1 files changed, 41 insertions, 0 deletions
diff --git a/python/gevent/resolver/blocking.py b/python/gevent/resolver/blocking.py
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+++ b/python/gevent/resolver/blocking.py
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+# Copyright (c) 2018  gevent contributors. See LICENSE for details.
+
+import _socket
+
+class Resolver(object):
+    """
+    A resolver that directly uses the system's resolver functions.
+
+    .. caution::
+
+        This resolver is *not* cooperative.
+
+    This resolver has the lowest overhead of any resolver and
+    typically approaches the speed of the unmodified :mod:`socket`
+    functions. However, it is not cooperative, so if name resolution
+    blocks, the entire thread and all its greenlets will be blocked.
+
+    This can be useful during debugging, or it may be a good choice if
+    your operating system provides a good caching resolver (such as
+    macOS's Directory Services) that is usually very fast and
+    functionally non-blocking.
+
+    .. versionchanged:: 1.3a2
+       This was previously undocumented and existed in :mod:`gevent.socket`.
+
+    """
+
+    def __init__(self, hub=None):
+        pass
+
+    def close(self):
+        pass
+
+    for method in (
+            'gethostbyname',
+            'gethostbyname_ex',
+            'getaddrinfo',
+            'gethostbyaddr',
+            'getnameinfo'
+    ):
+        locals()[method] = staticmethod(getattr(_socket, method))