Re: First stage of Quesa changes now complete

[Joseph J. S. <jo...@st...>]

At 11:26 AM -0800 1/24/05, James W. Walker wrote:

>When compiled with Q3_MEMORY_DEBUG, E3Memory_AllocateClear uses a 
>block trailer to test for buffer overruns.  Exactly what operator 
>new does on the Mac with CodeWarrior depends on whether we're 
>talking CFM or Mach-O, and what options were used to compile the 
>runtime library. The default on Mach-O is that operator new calls 
>malloc.

It also depends on whether someone has added a custom new operator in 
the appropriate namespace -- something you'd think we have control 
over, but also something very easy to miss when reading the code.

>Also bear in mind that E3ClassInfo* theInfo = new E3ClassInfo ; 
>would throw an exception if the allocation fails, unless you write 
>it as
>E3ClassInfo* theInfo = new(std::nothrow) E3ClassInfo ;

Yes, though this also depends on compiler options.

For all those reasons, I think it's better to call Q3Memory_AllocateClear.

Best,
- Joe

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