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Should gevent's fork create a new hub in its forked process?
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Liming Zhao  
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 More options May 11 2012, 1:16 pm
From: Liming Zhao <limingz...@gmail.com>
Date: Fri, 11 May 2012 10:16:16 -0700 (PDT)
Local: Fri, May 11 2012 1:16 pm
Subject: Should gevent's fork create a new hub in its forked process?
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using gevent/1.0b2, greenlet/0.3.4

import os
from gevent.hub import fork, get_hub
print 'parent_pid=%d, hub=%s' % (os.getpid(), get_hub())
pid = fork()
if not pid:
    # child
    print 'child_pid=%d, hub=%s' % (os.getpid(), get_hub())
    os._exit(0)
print 'parent_pid=%d, hub=%s' % (os.getpid(), get_hub())

PRINTS:

parent_pid=19326, hub=<Hub at 0x19d92eb0 epoll default pending=0 ref=0
fileno=3>
child_pid=19327, hub=<Hub at 0x19d92eb0 epoll default pending=0 ref=0
fileno=3>
parent_pid=19326, hub=<Hub at 0x19d92eb0 epoll default pending=0 ref=0
fileno=3>

If hub is said to be thread local, should subprocess have its own hub
or not?

Thanks!


 
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Damjan  
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 More options May 11 2012, 2:07 pm
From: Damjan <gdam...@gmail.com>
Date: Fri, 11 May 2012 11:07:16 -0700 (PDT)
Local: Fri, May 11 2012 2:07 pm
Subject: Should gevent's fork create a new hub in its forked process?
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Well, fork creates processes not threads. So the object could have the same id, but still exists in separate kemory spaces.


 
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