Function pmem::drain

pub fn drain()

Waits for any pmem stores to drain from HW buffers

This is the second of two steps in flushing to persistence, the first step is flush(1).

These steps are performed together when persist(1) is called.

Note that either of these steps may be unnecessary on a given platform, and the library knows how to check for that and do the right thing. For example, on Intel platforms, pmem_drain() is an empty function.