Are you familiar with it?

Synchronization with Atomics in C++20

by Rainer Grimm

From the article:

Sender/receiver workflows are quite common for threads. In such a workflow, the receiver is waiting for the sender's notification before it continues to work. There are various ways to implement these workflows. With C++11, you can use condition variables or promise/future pairs; with C++20, you can use atomics...