upstream/mercurial-mirror Files · mercurial/thirdparty/concurrent/futures/__init__.py

debugdeltachain: avoid division by zero when a chain is empty...

debugdeltachain: avoid division by zero when a chain is empty The two ratios chainratio and extraratio are computed using dividers that may be zero when the file is empty. As the denominators are integers, the limit of the ratio "just before zero" is the numerator value itself. If the numerator itself is zero, the ratio value is still meaningful: in both cases, a "good" value is a low ratio, and a size of zero is the optimal case.

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      # Copyright 2009 Brian Quinlan. All Rights Reserved.

      # Licensed to PSF under a Contributor Agreement.

      """Execute computations asynchronously using threads or processes."""

      from __future__ import absolute_import

      __author__ = 'Brian Quinlan (brian@sweetapp.com)'

      from ._base import (

          FIRST_COMPLETED,

          FIRST_EXCEPTION,

          ALL_COMPLETED,

          CancelledError,

          TimeoutError,

          Future,

          Executor,

          wait,

          as_completed,

      )

      from .thread import ThreadPoolExecutor

      try:

          from .process import ProcessPoolExecutor

      except ImportError:

          # some platforms don't have multiprocessing

          pass

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				# Copyright 2009 Brian Quinlan. All Rights Reserved.
				# Licensed to PSF under a Contributor Agreement.

				"""Execute computations asynchronously using threads or processes."""

				from __future__ import absolute_import

				__author__ = 'Brian Quinlan (brian@sweetapp.com)'

				from ._base import (
				FIRST_COMPLETED,
				FIRST_EXCEPTION,
				ALL_COMPLETED,
				CancelledError,
				TimeoutError,
				Future,
				Executor,
				wait,
				as_completed,
				)
				from .thread import ThreadPoolExecutor

				try:
				from .process import ProcessPoolExecutor
				except ImportError:
				# some platforms don't have multiprocessing
				pass