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RE: Objects, processes, and encapsulation
Marcel Boosten wrote:
> The callback results in a cyclic call, which causes the problem.
> Note that in CSP, such cyclic calls would typically result in deadlock.
> A sends message to B, and waits for response.
> B sends request to A.
> Deadlock: A is waiting for the result, and cannot handle
> the request sent by B.
> Cyclic & Synchronous relationships are a problem: in CSP and in OO.
> Should they be rulled out? If so, how? If not, how should they be dealt
The original process object could call a method and accept the callback
method in parallel, something like:
+----+ callchannel +----+
| |------------->| |
| |<-------------| |
+----+ callbackchan +----+
This eliminates the deadlock, but this may still results in the callback