Commit 6b96e7db authored by Stefan Behnel's avatar Stefan Behnel

Merge branch '0.23.x'

parents f6e74c2a ccd587b6
...@@ -471,8 +471,18 @@ Acquiring and Releasing the GIL ...@@ -471,8 +471,18 @@ Acquiring and Releasing the GIL
Cython provides facilities for acquiring and releasing the Cython provides facilities for acquiring and releasing the
`Global Interpreter Lock (GIL) <http://docs.python.org/dev/glossary.html#term-global-interpreter-lock>`_. `Global Interpreter Lock (GIL) <http://docs.python.org/dev/glossary.html#term-global-interpreter-lock>`_.
This may be useful when calling into (external C) code that may block, or when wanting to use Python from a This may be useful when calling from multi-threaded code into
C callback. (external C) code that may block, or when wanting to use Python
from a (native) C thread callback. Releasing the GIL should
obviously only be done for thread-safe code or for code that
uses other means of protection against race conditions and
concurrency issues.
Note that acquiring the GIL is a blocking thread-synchronising
operation, and therefore potentially costly. It might not be
worth releasing the GIL for minor calculations. Usually, I/O
operations and substantial computations in parallel code will
benefit from it.
.. _nogil: .. _nogil:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment