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rust-pathauditor: use interior mutability for use in multi-threaded contexts...

rust-pathauditor: use interior mutability for use in multi-threaded contexts The usual recommendation for using `RwLock` or `Mutex` is that if there are about as many write as there are reads, use `Mutex`, and if there are more reads than writes, use `RwLock`. If after the main bottleneck (i.e. parallel traversal) is removed this shows up on profiles, we should investigate using the `parking_lot` since we don't need a poisoning API, or maybe move to different types of caches entirely. Differential Revision: https://phab.mercurial-scm.org/D8213

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      # shallowstore.py - shallow store for interacting with shallow repos

      #

      # Copyright 2013 Facebook, Inc.

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      from __future__ import absolute_import

      def wrapstore(store):

          class shallowstore(store.__class__):

              def __contains__(self, path):

                  # Assume it exists

                  return True

          store.__class__ = shallowstore

          return store

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				# shallowstore.py - shallow store for interacting with shallow repos
				#
				# Copyright 2013 Facebook, Inc.
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.
				from __future__ import absolute_import


				def wrapstore(store):
				class shallowstore(store.__class__):
				def __contains__(self, path):
				# Assume it exists
				return True

				store.__class__ = shallowstore

				return store