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Diffstat (limited to 'Doc/library/logging.rst')
| -rw-r--r-- | Doc/library/logging.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/library/logging.rst b/Doc/library/logging.rst index 6e88b70..5dc4af3 100644 --- a/Doc/library/logging.rst +++ b/Doc/library/logging.rst @@ -2290,6 +2290,10 @@ needing to be done by its clients. It achieves this though using threading locks; there is one lock to serialize access to the module's shared data, and each handler also creates a lock to serialize access to its underlying I/O. +If you are implementing asynchronous signal handlers using the :mod:`signal` +module, you may not be able to use logging from within such handlers. This is +because lock implementations in the :mod:`threading` module are not always +re-entrant, and so cannot be invoked from such signal handlers. Configuration ------------- |