Trait RawRwLockUpgradeDowngrade 

pub unsafe trait RawRwLockUpgradeDowngrade: RawRwLockUpgrade + RawRwLockDowngrade {
    // Required methods
    unsafe fn downgrade_upgradable(
        &self,
        guard: Self::UpgradableGuard,
    ) -> Self::SharedGuard;
    unsafe fn downgrade_to_upgradable(
        &self,
        guard: Self::ExclusiveGuard,
    ) -> Self::UpgradableGuard;
}

Additional methods for RwLocks which support upgradable locks and lock downgrading.

Safety

Implementations must uphold the safety requirements of RawRwLock for the additional methods provided by this trait. Downgrading from exclusive to upgradable access must release to subsequent lock acquisitions.

Required Methods

unsafe fn downgrade_upgradable( &self, guard: Self::UpgradableGuard, ) -> Self::SharedGuard

Downgrades an upgradable lock to a shared lock.

Safety

This method requires the state for an upgradable acquisition of this lock held in the current context.

unsafe fn downgrade_to_upgradable( &self, guard: Self::ExclusiveGuard, ) -> Self::UpgradableGuard

Downgrades an exclusive lock to an upgradable lock.

Safety

This method requires the state for an exclusive acquisition of this lock held in the current context.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors