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classes.Protocol: use a lock with updateTS to ensure thread-safety

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Closes #274.
This commit is contained in:
James Lu 2016-07-12 22:08:01 -07:00
parent 6598d56400
commit 58d71b0907
1 changed files with 40 additions and 34 deletions
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6
classes.py
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@ -1131,6 +1131,9 @@ class Protocol():
self.casemapping = 'rfc1459'
self.hook_map = {}
# Lock for updateTS to make sure only one thread can change the channel TS at one time.
self.ts_lock = threading.Lock()
def parseArgs(self, args):
"""Parses a string of RFC1459-style arguments split into a list, where ":" may
be used for multi-word arguments that last until the end of a line.
@ -1187,6 +1190,9 @@ class Protocol():
channel)
self.irc.applyModes(channel, modes)
# Use a lock so only one thread can change a channel's TS at once: this prevents race
# conditions from desyncing the channel list.
with self.ts_lock:
our_ts = self.irc.channels[channel].ts
assert type(our_ts) == int, "Wrong type for our_ts (expected int, got %s)" % type(our_ts)
assert type(their_ts) == int, "Wrong type for their_ts (expected int, got %s)" % type(their_ts)