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| author | Victor Stinner <victor.stinner@gmail.com> | 2014-01-21 16:49:41 (GMT) |
|---|---|---|
| committer | Victor Stinner <victor.stinner@gmail.com> | 2014-01-21 16:49:41 (GMT) |
| commit | 7067b5d92770569dcadb7c637517c5fc242339c5 (patch) | |
| tree | 172c2c8c0c797b521160d5959e0914bf693439f8 /Lib/selectors.py | |
| parent | 781a5441aeedb5acbfcd74d52583b1403f2b42f3 (diff) | |
| download | cpython-7067b5d92770569dcadb7c637517c5fc242339c5.zip cpython-7067b5d92770569dcadb7c637517c5fc242339c5.tar.gz cpython-7067b5d92770569dcadb7c637517c5fc242339c5.tar.bz2 | |
selectors: add a comment to explain why and how poll timeout is rounded
Diffstat (limited to 'Lib/selectors.py')
| -rw-r--r-- | Lib/selectors.py | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Lib/selectors.py b/Lib/selectors.py index 63392f5..f8b56cd 100644 --- a/Lib/selectors.py +++ b/Lib/selectors.py @@ -354,10 +354,12 @@ if hasattr(select, 'poll'): def select(self, timeout=None): if timeout is None: timeout = None - elif timeout < 0: + elif timeout <= 0: timeout = 0 else: - timeout = int(math.ceil(timeout * 1000.0)) + # poll() has a resolution of 1 millisecond, round away from + # zero to wait *at least* timeout seconds. + timeout = int(math.ceil(timeout * 1e3)) ready = [] try: fd_event_list = self._poll.poll(timeout) |