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Issue #4892: multiprocessing Connections can now be transferred over multiprocessing Connections.

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Patch by Richard Oudkerk (sbt).
This commit is contained in:
Antoine Pitrou 2012-04-24 22:56:57 +02:00
parent 9f478c021d
commit 5438ed1572
8 changed files with 281 additions and 191 deletions
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19
Lib/multiprocessing/forking.py
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@ -407,25 +407,6 @@ else:
return d
#
# Make (Pipe)Connection picklable
#
# Late import because of circular import
from .connection import Connection, PipeConnection
def reduce_connection(conn):
if not Popen.thread_is_spawning():
raise RuntimeError(
'By default %s objects can only be shared between processes\n'
'using inheritance' % type(conn).__name__
)
return type(conn), (Popen.duplicate_for_child(conn.fileno()),
conn.readable, conn.writable)
ForkingPickler.register(Connection, reduce_connection)
ForkingPickler.register(PipeConnection, reduce_connection)
#
# Prepare current process
#