Fix bug with IOLoop's 'waker' pipe which rendered it ineffective on linux

and mac (where pipes are unidirectional) and caused high cpu usage
on solaris (where pipes are bidirectional).  Thanks to Jari Ahonen for
finding the bug.

diff --git a/tornado/ioloop.py b/tornado/ioloop.py
index aabf5118aebc58de9b366f7de1c4db1fe3c9a55b..b2a105673fa13579886726f99928460e74976b1c 100644 (file)
--- a/tornado/ioloop.py
+++ b/tornado/ioloop.py
@@ -99,7 +99,7 @@ class IOLoop(object):
         self._set_close_exec(w)
         self._waker_reader = os.fdopen(r, "r", 0)
         self._waker_writer = os.fdopen(w, "w", 0)
-        self.add_handler(r, self._read_waker, self.WRITE)
+        self.add_handler(r, self._read_waker, self.READ)
 
     @classmethod
     def instance(cls):