[Mesa-dev] [PATCH 3/9] Don't cast the return value of malloc/realloc

Jose Fonseca jfonseca at vmware.com
Wed Sep 5 10:42:29 PDT 2012


----- Original Message -----
> On 09/05/2012 12:42 AM, Matt Turner wrote:
> > This patch has been generated by the following Coccinelle semantic
> > patch:
> >
> > // Don't cast the return value of malloc/realloc.
> > //
> > // Casting the return value of malloc/realloc only stands to hide
> > // errors.
> 
> So assigning a void pointer to a non-void pointer is legal in C and
> illegal in C++.  I seem to recall some people compiling all of Mesa
> with C++ in some situations in the past.  Also, there were some C
> compiler(s) years ago that required these casts (can't remember
> which).
> 
> I'm kind of on the fence about this change.

I don't care for the *.c files either way, but given we're writing new code in C++ (e.g., glsl, llvm) that often needs to interoperate with the C code, we should leave the *.h files alone in order to retain C++ compatability, or they will need to be undone next time somebody wants to include the headers in question.

Jose


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