Initial push to external_lib migration

1 files changed, 32 insertions, 0 deletions

diff --git a/external_libs/python/zmq/green/device.py b/external_libs/python/zmq/green/device.py
new file mode 100644
index 00000000..4b070237
--- /dev/null
+++ b/external_libs/python/zmq/green/device.py
@@ -0,0 +1,32 @@
+# Copyright (C) PyZMQ Developers
+# Distributed under the terms of the Modified BSD License.
+
+import zmq
+from zmq.green import Poller
+
+def device(device_type, isocket, osocket):
+    """Start a zeromq device (gevent-compatible).
+    
+    Unlike the true zmq.device, this does not release the GIL.
+
+    Parameters
+    ----------
+    device_type : (QUEUE, FORWARDER, STREAMER)
+        The type of device to start (ignored).
+    isocket : Socket
+        The Socket instance for the incoming traffic.
+    osocket : Socket
+        The Socket instance for the outbound traffic.
+    """
+    p = Poller()
+    if osocket == -1:
+        osocket = isocket
+    p.register(isocket, zmq.POLLIN)
+    p.register(osocket, zmq.POLLIN)
+    
+    while True:
+        events = dict(p.poll())
+        if isocket in events:
+            osocket.send_multipart(isocket.recv_multipart())
+        if osocket in events:
+            isocket.send_multipart(osocket.recv_multipart())