Add python-eventlet 0.16.1

[packages/trusty/python-eventlet.git] / eventlet / eventlet / green / builtin.py

diff --git a/eventlet/eventlet/green/builtin.py b/eventlet/eventlet/green/builtin.py
new file mode 100644 (file)
index 0000000..3dd2c76
--- /dev/null
+++ b/eventlet/eventlet/green/builtin.py
@@ -0,0 +1,47 @@
+"""
+In order to detect a filehandle that's been closed, our only clue may be
+the operating system returning the same filehandle in response to some
+other  operation.
+
+The builtins 'file' and 'open' are patched to collaborate with the
+notify_opened protocol.
+"""
+
+builtins_orig = __builtins__
+
+from eventlet import hubs
+from eventlet.hubs import hub
+from eventlet.patcher import slurp_properties
+import sys
+
+__all__ = dir(builtins_orig)
+__patched__ = ['file', 'open']
+
+slurp_properties(builtins_orig, globals(),
+                 ignore=__patched__, srckeys=dir(builtins_orig))
+
+hubs.get_hub()
+
+__original_file = file
+
+
+class file(__original_file):
+    def __init__(self, *args, **kwargs):
+        super(file, self).__init__(*args, **kwargs)
+        hubs.notify_opened(self.fileno())
+
+__original_open = open
+__opening = False
+
+
+def open(*args):
+    global __opening
+    result = __original_open(*args)
+    if not __opening:
+        # This is incredibly ugly. 'open' is used under the hood by
+        # the import process. So, ensure we don't wind up in an
+        # infinite loop.
+        __opening = True
+        hubs.notify_opened(result.fileno())
+        __opening = False
+    return result