From df07e47d24fa8ff376eba5f832eb9a4e295950f5 Mon Sep 17 00:00:00 2001
From: David Wilson <dw@botanicus.net>
Date: Wed, 14 Feb 2018 19:36:00 +0545
Subject: [PATCH] core: de-munge Message.unpickle() vs. Receiver.get().

---
 mitogen/core.py   | 31 +++++++++++++++----------------
 mitogen/master.py |  6 ++----
 2 files changed, 17 insertions(+), 20 deletions(-)

diff --git a/mitogen/core.py b/mitogen/core.py
index 17f4482b..6c58da16 100644
--- a/mitogen/core.py
+++ b/mitogen/core.py
@@ -254,17 +254,27 @@ class Message(object):
             self.data = cPickle.dumps(CallError(e), protocol=2)
         return self
 
-    def unpickle(self):
+    def unpickle(self, throw=True):
         """Deserialize `data` into an object."""
         IOLOG.debug('%r.unpickle()', self)
         fp = cStringIO.StringIO(self.data)
         unpickler = cPickle.Unpickler(fp)
         unpickler.find_global = self._find_global
+
         try:
-            return unpickler.load()
+            # Must occur off the broker thread.
+            obj = unpickler.load()
         except (TypeError, ValueError), ex:
             raise StreamError('invalid message: %s', ex)
 
+        if throw:
+            if obj == _DEAD:
+                raise ChannelError(ChannelError.remote_msg)
+            if isinstance(obj, CallError):
+                raise obj
+
+        return obj
+
     def __repr__(self):
         return 'Message(%r, %r, %r, %r, %r, %r..%d)' % (
             self.dst_id, self.src_id, self.auth_id, self.handle,
@@ -358,19 +368,7 @@ class Receiver(object):
 
         if msg == _DEAD:
             raise ChannelError(ChannelError.local_msg)
-
-        # Must occur off the broker thread.
-        data = msg.unpickle()
-        if data == _DEAD and self.raise_channelerror:
-            raise ChannelError(ChannelError.remote_msg)
-
-        if isinstance(data, CallError):
-            raise data
-
-        return msg, data
-
-    def get_data(self, timeout=None):
-        return self.get(timeout)[1]
+        return msg
 
     def __iter__(self):
         while True:
@@ -1230,7 +1228,8 @@ class ExternalContext(object):
             fp.close()
 
     def _dispatch_calls(self):
-        for msg, data in self.channel:
+        for msg in self.channel:
+            data = msg.unpickle(throw=False)
             LOG.debug('_dispatch_calls(%r)', data)
             if msg.src_id not in mitogen.parent_ids:
                 LOG.warning('CALL_FUNCTION from non-parent %r', msg.src_id)
diff --git a/mitogen/master.py b/mitogen/master.py
index 3f79cecf..236127e9 100644
--- a/mitogen/master.py
+++ b/mitogen/master.py
@@ -564,17 +564,15 @@ class Context(mitogen.core.Context):
         else:
             klass = None
 
-        recv = self.send_async(
+        return self.send_async(
             mitogen.core.Message.pickled(
                 (fn.__module__, klass, fn.__name__, args, kwargs),
                 handle=mitogen.core.CALL_FUNCTION,
             )
         )
-        recv.raise_channelerror = False
-        return recv
 
     def call(self, fn, *args, **kwargs):
-        return self.call_async(fn, *args, **kwargs).get_data()
+        return self.call_async(fn, *args, **kwargs).get().unpickle()
 
 
 class Router(mitogen.parent.Router):