concurrent_unordered_multimap::empty Method
Tests whether no elements are present. This method is concurrency safe.
bool empty() const;
Return Value
true if the concurrent container is empty, false otherwise.
Remarks
In the presence of concurrent inserts, whether or not the concurrent container is empty may change immediately after calling this function, before the return value is even read.
Requirements
Header: internal_concurrent_hash.h
Namespace: concurrency