Initial commit

Author: YvesDup

Doc/library/multiprocessing.rst

@@ -1502,6 +1502,15 @@ object -- see :ref:`multiprocessing-managers`.
    A solitary difference from its close analog exists: its ``acquire`` method's
    first argument is named *block*, as is consistent with :meth:`Lock.acquire`.
 
+   .. method:: get_value()
+
+      Return the current value of semaphore.
+
+   .. warning::
+
+      On macOS, raises a :exc:`NotImplementedError` exception because of broken
+      ``sem_getvalue()`` function.
+
 .. note::
 
    On macOS, ``sem_timedwait`` is unsupported, so calling ``acquire()`` with

Lib/multiprocessing/queues.py

@@ -121,7 +121,7 @@ def get(self, block=True, timeout=None):
 
     def qsize(self):
         # Raises NotImplementedError on Mac OSX because of broken sem_getvalue()
-        return self._maxsize - self._sem._semlock._get_value()
+        return self._maxsize - self._sem.get_value()
 
     def empty(self):
         return not self._poll()

Lib/multiprocessing/synchronize.py

@@ -135,11 +135,14 @@ def __init__(self, value=1, *, ctx):
         SemLock.__init__(self, SEMAPHORE, value, SEM_VALUE_MAX, ctx=ctx)
 
     def get_value(self):
+        """Returns current value of Semaphore. Raises NotImplementedError
+        on Mac OSX because of broken sem_getvalue()
+        """
         return self._semlock._get_value()
 
     def __repr__(self):
         try:
-            value = self._semlock._get_value()
+            value = self.get_value()
         except Exception:
             value = 'unknown'
         return '<%s(value=%s)>' % (self.__class__.__name__, value)
@@ -155,7 +158,7 @@ def __init__(self, value=1, *, ctx):
 
     def __repr__(self):
         try:
-            value = self._semlock._get_value()
+            value = self.get_value()
         except Exception:
             value = 'unknown'
         return '<%s(value=%s, maxvalue=%s)>' % \
@@ -247,8 +250,8 @@ def _make_methods(self):
 
     def __repr__(self):
         try:
-            num_waiters = (self._sleeping_count._semlock._get_value() -
-                           self._woken_count._semlock._get_value())
+            num_waiters = (self._sleeping_count.get_value() -
+                           self._woken_count.get_value())
         except Exception:
             num_waiters = 'unknown'
         return '<%s(%s, %s)>' % (self.__class__.__name__, self._lock, num_waiters)