Crate uplock

A futures-aware RwLock with ref_count, upgrade, and downgrade methods.

Based on the RwLock in futures_locks, which in turn is based on std::sync::RwLock.

Does not use message passing.

Structs

• RwLock
• RwLockReadFuture
  A Future representing a pending read lock.
• RwLockReadGuard
  A read guard for RwLock (can be dereferenced into &T)
• RwLockWriteFuture
  A Future representing a pending write lock.
• RwLockWriteGuard
  A write guard for RwLock (can be dereferenced into &mut T)