Integrate threading modules from python-isal

CHANGELOG.rst

@@ -9,6 +9,9 @@ Changelog
 
 version 0.4.0-dev
 -----------------
++ Add a ``gzip_ng_threaded`` module that contains the ``gzip_ng_threaded.open``
+  function. This allows using multithreaded compression as well as escaping the
+  GIL.
 + The internal ``gzip_ng._GzipReader`` has been rewritten in C. As a result the
   overhead of decompressing files has significantly been reduced.
 + The ``gzip_ng._GzipReader`` in C is now used in ``gzip_ng.decompress``. The

README.rst

@@ -42,7 +42,7 @@ by providing Python bindings for the zlib-ng library.
 This package provides Python bindings for the `zlib-ng
 <https://github.com/zlib-ng/zlib-ng>`_ library.
 
-``python-zlib-ng`` provides the bindings by offering two modules:
+``python-zlib-ng`` provides the bindings by offering three modules:
 
 + ``zlib_ng``: A drop-in replacement for the zlib module that uses zlib-ng to
   accelerate its performance.
@@ -51,6 +51,11 @@ This package provides Python bindings for the `zlib-ng
   instead of ``zlib`` to perform its compression and checksum tasks, which
   improves performance.
 
++ ``gzip_ng_threaded`` offers an ``open`` function which returns buffered read
+  or write streams that can be used to read and write large files while
+  escaping the GIL using one or multiple threads. This functionality only
+  works for streaming, seeking is not supported.
+
 ``zlib_ng`` and ``gzip_ng`` are almost fully compatible with ``zlib`` and
 ``gzip`` from the Python standard library. There are some minor differences
 see: differences-with-zlib-and-gzip-modules_.
@@ -68,6 +73,7 @@ The python-zlib-ng modules can be imported as follows
 
     from zlib_ng import zlib_ng
     from zlib_ng import gzip_ng
+    from zlib_ng import gzip_ng_threaded
 
 ``zlib_ng`` and ``gzip_ng`` are meant to be used as drop in replacements so
 their api and functions are the same as the stdlib's modules.

docs/index.rst

@@ -113,6 +113,13 @@ API-documentation: zlib_ng.gzip_ng
       :members:
       :special-members: __init__
 
+===========================================
+API-documentation: zlib_ng.gzip_ng_threaded
+===========================================
+
+.. automodule:: zlib_ng.gzip_ng_threaded
+   :members: open
+
 ===============================
 python -m zlib_ng.gzip_ng usage
 ===============================