Issue #12040: Expose a new attribute `sentinel` on instances of
:class:`multiprocessing.Process`. Also, fix Process.join() to not use
polling anymore, when given a timeout.
diff --git a/Lib/multiprocessing/process.py b/Lib/multiprocessing/process.py
index 3fb9ff6..99ee532 100644
--- a/Lib/multiprocessing/process.py
+++ b/Lib/multiprocessing/process.py
@@ -132,6 +132,7 @@
else:
from .forking import Popen
self._popen = Popen(self)
+ self._sentinel = self._popen.sentinel
_current_process._children.add(self)
def terminate(self):
@@ -218,6 +219,17 @@
pid = ident
+ @property
+ def sentinel(self):
+ '''
+ Return a file descriptor (Unix) or handle (Windows) suitable for
+ waiting for process termination.
+ '''
+ try:
+ return self._sentinel
+ except AttributeError:
+ raise ValueError("process not started")
+
def __repr__(self):
if self is _current_process:
status = 'started'