Locking Containers

Containers need to be locked during certain operations, for example device I/O

container_lock_map (handle, unmap) => map item
container_lock_physical (handle, unmap) => array of physical addresses
container_unlock (handle)

Locks a container
Protects the physical memory from being unmapping or deallocated
If unmap is true, all maps are unmapped and noone else may map the item
Returns a map item or the physical addresses
Increments the version id

container_unmap_all (handle) => version id

Unmaps all pages in container from all other tasks
Increments the version id and returns it