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venv/lib/python3.12/site-packages/eventlet/hubs/epolls.py

@@ -0,0 +1,31 @@
+import errno
+from eventlet import patcher, support
+from eventlet.hubs import hub, poll
+select = patcher.original('select')
+
+
+def is_available():
+    return hasattr(select, 'epoll')
+
+
+# NOTE: we rely on the fact that the epoll flag constants
+# are identical in value to the poll constants
+class Hub(poll.Hub):
+    def __init__(self, clock=None):
+        super(Hub, self).__init__(clock=clock)
+        self.poll = select.epoll()
+
+    def add(self, evtype, fileno, cb, tb, mac):
+        oldlisteners = bool(self.listeners[self.READ].get(fileno) or
+                            self.listeners[self.WRITE].get(fileno))
+        # not super() to avoid double register()
+        listener = hub.BaseHub.add(self, evtype, fileno, cb, tb, mac)
+        try:
+            self.register(fileno, new=not oldlisteners)
+        except IOError as ex:    # ignore EEXIST, #80
+            if support.get_errno(ex) != errno.EEXIST:
+                raise
+        return listener
+
+    def do_poll(self, seconds):
+        return self.poll.poll(seconds)