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From Albert Strasheim <13640...@sun.ac.za>
Subject Re: Licensing and Porting Issue for the CMS (ActiveMQ-CPP) on Visual Studio 6 from Visual Studio 8
Date Fri, 25 May 2007 16:12:00 GMT
Hello

On Fri, 25 May 2007, Nathan Mittler wrote:

> FYI, we're not planning on making any changes to activemq-cpp to address the
> shortcomings of other compilers.
>
> Regarding the destroy methods for deallocating amq-cpp resources, do you
> think this would be required for clients that are built with newer msvc
> compilers?  Would it also be a problem for gcc or just msvc?

Firstly, I think this is a Microsoft compiler only problem.

Where most people run into this issue is when they try to use some code 
built in Debug mode together with some code built in Release mode. Your 
objects get allocated on a special debug heap when you create them in 
debug code, which allows the Microsoft runtime to debug all kinds of 
interesting error conditions.

However, you also run into this problem when you have different parts 
of your program compiled with different versions of Visual Studio. 
Although all your code might be built in release mode, depending on the 
runtime it is linked against (static link to MSVC 7.1 runtime, static 
link to MSVC 8.0, or dynamic link to 7.1 or 8.0), your objects end up 
on a different heap and deleting them in code that expects them on 
another heap blows up.

I've found a reference that discusses this issue in more detail:

http://blogs.msdn.com/oldnewthing/archive/2006/09/15/755966.aspx

Cheers,

Albert

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