asyncio: sync with Tulip

* Tulip issue #183: log socket events in debug mode

  - Log most important socket events: socket connected, new client, connection
    reset or closed by peer (EOF), etc.
  - Log time elapsed in DNS resolution (getaddrinfo)
  - Log pause/resume reading
  - Log time of SSL handshake
  - Log SSL handshake errors
  - Add a __repr__() method to many classes

* Fix ProactorEventLoop() in debug mode. ProactorEventLoop._make_self_pipe()
  doesn't call call_soon() directly because it checks for the current loop
  which fails, because the method is called to build the event loop.

* Cleanup _ProactorReadPipeTransport constructor. Not need to set again
  _read_fut attribute to None, it is already done in the base class.

1 files changed, 12 insertions, 0 deletions

diff --git a/Lib/asyncio/windows_events.py b/Lib/asyncio/windows_events.py
index 93b71b2..9d86c96 100644
--- a/Lib/asyncio/windows_events.py
+++ b/Lib/asyncio/windows_events.py
@@ -40,6 +40,18 @@ class _OverlappedFuture(futures.Future):
         super().__init__(loop=loop)
         self.ov = ov
 
+    def __repr__(self):
+        info = [self._state.lower()]
+        if self.ov.pending:
+            info.append('overlapped=pending')
+        else:
+            info.append('overlapped=completed')
+        if self._state == futures._FINISHED:
+            info.append(self._format_result())
+        if self._callbacks:
+            info.append(self._format_callbacks())
+        return '<%s %s>' % (self.__class__.__name__, ' '.join(info))
+
     def cancel(self):
         try:
             self.ov.cancel()