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Clarified warning about logging use from asynchronous signal handlers.

This commit is contained in:
Vinay Sajip 2009-04-03 21:58:16 +00:00
parent a178a69819
commit 353a85f99c
1 changed files with 4 additions and 3 deletions
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7
Doc/library/logging.rst
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@ -2351,9 +2351,10 @@ 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 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. each handler also creates a lock to serialize access to its underlying I/O.
Note that in Linux/Unix environments, threading APIs may not be usable in If you are implementing asynchronous signal handlers using the :mod:`signal`
asynchronous signal handlers. This may mean that you cannot use logging from module, you may not be able to use logging from within such handlers. This is
within asynchronous signal handlers; please check your OS documentation. because lock implementations in the :mod:`threading` module are not always
re-entrant, and so cannot be invoked from such signal handlers.
Configuration Configuration
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