[Python-Dev] Proposed addition to threading module (original) (raw)

"Martin v. Löwis" martin at v.loewis.de
Tue Apr 25 01:35:46 CEST 2006

Tim Peters wrote:

Does

with cv: work to replace the outer (== only) acquire/try/finally/release dance?

Indeed it does - although implemented in a somewhat convoluted way: A lock is a context (or is that "context manager"), i.e. it implements

def context(self): return self enter=acquire def exit(self,*args): return self.release() #roughly

A _Condition has a lock, so it could become the context (manager?) through

def context(self): return self.lock

However, instead of doing that, it does

def context(self): return self

roughly: enter is actually set in init to self.lock.acquire

def enter(self): return self.acquire() def exit(self): return self.release

Looks somewhat redundant to me, but correct.

Regards, Martin