Struct VecRangeLock 

pub struct VecRangeLock<T> { /* private fields */ }

General purpose multi-thread range lock for std::vec::Vec.

Example

use range_lock::VecRangeLock;
use std::{sync::{Arc, Barrier}, thread};

let data = vec![10, 11, 12, 13];

let data_lock0 = Arc::new(VecRangeLock::new(data));
let data_lock1 = Arc::clone(&data_lock0);
let data_lock2 = Arc::clone(&data_lock0);

// Thread barrier, only for demonstration purposes.
let barrier0 = Arc::new(Barrier::new(2));
let barrier1 = Arc::clone(&barrier0);

thread::scope(|s| {
    s.spawn(move || {
        {
            let mut guard = data_lock0.try_lock(0..2).expect("T0: Failed to lock 0..2");
            guard[0] = 100; // Write to data[0]
        }
        barrier0.wait(); // Synchronize with second thread.
        {
            let guard = data_lock0.try_lock(2..4).expect("T0: Failed to lock 2..4");
            assert_eq!(guard[0], 200); // Read from data[2]
        }
    });

    s.spawn(move || {
        {
            let mut guard = data_lock1.try_lock(2..4).expect("T1: Failed to lock 2..4");
            guard[0] = 200; // Write to data[2]
        }
        barrier1.wait(); // Synchronize with first thread.
        {
            let guard = data_lock1.try_lock(0..2).expect("T1: Failed to lock 0..2");
            assert_eq!(guard[0], 100); // Read from data[0]
        }
    });
});

let data = Arc::try_unwrap(data_lock2).expect("Arc unwrap failed").into_inner();

assert_eq!(data, vec![100, 11, 200, 13]);

Implementations

impl<'a, T> VecRangeLock<T>

pub fn new(data: Vec<T>) -> VecRangeLock<T>

Construct a new VecRangeLock.

• data: The data Vec to protect.

pub fn data_len(&self) -> usize

Get the length (in number of elements) of the embedded Vec.

pub fn into_inner(self) -> Vec<T>

Unwrap this VecRangeLock into the contained data. This method consumes self.

pub fn try_lock( &'a self, range: impl RangeBounds<usize>, ) -> TryLockResult<VecRangeLockGuard<'a, T>>

Try to lock the given data range.

• On success: Returns a VecRangeLockGuard that can be used to access the locked region. Dereferencing VecRangeLockGuard yields a slice of the data.
• On failure: Returns TryLockError::WouldBlock, if the range is contended. The locking attempt may be retried by the caller upon contention. Returns TryLockError::Poisoned, if the lock is poisoned.

Trait Implementations

impl<T: Debug> Debug for VecRangeLock<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> Sync for VecRangeLock<T>

where T: Send,