Function slab_map_lock

src/foundation/slab_alloc.c:127–131

static atomic_flag g_slab_map_lock = ATOMIC_FLAG_INIT;

static void slab_map_lock(void) {
    while (atomic_flag_test_and_set_explicit(&g_slab_map_lock, memory_order_acquire)) {
        /* Spin — cold path only (page create/destroy/retire). */
    }
}
static void slab_map_unlock(void) {
    atomic_flag_clear_explicit(&g_slab_map_lock, memory_order_release);
}