[haiku-development] Re: Help with memory allocation in WebKit JavaScriptCore
- From: Ingo Weinhold <bonefish@xxxxxxxxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Thu, 16 Aug 2007 10:42:34 +0200
On 2007-08-16 at 05:41:08 [+0200], Bryan Varner <bryan@xxxxxxxxxxxxx> wrote:
> > The main problem I'm having is with the memory allocation method.
> > Basically what seems to be needed is a way to allocate memory in a
> > nice aligned chunk. One way to do this is with the function
> > posix_memalign:
> >
> >
> http://www.opengroup.org/onlinepubs/000095399/functions/posix_memalign.html
> >
> > Haiku doesn't seem to implement this. The relevant bit of code is here:
>
> This function should do the trick.
> haiku/headers/posix/malloc.h:20
> extern void *memalign(size_t alignment, size_t numBytes);
>
> > http://pastie.caboo.se/88124
>
> I think something like...
>
> #elif PLATFORM(HAIKU)
> void *address = memalign(BLOCK_SIZE, BLOCK_SIZE);
> memset(reinterpret_cast<void*>(address), 0, BLOCK_SIZE);
> #else
> ...
>
> might just do the trick.
The memset() is not necessary according to the specification. But instead of
adding a special case to your port, rather add a posix_memalign()
implementation to Haiku. The prototype goes to malloc.h, the implementation
to src/system/libroot/posix/malloc/wrapper.cpp.
CU, Ingo
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