Function arena_extent_alloc_large

deps/jemalloc/src/arena.c:427–477

}

extent_t *
arena_extent_alloc_large(tsdn_t *tsdn, arena_t *arena, size_t usize,
    size_t alignment, bool *zero) {
	extent_hooks_t *extent_hooks = EXTENT_HOOKS_INITIALIZER;

	witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
	    WITNESS_RANK_CORE, 0);

	szind_t szind = sz_size2index(usize);
	size_t mapped_add;
	bool commit = true;
	extent_t *extent = extents_alloc(tsdn, arena, &extent_hooks,
	    &arena->extents_dirty, NULL, usize, sz_large_pad, alignment, false,
	    szind, zero, &commit);
	if (extent == NULL && arena_may_have_muzzy(arena)) {
		extent = extents_alloc(tsdn, arena, &extent_hooks,
		    &arena->extents_muzzy, NULL, usize, sz_large_pad, alignment,
		    false, szind, zero, &commit);
	}
	size_t size = usize + sz_large_pad;
	if (extent == NULL) {
		extent = extent_alloc_wrapper(tsdn, arena, &extent_hooks, NULL,
		    usize, sz_large_pad, alignment, false, szind, zero,
		    &commit);
		if (config_stats) {
			/*
			 * extent may be NULL on OOM, but in that case
			 * mapped_add isn't used below, so there's no need to
			 * conditionlly set it to 0 here.
			 */
			mapped_add = size;
		}
	} else if (config_stats) {
		mapped_add = 0;
	}

	if (extent != NULL) {
		if (config_stats) {
			arena_stats_lock(tsdn, &arena->stats);
			arena_large_malloc_stats_update(tsdn, arena, usize);
			if (mapped_add != 0) {
				arena_stats_add_zu(tsdn, &arena->stats,
				    &arena->stats.mapped, mapped_add);
			}
			arena_stats_unlock(tsdn, &arena->stats);
		}
		arena_nactive_add(arena, size >> LG_PAGE);
	}

	return extent;
}

void
arena_extent_dalloc_large_prep(tsdn_t *tsdn, arena_t *arena, extent_t *extent) {