Sure there is. Pass around the connection socket as needed, or have a layer in front of the processing layer to only hand out the work when it is good to go.
Can you point to a working example of this that actually solves the problem? i.e., that is demonstrably more efficient for any given request than the FIFO wakeup method?
That's why I said "it's not possible to solve this problem generally." That is, there's no general solution to the problem, one that is optimal for all workloads.
