Re: Portable dumper, win32

[ Moved to xemacs-beta. ] Fabrice Popineau <Fabrice.Popineau(a)supelec.fr&gt; writes: > * Martin Buchholz <martin(a)xemacs.org&gt; writes: > > > How come Kirill didn't need to do this when he got portable dumping > > working on Windows? He could have done without mmap() by using just open() and read(). > By the way, would the rel_alloc thing be interesting for win32 ? In > this case, having mmap/mmunmap replacements would be useful. Will that work under Windows? The mmap-based relocating allocator works by allocating chunks anonymously. For instance: fd = open ("/dev/zero", O_RDONLY); void *ptr = mmap (0, how_much, PROT_xxx, MAP_SHARED, fd, 0); That way you can allocate a chunk of memory independent of your normal data segment and, more importantly, you can unmap it without causing segmentation. If Windows doesn't support anonymous mapping, mmap-based allocator won't work.