Struct unlock::RwLock

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pub struct RwLock<T> { /* private fields */ }
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impl<T> RwLock<T>

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pub fn new(value: T) -> Self

Create a new RwLock<T>.

Examples found in repository?
examples/race.rs (line 7)
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fn main() -> Result<(), Box<dyn std::error::Error>> {
    let lock = Arc::new(RwLock::new(0u64));

    let mut threads = Vec::new();

    unlock::capture();

    for _ in 0..100 {
        let lock = lock.clone();

        threads.push(thread::spawn(move || {
            let mut sum = 0u64;

            for n in 0..100 {
                if n % 4 == 0 {
                    *lock.write() += 1;
                } else {
                    sum += *lock.read();
                }

                std::thread::sleep(std::time::Duration::from_millis(n % 11));
            }

            sum
        }));
    }

    let mut total = 0;

    for thread in threads {
        total += thread.join().unwrap();
    }

    dbg!(total);

    let events = unlock::drain();
    dbg!(events.len());
    unlock::html::write("trace.html", &events)?;
    Ok(())
}
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pub fn read(&self) -> RwLockReadGuard<'_, T>

Lock the RwLock<T> for reading.

Examples found in repository?
examples/race.rs (line 23)
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fn main() -> Result<(), Box<dyn std::error::Error>> {
    let lock = Arc::new(RwLock::new(0u64));

    let mut threads = Vec::new();

    unlock::capture();

    for _ in 0..100 {
        let lock = lock.clone();

        threads.push(thread::spawn(move || {
            let mut sum = 0u64;

            for n in 0..100 {
                if n % 4 == 0 {
                    *lock.write() += 1;
                } else {
                    sum += *lock.read();
                }

                std::thread::sleep(std::time::Duration::from_millis(n % 11));
            }

            sum
        }));
    }

    let mut total = 0;

    for thread in threads {
        total += thread.join().unwrap();
    }

    dbg!(total);

    let events = unlock::drain();
    dbg!(events.len());
    unlock::html::write("trace.html", &events)?;
    Ok(())
}
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pub fn write(&self) -> RwLockWriteGuard<'_, T>

Lock the RwLock<T> for writing.

Examples found in repository?
examples/race.rs (line 21)
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fn main() -> Result<(), Box<dyn std::error::Error>> {
    let lock = Arc::new(RwLock::new(0u64));

    let mut threads = Vec::new();

    unlock::capture();

    for _ in 0..100 {
        let lock = lock.clone();

        threads.push(thread::spawn(move || {
            let mut sum = 0u64;

            for n in 0..100 {
                if n % 4 == 0 {
                    *lock.write() += 1;
                } else {
                    sum += *lock.read();
                }

                std::thread::sleep(std::time::Duration::from_millis(n % 11));
            }

            sum
        }));
    }

    let mut total = 0;

    for thread in threads {
        total += thread.join().unwrap();
    }

    dbg!(total);

    let events = unlock::drain();
    dbg!(events.len());
    unlock::html::write("trace.html", &events)?;
    Ok(())
}

Trait Implementations§

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impl<T> Debug for RwLock<T>
where T: Debug,

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<T> !RefUnwindSafe for RwLock<T>

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impl<T> Send for RwLock<T>
where T: Send,

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impl<T> Sync for RwLock<T>
where T: Sync + Send,

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impl<T> Unpin for RwLock<T>
where T: Unpin,

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impl<T> UnwindSafe for RwLock<T>
where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.