memalloc
slab = memalloc(sizeof(*slab), 0);
static void *memalloc(size_t size, int flags);
ptr = memalloc(size, 0);
ptr = memalloc(number * size, SAFLAG_ZERO);
ret = memalloc(size, 0);
*memptr = memalloc(alignment, 0);
obj = memalloc(nsize, 0);
if ((sc->memalloc & (1 << win)) == 0) {
sc->memalloc |= (1 << win);
sc->memalloc &= ~(1 << window);
if (sc->memalloc & (1 << win))
sc->memalloc = 0;
int memalloc;