mirror of https://github.com/morpheus65535/bazarr
41 lines
1.2 KiB
Python
41 lines
1.2 KiB
Python
"""
|
|
IO/concurrency helpers for `tqdm.contrib`.
|
|
"""
|
|
from __future__ import absolute_import
|
|
|
|
from collections import deque
|
|
from concurrent.futures import ThreadPoolExecutor
|
|
|
|
from ..auto import tqdm as tqdm_auto
|
|
|
|
__author__ = {"github.com/": ["casperdcl"]}
|
|
__all__ = ['MonoWorker']
|
|
|
|
|
|
class MonoWorker(object):
|
|
"""
|
|
Supports one running task and one waiting task.
|
|
The waiting task is the most recent submitted (others are discarded).
|
|
"""
|
|
def __init__(self):
|
|
self.pool = ThreadPoolExecutor(max_workers=1)
|
|
self.futures = deque([], 2)
|
|
|
|
def submit(self, func, *args, **kwargs):
|
|
"""`func(*args, **kwargs)` may replace currently waiting task."""
|
|
futures = self.futures
|
|
if len(futures) == futures.maxlen:
|
|
running = futures.popleft()
|
|
if not running.done():
|
|
if len(futures): # clear waiting
|
|
waiting = futures.pop()
|
|
waiting.cancel()
|
|
futures.appendleft(running) # re-insert running
|
|
try:
|
|
waiting = self.pool.submit(func, *args, **kwargs)
|
|
except Exception as e:
|
|
tqdm_auto.write(str(e))
|
|
else:
|
|
futures.append(waiting)
|
|
return waiting
|