ordered-locks

A rust libary for assigning levels to locks at compiletime in order to avoid deadlocks.

```rust use ordered_locks::{L1, L2, Mutex, CleanLockToken}; // Create value at lock level 0, this lock cannot be acquired while a level1 lock is heldt let v1 = Mutex::::new(42); // Create value at lock level 1 let v2 = Mutex::::new(43); // Construct a token indicating that this thread does not hold any locks let mut token = unsafe {CleanLockToken::new()};

{ // We can aquire the locks for v1 and v2 at the same time let mut g1 = v1.lock(token.token()); let (g1, token) = g1.token_split(); let mut g2 = v2.lock(token); *g2 = 11; *g1 = 12; } // Once the guards are dropped we can acquire other things *v2.lock(token.token()) = 13;

// One cannot acquire locks in the wrong order let mut g2 = v2.lock(token); let (g2, token) = g2.token_split(); let mut g1 = v1.lock(token); // shouldn't compile! *g2 = 11; *g1 = 12; ```