Update to Tornado 3.0

libs/tornado/process.py

@@ -14,7 +14,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-"""Utilities for working with multiple processes."""
+"""Utilities for working with multiple processes, including both forking
+the server into multiple processes and managing subprocesses.
+"""
 
 from __future__ import absolute_import, division, print_function, with_statement
 
@@ -169,8 +171,8 @@ class Subprocess(object):
     additions:
 
     * ``stdin``, ``stdout``, and ``stderr`` may have the value
-      `tornado.process.Subprocess.STREAM`, which will make the corresponding
-      attribute of the resulting Subprocess a `PipeIOStream`.
+      ``tornado.process.Subprocess.STREAM``, which will make the corresponding
+      attribute of the resulting Subprocess a `.PipeIOStream`.
     * A new keyword argument ``io_loop`` may be used to pass in an IOLoop.
     """
     STREAM = object()
@@ -229,15 +231,15 @@ class Subprocess(object):
     def initialize(cls, io_loop=None):
         """Initializes the ``SIGCHILD`` handler.
 
-        The signal handler is run on an IOLoop to avoid locking issues.
-        Note that the IOLoop used for signal handling need not be the
+        The signal handler is run on an `.IOLoop` to avoid locking issues.
+        Note that the `.IOLoop` used for signal handling need not be the
         same one used by individual Subprocess objects (as long as the
-        IOLoops are each running in separate threads).
+        ``IOLoops`` are each running in separate threads).
         """
         if cls._initialized:
             return
         if io_loop is None:
-            io_loop = ioloop.IOLoop.instance()
+            io_loop = ioloop.IOLoop.current()
         cls._old_sigchld = signal.signal(
             signal.SIGCHLD,
             lambda sig, frame: io_loop.add_callback_from_signal(cls._cleanup))