Comment by gpderetta
10 hours ago
A mutex is a way to guarantee mutual exclusion nothing more nothing less; You can recover synchronous behaviour if you really want:
synchronized<Something> something;
...
co_await something.async_visit([&](Something& x) {
/* critical section here */
});
that isn't a mutex, that's delegating work asynchronously and delegating something else to run when it is complete (the implicitly defined continuation through coroutines).
In systems programming parlance, a mutex is a resource which can be acquired and released, acquired exactly once, and blocks on acquire if already acquired.
Do a CPS transform of your typical std::mutex critical section and you'll find they are exactly the same.
They're not, the interactions with the memory model are different, as are the guarantees.
CPS shouldn't be able to deadlock for example?
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