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QuestionWinInet, MSHTMl, Multi Threading Pin
keshavcn26-Jul-06 3:55
Memberkeshavcn26-Jul-06 3:55 
Hi,

I've written a library in VC++.NET2003 with 1 exposed class and 2 Inner classes:

Inner Class1:

WinInet Wrapper used in making HTTP requests through WinInet APIs (InternetOpenW, InternetOpenUrlW, InternetReadFile).

Inner Class2:

MSHTML wrapper used in extracting text/links out of HTML. All the interaction with the MSHTML is done through mshtml.h

Exposed Class:

Exposes various functions to make HTTP requests, transform the HTML data etc.

Above library is used in a C# GUI application. This app spawns upto 50 threads and in each of these threads, C++ library will be called.

I'm very much new to C++, but after going through various articles and source code examples, I've written the library and it is working fine if used sporadically. But in the Multithreading scenario, memory is shooting up and CPU usage was also very high. Read somewhere to rename/delete the below given Reg key:

HKCU\Software\Microsft\CurrentVersion\InternetSettings\ZoneMap

I'd changed the Zonemap name to Zonemap1. Since then the CPU usage has come down but the memory problem remains.

Prior to writing the C++ library, used MSXML3 (xmlHTTP) and mshtml.dll in C# itself. But Microsft specifically says not to use MSXML in .NET. Though MSXML was quite fast, it also consumed tonnes of memory.

Now I'm at a crossroads and not sure which one is causing the problem:

WinInet
MSHTML.
Using the above in multiple threads.

Could some one tell me what is causing the problem or point out to links\articles?


Thanks & Warm Regards,
Keshav
AnswerRe: WinInet, MSHTMl, Multi Threading Pin
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