Macro tari_utilities::acquire_lock

macro_rules! acquire_lock {
    ($e:expr, $m:ident) => { ... };
    ($e:expr) => { ... };
}

This macro returns a Mutex or RwLock guard without returning a PoisonError. If the lock is poisoned (i.e. a panic before a MutexGuard / RwLockGuard is dropped), the last value before the panic occurred is used. The semantics of this macro are similar to a database transaction rollback on failure.