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Commit 1574682

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Initial version of ConcurrentDict container via TBB hashmap (#972)

* Initial version of ConcurrentDict container via TBB hashmap Motivation: SDC relies on typed.Dict implementation in many core pandas algorithms, and it doesn't support concurrent read/writes. To fill this gap we add ConcurrentDict type which will be used if threading layer is TBB. * Fixing PEP and updating failing import * Fixing builds, warnings and complying to C++11 syntax * Fixing PEP and review comments #1 * Fixing remarks #2 * Applying remarks #3

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sdc
- __init__.py
- extensions
  - sdc_hashmap_ext.py
  - sdc_hashmap_type.py
- native
  - conc_dict_module.cpp
  - hashmap.hpp
- tests
  - __init__.py
  - test_tbb_hashmap.py
setup.py

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`‎sdc/init.py‎`

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 import sdc.extensions.indexes.range_index_ext
 import sdc.extensions.indexes.int64_index_ext
 +import sdc.extensions.sdc_hashmap_ext
++
 from ._version import get_versions
 """

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