wireproto: start to associate frame generation with a stream
An upcoming commit will introduce "streams" into the frame-based wire
protocol. In preparation for this invasive change, we introduce a basic
"stream" class and have all operations that create frames also operate
alongside a stream instance.
Differential Revision: https://phab.mercurial-scm.org/D2906
# Dummy extension that adds a delay after acquiring a lock.
#
# This extension can be used to test race conditions between lock acquisition.
from __future__ import absolute_import
import os
import time
def reposetup(ui, repo):
class delayedlockrepo(repo.__class__):
def lock(self):
delay = float(os.environ.get('HGPRELOCKDELAY', '0.0'))
if delay:
time.sleep(delay)
res = super(delayedlockrepo, self).lock()
delay = float(os.environ.get('HGPOSTLOCKDELAY', '0.0'))
if delay:
time.sleep(delay)
return res
repo.__class__ = delayedlockrepo