQDelegable::GetMetaMethod(SQVM *v,SQMetaMethod mm,SQObjectPtr &res) {
if(_delegate) {
return _delegate->Get((*_ss(v)->_metamethods)[mm],res);
}
return false;
}
bool SQDelegable::SetDelegate(SQTable *mt)
{
SQTable *temp = mt;
if(temp == this) return false;
while (temp) {
if (temp->_delegate == this) return false; //cycle detected
temp = temp->_delegate;
}
if (mt) __ObjAddRef(mt);
__ObjRelease(_delegate);
_delegate = mt;
return true;
}
bool SQGenerator::Yield(SQVM *v)
{
if(_state==eSuspended) { v->Raise_Error("internal vm error, yielding dead generator"); return false;}
if(_state==eDead) { v->Raise_Error("internal vm error, yielding a dead generator"); return false; }
SQInteger size = v->_top-v->_stackbase;
_ci=*v->ci;
_stack.resize(size);
for(SQInteger n =0; n<size; n++) {
_stack._vals[n] = v->_stack[v->_stackbase+n];
v->_stack[v->_stackbase+n] = _null_;
}
SQInteger nvargs = v->ci->_vargs.size;
SQInteger vargsbase = v->ci->_vargs.base;
for(SQInteger j = nvargs - 1; j >= 0; j--) {
_vargsstack.push_back(v->_vargsstack[vargsbase+j]);
}
_ci._generator=nullptr;
for(SQInteger i=0;i<_ci._etraps;i++) {
_etraps.push_back(v->_etraps.top());
v->_etraps.pop_back();
}
_state=eSuspended;
return true;
}
bool SQGenerator::Resume(SQVM *v,SQInteger target)
{
SQInteger size=_stack.size();
if(_state==eDead){ v->Raise_Error("resuming dead generator"); return false; }
if(_state==eRunning){ v->Raise_Error("resuming active generator"); return false; }
SQInteger prevtop=v->_top-v->_stackbase;
PUSH_CALLINFO(v,_ci);
SQInteger oldstackbase=v->_stackbase;
v->_stackbase = v->_top;
v->ci->_target = (SQInt32)target;
v->ci->_generator = this;
v->ci->_vargs.size = (unsigned short)_vargsstack.size();
for(SQInteger i=0;i<_ci._etraps;i++) {
v->_etraps.push_back(_etraps.top());
_etraps.pop_back();
}
for(SQInteger n =0; n<size; n++) {
v->_stack[v->_stackbase+n] = _stack._vals[n];
_stack._vals[0] = _null_;
}
while(_vargsstack.size()) {
v->_vargsstack.push_back(_vargsstack.back());
_vargsstack.pop_back();
}
v->ci->_vargs.base = (unsigned short)(v->_vargsstack.size() - v->ci->_vargs.size);
v->_top=v->_stackbase+size;
v->ci->_prevtop = (SQInt32)prevtop;
v->ci->_prevstkbase = (SQInt32)(v->_stackbase - oldstackbase);
_state=eRunning;
if (type(v->_debughook) != OT_NULL && _rawval(v->_debughook) != _rawval(v->ci->_closure))
v->CallDebugHook('c');
return true;
}
void SQArray::Extend(const SQArray *a){
SQInteger xlen;
if((xlen=a->Size()))
for(SQInteger i=0;i<xlen;i++)
Append(a->_values[i]);
}
const SQChar* SQFunctionProto::GetLocal(SQVM *vm,SQUnsignedInteger stackbase,SQUnsignedInteger nseq,SQUnsignedInteger nop)
{
SQUnsignedInteger nvars=_nlocalvarinfos;
const SQChar *res=nullptr;
if(nvars>=nseq){
for(SQUnsignedInteger i=0;i<nvars;i++){
if(_localvarinfos[i]._start_op<=nop && _localvarinfos[i]._end_op>=nop)
{
if(nseq==0){
vm->Push(vm->_stack[stackbase+_localvarinfos[i]._pos]);
res=_stringval(_localvarinfos[i]._name);
break;
}
nseq--;
}
}
}
return res;
}
SQInteger SQFunctionProto::GetLine(SQInstruction *curr)
{
SQInteger op = (SQInteger)(curr-_instructions);
SQInteger line=_lineinfos[0]._line;
for(SQInteger i=1;i<_nlineinfos;i++){
if(_lineinfos[i]._op>=op)
return line;
line=_lineinfos[i]._line;
}
return line;
}
#define _CHECK_IO(exp) { if(!exp)return false; }
bool SafeWrite(HSQUIRRELVM v,SQWRITEFUNC write,SQUserPointer up,SQUserPointer dest,SQInteger size)
{
if(write(up,dest,size) != size) {
v->Raise_Error("io error (write function failure)");
return false;
}
return true;
}
bool SafeRead(HSQUIRRELVM v,SQWRITEFUNC read,SQUserPointer up,SQUserPointer dest,SQInteger size)
{
if(size && read(up,dest,size) != size) {
v->Raise_Error("io error, read function failure, the origin stream could be corrupted/trucated");
return false;
}
return true;
}
bool WriteTag(HSQUIRRELVM v,SQWRITEFUNC write,SQUserPointer up,SQInteger tag)
{
return SafeWrite(v,write,up,&tag,sizeof(tag));
}
bool CheckTag(HSQUIRRELVM v,SQWRITEFUNC read,SQUserPointer up,SQInteger tag)
{
SQInteger t;
_CHECK_IO(SafeRead(v,read,up,&t,sizeof(t)));
if(t != tag){
v->Raise_Error("invalid or corrupted closure stream");
return false;
}
return true;
}
bool WriteObject(HSQUIRRELVM v,SQUserPointer up,SQWRITEFUNC write,SQObjectPtr &o)
{
_CHECK_IO(SafeWrite(v,write,up,&type(o),sizeof(SQObjectType)));
switch(type(o)){
case OT_STRING:
_CHECK_IO(SafeWrite(v,write,up,&_string(o)->_len,sizeof(SQInteger)));
_CHECK_IO(SafeWrite(v,write,up,_stringval(o),_string(o)->_len));
break;
case OT_INTEGER:
_CHECK_IO(SafeWrite(v,write,up,&_integer(o),sizeof(SQInteger)));break;
case OT_FLOAT:
_CHECK_IO(SafeWrite(v,write,up,&_float(o),sizeof(SQFloat)));break;
case OT_NULL:
break;
default:
v->Raise_Error("cannot serialize a %s",GetTypeName(o));
return false;
}
return true;
}
bool ReadObject(HSQUIRRELVM v,SQUserPointer up,SQREADFUNC read,SQObjectPtr &o)
{
SQObjectType t;
_CHECK_IO(SafeRead(v,read,up,&t,sizeof(SQObjectType)));
switch(t){
case OT_STRING:{
SQInteger len;
_CHECK_IO(SafeRead(v,read,up,&len,sizeof(SQInteger)));
_CHECK_IO(SafeRead(v,read,up,_ss(v)->GetScratchPad(len),len));
o=SQString::Create(_ss(v),_ss(v)->GetScratchPad(-1),len);
}
break;
case OT_INTEGER:{
SQInteger i;
_CHECK_IO(SafeRead(v,read,up,&i,sizeof(SQInteger))); o = i; break;
}
case OT_FLOAT:{
SQFloat f;
_CHECK_IO(SafeRead(v,read,up,&f,sizeof(SQFloat))); o = f; break;
}
case OT_NULL:
o=_null_;
break;
default:
v->Raise_Error("cannot serialize a %s",IdType2Name(t));
return false;
}
return true;
}
bool SQClosure::Save(SQVM *v,SQUserPointer up,SQWRITEFUNC write)
{
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_HEAD));
_CHECK_IO(WriteTag(v,write,up,sizeof(SQChar)));
_CHECK_IO(_funcproto(_function)->Save(v,up,write));
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_TAIL));
return true;
}
bool SQClosure::Load(SQVM *v,SQUserPointer up,SQREADFUNC read,SQObjectPtr &ret)
{
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_HEAD));
_CHECK_IO(CheckTag(v,read,up,sizeof(SQChar)));
SQObjectPtr func;
_CHECK_IO(SQFunctionProto::Load(v,up,read,func));
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_TAIL));
ret = SQClosure::Create(_ss(v),_funcproto(func));
return true;
}
bool SQFunctionProto::Save(SQVM *v,SQUserPointer up,SQWRITEFUNC write)
{
SQInteger i,nliterals = _nliterals,nparameters = _nparameters;
SQInteger noutervalues = _noutervalues,nlocalvarinfos = _nlocalvarinfos;
SQInteger nlineinfos=_nlineinfos,ninstructions = _ninstructions,nfunctions=_nfunctions;
SQInteger ndefaultparams = _ndefaultparams;
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(WriteObject(v,up,write,_sourcename));
_CHECK_IO(WriteObject(v,up,write,_name));
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(SafeWrite(v,write,up,&nliterals,sizeof(nliterals)));
_CHECK_IO(SafeWrite(v,write,up,&nparameters,sizeof(nparameters)));
_CHECK_IO(SafeWrite(v,write,up,&noutervalues,sizeof(noutervalues)));
_CHECK_IO(SafeWrite(v,write,up,&nlocalvarinfos,sizeof(nlocalvarinfos)));
_CHECK_IO(SafeWrite(v,write,up,&nlineinfos,sizeof(nlineinfos)));
_CHECK_IO(SafeWrite(v,write,up,&ndefaultparams,sizeof(ndefaultparams)));
_CHECK_IO(SafeWrite(v,write,up,&ninstructions,sizeof(ninstructions)));
_CHECK_IO(SafeWrite(v,write,up,&nfunctions,sizeof(nfunctions)));
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
for(i=0;i<nliterals;i++){
_CHECK_IO(WriteObject(v,up,write,_literals[i]));
}
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
for(i=0;i<nparameters;i++){
_CHECK_IO(WriteObject(v,up,write,_parameters[i]));
}
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
for(i=0;i<noutervalues;i++){
_CHECK_IO(SafeWrite(v,write,up,&_outervalues[i]._type,sizeof(SQUnsignedInteger)));
_CHECK_IO(WriteObject(v,up,write,_outervalues[i]._src));
_CHECK_IO(WriteObject(v,up,write,_outervalues[i]._name));
}
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
for(i=0;i<nlocalvarinfos;i++){
SQLocalVarInfo &lvi=_localvarinfos[i];
_CHECK_IO(WriteObject(v,up,write,lvi._name));
_CHECK_IO(SafeWrite(v,write,up,&lvi._pos,sizeof(SQUnsignedInteger)));
_CHECK_IO(SafeWrite(v,write,up,&lvi._start_op,sizeof(SQUnsignedInteger)));
_CHECK_IO(SafeWrite(v,write,up,&lvi._end_op,sizeof(SQUnsignedInteger)));
}
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(SafeWrite(v,write,up,_lineinfos,sizeof(SQLineInfo)*nlineinfos));
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(SafeWrite(v,write,up,_defaultparams,sizeof(SQInteger)*ndefaultparams));
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(SafeWrite(v,write,up,_instructions,sizeof(SQInstruction)*ninstructions));
_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
for(i=0;i<nfunctions;i++){
_CHECK_IO(_funcproto(_functions[i])->Save(v,up,write));
}
_CHECK_IO(SafeWrite(v,write,up,&_stacksize,sizeof(_stacksize)));
_CHECK_IO(SafeWrite(v,write,up,&_bgenerator,sizeof(_bgenerator)));
_CHECK_IO(SafeWrite(v,write,up,&_varparams,sizeof(_varparams)));
return true;
}
bool SQFunctionProto::Load(SQVM *v,SQUserPointer up,SQREADFUNC read,SQObjectPtr &ret)
{
SQInteger i, nliterals,nparameters;
SQInteger noutervalues ,nlocalvarinfos ;
SQInteger nlineinfos,ninstructions ,nfunctions,ndefaultparams ;
SQObjectPtr sourcename, name;
SQObjectPtr o;
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(ReadObject(v, up, read, sourcename));
_CHECK_IO(ReadObject(v, up, read, name));
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(SafeRead(v,read,up, &nliterals, sizeof(nliterals)));
_CHECK_IO(SafeRead(v,read,up, &nparameters, sizeof(nparameters)));
_CHECK_IO(SafeRead(v,read,up, &noutervalues, sizeof(noutervalues)));
_CHECK_IO(SafeRead(v,read,up, &nlocalvarinfos, sizeof(nlocalvarinfos)));
_CHECK_IO(SafeRead(v,read,up, &nlineinfos, sizeof(nlineinfos)));
_CHECK_IO(SafeRead(v,read,up, &ndefaultparams, sizeof(ndefaultparams)));
_CHECK_IO(SafeRead(v,read,up, &ninstructions, sizeof(ninstructions)));
_CHECK_IO(SafeRead(v,read,up, &nfunctions, sizeof(nfunctions)));
SQFunctionProto *f = SQFunctionProto::Create(ninstructions,nliterals,nparameters,
nfunctions,noutervalues,nlineinfos,nlocalvarinfos,ndefaultparams);
SQObjectPtr proto = f; //gets a ref in case of failure
f->_sourcename = sourcename;
f->_name = name;
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
for(i = 0;i < nliterals; i++){
_CHECK_IO(ReadObject(v, up, read, o));
f->_literals[i] = o;
}
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
for(i = 0; i < nparameters; i++){
_CHECK_IO(ReadObject(v, up, read, o));
f->_parameters[i] = o;
}
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
for(i = 0; i < noutervalues; i++){
SQUnsignedInteger type;
SQObjectPtr name;
_CHECK_IO(SafeRead(v,read,up, &type, sizeof(SQUnsignedInteger)));
_CHECK_IO(ReadObject(v, up, read, o));
_CHECK_IO(ReadObject(v, up, read, name));
f->_outervalues[i] = SQOuterVar(name,o, (SQOuterType)type);
}
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
for(i = 0; i < nlocalvarinfos; i++){
SQLocalVarInfo lvi;
_CHECK_IO(ReadObject(v, up, read, lvi._name));
_CHECK_IO(SafeRead(v,read,up, &lvi._pos, sizeof(SQUnsignedInteger)));
_CHECK_IO(SafeRead(v,read,up, &lvi._start_op, sizeof(SQUnsignedInteger)));
_CHECK_IO(SafeRead(v,read,up, &lvi._end_op, sizeof(SQUnsignedInteger)));
f->_localvarinfos[i] = lvi;
}
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(SafeRead(v,read,up, f->_lineinfos, sizeof(SQLineInfo)*nlineinfos));
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(SafeRead(v,read,up, f->_defaultparams, sizeof(SQInteger)*ndefaultparams));
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
_CHECK_IO(SafeRead(v,read,up, f->_instructions, sizeof(SQInstruction)*ninstructions));
_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
for(i = 0; i < nfunctions; i++){
_CHECK_IO(_funcproto(o)->Load(v, up, read, o));
f->_functions[i] = o;
}
_CHECK_IO(SafeRead(v,read,up, &f->_stacksize, sizeof(f->_stacksize)));
_CHECK_IO(SafeRead(v,read,up, &f->_bgenerator, sizeof(f->_bgenerator)));
_CHECK_IO(SafeRead(v,read,up, &f->_varparams, sizeof(f->_varparams)));
ret = f;
return true;
}
#ifndef NO_GARBAGE_COLLECTOR
void SQVM::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue)
{
SQSharedState::EnqueueMarkObject(_lasterror,queue);
SQSharedState::EnqueueMarkObject(_errorhandler,queue);
SQSharedState::EnqueueMarkObject(_debughook,queue);
SQSharedState::EnqueueMarkObject(_roottable, queue);
SQSharedState::EnqueueMarkObject(temp_reg, queue);
for(SQUnsignedInteger i = 0; i < _stack.size(); i++) SQSharedState::EnqueueMarkObject(_stack[i], queue);
for(SQUnsignedInteger j = 0; j < _vargsstack.size(); j++) SQSharedState::EnqueueMarkObject(_vargsstack[j], queue);
for(SQInteger k = 0; k < _callsstacksize; k++) SQSharedState::EnqueueMarkObject(_callsstack[k]._closure, queue);
}
void SQArray::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue)
{
SQInteger len = _values.size();
for(SQInteger i = 0;i < len; i++) SQSharedState::EnqueueMarkObject(_values[i], queue);
}
void SQTable::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue)
{
if(_delegate) queue.Enqueue(_delegate);
SQInteger len = _numofnodes;
for(SQInteger i = 0; i < len; i++){
SQSharedState::EnqueueMarkObject(_nodes[i].key, queue);
SQSharedState::EnqueueMarkObject(_nodes[i].val, queue);
}
}
void SQClass::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue)
{
queue.Enqueue(_members);
if(_base) queue.Enqueue(_base);
SQSharedState::EnqueueMarkObject(_attributes, queue);
for(SQUnsignedInteger i =0; i< _defaultvalues.size(); i++) {
SQSharedState::EnqueueMarkObject(_defaultvalues[i].val, queue);
SQSharedState::EnqueueMarkObject(_defaultvalues[i].attrs, queue);
}
for(SQUnsignedInteger j =0; j< _methods.size(); j++) {
SQSharedState::EnqueueMarkObject(_methods[j].val, queue);
SQSharedState::EnqueueMarkObject(_methods[j].attrs, queue);
}
for(SQUnsignedInteger k =0; k< _metamethods.size(); k++) {
SQSharedState::EnqueueMarkObject(_metamethods[k], queue);
}
}
void SQInstance::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue)
{
queue.Enqueue(_class);
SQUnsignedInteger nvalues = _class->_defaultvalues.size();
for(SQUnsignedInteger i =0; i< nvalues; i++) {
SQSharedState::EnqueueMarkObject(_values[i], queue);
}
}
void SQGenerator::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue)
{
for(SQUnsignedInteger i = 0; i < _stack.size(); i++) SQSharedState::EnqueueMarkObject(_stack[i], queue);
for(SQUnsignedInteger j = 0; j < _vargsstack.size(); j++) SQSharedState::EnqueueMarkObject(_vargsstack[j], queue);
SQSharedState::EnqueueMarkObject(_closure, queue);
}
void SQClosure::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue)
{
for(SQUnsignedInteger i = 0; i < _outervalues.size(); i++) SQSharedState::EnqueueMarkObject(_outervalues[i], queue);
for(SQUnsignedInteger i = 0; i < _defaultparams.size(); i++) SQSharedState::EnqueueMarkObject(_defaultparams[i], queue);
}
void SQNativeClosure::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue)
{
for(SQUnsignedInteger i = 0; i < _outervalues.size(); i++) SQSharedState::EnqueueMarkObject(_outervalues[i], queue);
}
void SQUserData::EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue){
if(_delegate) queue.Enqueue(_delegate);
}
void SQCollectable::UnMark() { _uiRef&=~MARK_FLAG; }
#endif
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