Otherwise, a Junction map is a lot like a big array of `std::atomic<>` variables, where the key is an index into the array. More precisely:
* All of a Junction map's member functions, together with its `Mutator` member functions, are atomic with respect to each other, so you can safely call them from any thread without mutual exclusion.
Otherwise, a Junction map is a lot like a big array of `std::atomic<>` variables, where the key is an index into the array. More precisely:
* All of a Junction map's member functions, together with its `Mutator` member functions, are atomic with respect to each other, so you can safely call them from any thread without mutual exclusion.