Struct RefBlockWriteGuard

pub(super) struct RefBlockWriteGuard<'a> {
    rb: &'a RefBlock,
    _lock: MutexGuard<'a, ()>,
}

Write guard for a refblock.

Fields

rb: &'a RefBlock

Referenced refblock.

_lock: MutexGuard<'a, ()>

Held guard mutex on that refblock.

Implementations

impl RefBlockWriteGuard<'_>

unsafe fn fetch_update_bitset( bitset: &AtomicU8, change: i64, base_mask: u8, shift: usize, ) -> Result<u64>

Safety

Caller must ensure there are no concurrent writers.

unsafe fn fetch_update_full<T, L: FnOnce(&T) -> u64, S: FnOnce(&T, u64) -> Result<(), TryFromIntError>>( atomic: &T, change: i64, load: L, store: S, ) -> Result<u64>

Safety

Caller must ensure there are no concurrent writers.

fn modify(&mut self, index: usize, change: i64) -> Result<u64>

Modify the given cluster’s refcount.

pub fn increment(&mut self, index: usize) -> Result<u64>

Increment the given cluster’s refcount.

Returns the old value.

pub fn decrement(&mut self, index: usize) -> Result<u64>

Decrement the given cluster’s refcount.

Returns the old value.

pub fn is_zero(&self, index: usize) -> bool

Check whether the given cluster’s refcount is 0.