Re: valloc()?

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Bruno Haible wrote:

| Therefore I'd suggest a new interface: void*
| pagealign_alloc(size_t); void pagealign_free(void*);
|
| and do the implementation as follows: - If mmap() is available, use
| mmap and some bookkeeping for pagealign_alloc, and munmap() for
| pagealign_free, - Otherwise, if posix_memalign() is available, use
| it and free(), - Otherwise, use something similar to the valloc()
| above.


Why do you prefer mmap to posix_memalign?  I'm almost done with the
implementation you suggested (I'm testing the MMAP version now, then
I'll go through with various combinations of HAVE_MMAP,
HAVE_MAP_ANONYMOUS, and HAVE_POSIX_MEMALIGN, but it strikes me that my
bookkeeping for mmap could slow things down if many blocks were
allocated (I'm storing the ptr->size map in a simple linked list, but
even something more efficient would eventually slow).

Regards,

Derek
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