Module ref_portals::sync

Theadsafe anchors and portals.
These (but not their guards) are various degrees of Send and Sync depending on their type parameter.

Structs

Anchor	A threadsafe immutable anchor with concurrent read access. Use this to capture immutable references in a threaded environment.
Portal	A threadsafe immutable portal. Dereference it directly with * or .deref().
RwAnchor	A threadsafe mutable anchor with concurrent read access. Use this to capture mutable references to Sync types in a threaded environment.
RwPortal	A threadsafe mutable portal supporting concurred reads. Acquire a guard by calling .read() or .write().
WAnchor	A threadsafe mutable anchor with concurrent read access. Use this to capture mutable references to !Sync types in a threaded environment.
WPortal	A threadsafe mutable portal with only exclusive access. Acquire a guard by calling .lock().
WeakPortal
WeakRwPortal
WeakWPortal