Issue #10673: Document that Process.exitcode can be used to determine timeout
Patch by Tom Clark.
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index d20098f..a5912f7 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -496,6 +496,9 @@
If the optional argument *timeout* is ``None`` (the default), the method
blocks until the process whose :meth:`join` method is called terminates.
If *timeout* is a positive number, it blocks at most *timeout* seconds.
+ Note that the method returns ``None`` if its process terminates or if the
+ method times out. Check the process's :attr:`exitcode` to determine if
+ it terminated.
A process can be joined many times.