[EMAIL PROTECTED] wrote:
Dear Sir :
I use xerces for parsing XML String , I found some
question in my test
platform : IBM AIX 5.2
complier : IBM VA C++
xerces version : 2-8-0
Q1. xerces can support multi-thread ? ( I found answer in
xerces faq from http://xerces.apache.org/xerces-c/faq-parse-3.html#faq-6 )
need you double confirm
Why do you need confirmation? If you follow the instructions in the
FAQ, you should not have any problems with using Xerces-C in a
multi-threaded application.
Q2. In my function , always core dump in ( new
MemBufInputSource )
OK, please show us the stack trace for the dump.
I use C++ while function for test xerces have memory
leak
I'm afraid I don't understand what you're saying.
Q3. If I use C++ delete function delete xerces object ,
why xerces still have memory leak ?
Perhaps the leak is in your code and not in Xerces-C?
Q4. MemBufInputSource have limit usage ?
I'm not sure what you mean by "limit usage." As long as you use the
class correctly, it should work as designed.
attach file is my function
Source Code
=========================================================================================
try
{
XMLPlatformUtils::Initialize();
PPT_METHODTRACE_V1( "" , "================== Now Starting Parse XML
==================" ) ;
string XMLString = (const char * )xmlContextInfoSeq[i].xmlContext ;
I'm not sure why this cast is necessary. What is the type of
xmlContextInfoSeq[i]xmlContext?
string parseString = "";
PPT_METHODTRACE_V2( "" , " XMLString :" , XMLString.c_str() );
string bufferId = "prodInfo" ;
MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager;
MemoryManager* const manager2 = XMLPlatformUtils::fgMemoryManager;
MemBufInputSource* memBufIS = new MemBufInputSource ((const
XMLByte*)XMLString.c_str(),
strlen(XMLString.c_str()),
Why not use XMLString.length() here?
bufferId.c_str(),
false,
manager2
);
DOMInputSource * inSource = new Wrapper4InputSource(memBufIS,true,
manager);
You have indicated to Wrapper4InputSource that it owns the object
pointed to by "memBufIS," so it will delete the instance in its destructor.
DOMImplementation *impl =
DOMImplementationRegistry::getDOMImplementation(X(""));
DOMBuilder* parser = ((DOMImplementationLS*)impl)->
createDOMBuilder(DOMImplementationLS::MODE_SYNCHRONOUS, 0);
DOMDocument* xmlDoc;
xmlDoc = parser->parse(*inSource);
DOMElement * root = xmlDoc->getDocumentElement();
DOMNodeList * list = xmlDoc->getElementsByTagName(X("ObjInfo"));
//=============================//
// XMLSize_t Use Size_t //
// default start from value 0 //
//=============================//
for ( XMLSize_t index_Attr = 0 ; index_Attr < list->getLength() ;
index_Attr++ )
{
DOMElement * elem =
static_cast<DOMElement*>(list->item(index_Attr)) ;
string lot_id = "" ;
string eqp_id = "" ;
string value = "" ;
objectIdentifier mem_control ;
const XMLCh * tmpxmlch = elem->getAttribute(X("ObjType"));
mem_control.identifier = XMLString::transcode(tmpxmlch);
You need to call XMLString::release() on the pointer returned by
XMLString::transcode(). I don't know what the type of
mem_control.identifier is, but this could be a leak.
value = (const char *)mem_control.identifier ;
Why do you need this cast?
PPT_METHODTRACE_V2( "" , " Objtype value :" , value.c_str() );
if ( value == "Equipment" )
{
objectIdentifier mem_control2 ;
const XMLCh * tmpxmlch2 = elem->getAttribute(X("Value"));
mem_control2.identifier = XMLString::transcode(tmpxmlch2);
Again, this may be a leak.
eqp_id = (const char *)mem_control2.identifier;
Again, why do you need this cast?
PPT_METHODTRACE_V2( "" , " eqp_id :" , eqp_id.c_str() );
setIDLstring(strObjXMLparse_out.strXMLvalueSeq[i].eqpID ,
eqp_id ) ;
PPT_METHODTRACE_V2( "" , "
strObjXMLparse_out.strXMLvalueSeq[i].eqpID " ,
strObjXMLparse_out.strXMLvalueSeq[i].eqpID );
}
else if ( value == "Lot" )
{
objectIdentifier mem_control3 ;
const XMLCh * tmpxmlch3 = elem->getAttribute(X("Value")) ;
mem_control3.identifier = XMLString::transcode(tmpxmlch3);
Perhaps another leak.
lot_id = (const char *)mem_control3.identifier ;
Another strange cast.
PPT_METHODTRACE_V2( "" , " lot_id :" , lot_id.c_str() );
setIDLstring(strObjXMLparse_out.strXMLvalueSeq[i].lotID,lot_id)
;
PPT_METHODTRACE_V2( "" , "
strObjXMLparse_out.strXMLvalueSeq[i].lotID " ,
strObjXMLparse_out.strXMLvalueSeq[i].lotID );
}
}
delete inSource ;
delete parser ;
}
catch (const XMLException& toCatch)
{
char* message = XMLString::transcode(toCatch.getMessage());
PPT_METHODTRACE_V2( "" , "Error during initialization :" , message );
XMLString::release(&message);
return 1;
If you return from this path, you will leave the library initialized.
Since you have no other catch handlers, this could be an exception
that's not from the XMLPlatformUtils::Initialize() call.
}
XMLPlatformUtils::Terminate();
PPT_METHODTRACE_V1( "" , "================== Now Ending Parse XML
==================" ) ;
Best Regards, Sincerely
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