[−][src]Trait lock_api::RawRwLockUpgrade
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.