Struct RwLock

pub struct RwLock {
    state: Atomic<u32>,
    writer_notify: Atomic<u32>,
}

Fields

state: Atomic<u32>

writer_notify: Atomic<u32>

Implementations

impl RwLock

pub const fn new() -> Self

pub fn try_read(&self) -> bool

pub fn read(&self)

pub unsafe fn read_unlock(&self)

Safety

The RwLock must be read-locked (N readers) in order to call this.

fn read_contended(&self)

pub fn try_write(&self) -> bool

pub fn write(&self)

pub unsafe fn write_unlock(&self)

Safety

The RwLock must be write-locked (single writer) in order to call this.

pub unsafe fn downgrade(&self)

Safety

The RwLock must be write-locked (single writer) in order to call this.

fn write_contended(&self)

fn wake_writer_or_readers(&self, state: u32)

Wakes up waiting threads after unlocking.

If both are waiting, this will wake up only one writer, but will fall back to waking up readers if there was no writer to wake up.

fn wake_writer(&self) -> bool

This wakes one writer and returns true if we woke up a writer that was blocked on futex_wait.

If this returns false, it might still be the case that we notified a writer that was about to go to sleep.

fn spin_until(&self, f: impl Fn(u32) -> bool) -> u32

Spin for a while, but stop directly at the given condition.

fn spin_write(&self) -> u32

fn spin_read(&self) -> u32