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//! Ensures that a custom config behaves as the default config, until limits are reached.
//! Prevents regression after #80.
use crate::{cfg::CfgPrivate, Config, Slab};
struct CustomConfig;
#[cfg(target_pointer_width = "64")]
impl Config for CustomConfig {
const INITIAL_PAGE_SIZE: usize = 32;
const MAX_PAGES: usize = 15;
const MAX_THREADS: usize = 256;
const RESERVED_BITS: usize = 24;
}
#[cfg(not(target_pointer_width = "64"))]
impl Config for CustomConfig {
const INITIAL_PAGE_SIZE: usize = 16;
const MAX_PAGES: usize = 6;
const MAX_THREADS: usize = 128;
const RESERVED_BITS: usize = 12;
}
// We should repeat actions several times to detect invalid lifecycle changes.
const ITERS: u64 = 5;
#[track_caller]
fn slab_eq(mut lhs: Slab<u64, impl Config>, mut rhs: Slab<u64, impl Config>) {
let mut lhs_vec = lhs.unique_iter().collect::<Vec<_>>();
lhs_vec.sort_unstable();
let mut rhs_vec = rhs.unique_iter().collect::<Vec<_>>();
rhs_vec.sort_unstable();
assert_eq!(lhs_vec, rhs_vec);
}
/// Calls `insert(); remove()` multiple times to detect invalid releasing.
/// Initially, it revealed bugs in the `Slot::release_with()` implementation.
#[test]
fn insert_remove() {
eprintln!("bits={}; config={:#?}", usize::BITS, CustomConfig::debug());
let default_slab = Slab::<u64, _>::new();
let custom_slab = Slab::<u64, _>::new_with_config::<CustomConfig>();
for i in 0..=ITERS {
let idx = default_slab.insert(i).unwrap();
assert!(default_slab.remove(idx));
let idx = custom_slab.insert(i).unwrap();
assert!(custom_slab.remove(idx));
}
slab_eq(custom_slab, default_slab);
}
/// Calls `get()` multiple times to detect invalid ref counting.
/// Initially, it revealed bugs in the `Slot::get()` implementation.
#[test]
fn double_get() {
eprintln!("bits={}; config={:#?}", usize::BITS, CustomConfig::debug());
let default_slab = Slab::<u64, _>::new();
let custom_slab = Slab::<u64, _>::new_with_config::<CustomConfig>();
for i in 0..=ITERS {
let idx = default_slab.insert(i).unwrap();
assert!(default_slab.get(idx).is_some());
assert!(default_slab.get(idx).is_some());
assert!(default_slab.remove(idx));
let idx = custom_slab.insert(i).unwrap();
assert!(custom_slab.get(idx).is_some());
assert!(custom_slab.get(idx).is_some());
assert!(custom_slab.remove(idx));
}
slab_eq(custom_slab, default_slab);
}
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