[−][src]Trait lock_api::RawRwLockUpgrade

pub unsafe trait RawRwLockUpgrade: RawRwLock {
    fn lock_upgradable(&self);
    fn try_lock_upgradable(&self) -> bool;
    fn unlock_upgradable(&self);
    fn upgrade(&self);
    fn try_upgrade(&self) -> bool;
}

Additional methods for RwLocks which support atomically upgrading a shared lock to an exclusive lock.

This requires acquiring a special "upgradable read lock" instead of a normal shared lock. There may only be one upgradable lock at any time, otherwise deadlocks could occur when upgrading.

Required methods

`fn lock_upgradable(&self)`

Acquires an upgradable lock, blocking the current thread until it is able to do so.

`fn try_lock_upgradable(&self) -> bool`

Attempts to acquire an upgradable lock without blocking.

`fn unlock_upgradable(&self)`

Releases an upgradable lock.

`fn upgrade(&self)`

Upgrades an upgradable lock to an exclusive lock.

`fn try_upgrade(&self) -> bool`

Attempts to upgrade an upgradable lock to an exclusive lock without blocking.

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Implementors

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