[Python-Dev] Issue #10348: concurrent.futures doesn't work on BSD

[Victor Stinner]

Le mercredi 29 décembre 2010 à 21:49 +0100, "Martin v. Löwis" a écrit :
> Of course, one may wonder why test_first_completed manages
> to create 41 SemLock objects, when all it tries to do is two future
> calls.

More numbers (on Linux):

 - Queue: 3 SemLock
 - Condition: 4 SemLock
 - Event: 5 SemLock
 - Call (test_concurrent_futures): 10 SemLock (2 Event)
 - ProcessPoolExecutor: 11 SemLock (2 Queue, 1 Condition)

FreeBSD 7.2 is limited to 30 semaphores, so with ProcessPoolExecutor,
you can only create *one* Call object, whereas some tests use 4 Call
objects or more.

Victor