SAX parser memory management

[Chun-chieh Wang <sk...@seed.net.tw>]

Hello,

I have some problem in using Xerces-C parser on Red-Hat Linux.

I package the parser to a shared library to let other program to load
it.

The function is as follows:

-------------------------------------------------------------------------------------------------

int parseConfigFile(Data *data, char *filename){

    try{
         XMLPlatformUtils::Initialize();
    }catch (const XMLException& toCatch){
         return 1;
    }
    SAXParser *parser = new SAXParser();
    parser->setValidationScheme(valScheme);

    XmlHandlers *handler = new XmlHandlers( data, encodingName,
unRepFlags );
    try{
        parser->setDocumentHandler(&handler);
        parser->setErrorHandler(&handler);

        parser->parse(filename);

    }catch (const XMLException& toCatch){
        return -1;
    }
    delete handler;
    delete parser;

    return 0;
}
-------------------------------------------------------------------------------------------------



Every time I call this function, the program require about 4K memory,
but I don't know how to release this memory. My program have to
periodically parse the xml file, so that the memory will be exhausted
soon.

I have no idea about how to resolve this memory leak.

Should I use the parser this way?

I try to call the  XMLPlatformUtils::Terminate () function,
but that makes my original program crash, that is, I can't reuse this
parser.

Please tell me how to fix that.



Thank you very much!


C. Wang

Re: SAX parser memory management

[Dean Roddey <dr...@charmedquark.com>]

This :

    XmlHandlers *handler = new XmlHandlers( data, encodingName,
unRepFlags );
    try{
        parser->setDocumentHandler(&handler);
        parser->setErrorHandler(&handler);

is not correct. You already have a handler pointer, so you don't need to
take the address of it.

--------------------------
Dean Roddey
The CIDLib C++ Frameworks
Charmed Quark Software
droddey@charmedquark.com
http://www.charmedquark.com

"It takes two buttocks to make friction"
    - African Proverb


----- Original Message -----
From: "Chun-chieh Wang" <sk...@seed.net.tw>
To: <xe...@xml.apache.org>
Sent: Wednesday, August 30, 2000 4:15 AM
Subject: SAX parser memory management


>
>
> Hello,
>
> I have some problem in using Xerces-C parser on Red-Hat Linux.
>
> I package the parser to a shared library to let other program to load
> it.
>
> The function is as follows:
>
> --------------------------------------------------------------------------
-----------------------
>
> int parseConfigFile(Data *data, char *filename){
>
>     try{
>          XMLPlatformUtils::Initialize();
>     }catch (const XMLException& toCatch){
>          return 1;
>     }
>     SAXParser *parser = new SAXParser();
>     parser->setValidationScheme(valScheme);
>
>     XmlHandlers *handler = new XmlHandlers( data, encodingName,
> unRepFlags );
>     try{
>         parser->setDocumentHandler(&handler);
>         parser->setErrorHandler(&handler);
>
>         parser->parse(filename);
>
>     }catch (const XMLException& toCatch){
>         return -1;
>     }
>     delete handler;
>     delete parser;
>
>     return 0;
> }
> --------------------------------------------------------------------------
-----------------------
>
>
>
> Every time I call this function, the program require about 4K memory,
> but I don't know how to release this memory. My program have to
> periodically parse the xml file, so that the memory will be exhausted
> soon.
>
> I have no idea about how to resolve this memory leak.
>
> Should I use the parser this way?
>
> I try to call the  XMLPlatformUtils::Terminate () function,
> but that makes my original program crash, that is, I can't reuse this
> parser.
>
> Please tell me how to fix that.
>
>
>
> Thank you very much!
>
>
> C. Wang
>
>
> ---------------------------------------------------------------------
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>