Fleshed out tpool tests, including a benchmark that evaluates how much overhead execute() adds. Fixed up tpool itself to pass the tests.

eventlet/tpool.py

@@ -26,6 +26,13 @@ from Queue import Empty, Queue
 from eventlet import api, coros, greenio
 from eventlet.api import trampoline, get_hub
 
+try:
+    set
+except NameError:  # python 2.3 compatibility
+    from sets import Set as set
+
+QUIET=False
+
 _rpipe, _wpipe = os.pipe()
 _rfile = os.fdopen(_rpipe,"r",0)
 ## Work whether or not wrap_pipe_with_coroutine_pipe was called
@@ -81,8 +88,9 @@ def erecv(e):
     if isinstance(rv,tuple) and len(rv) == 4 and isinstance(rv[0],Exception):
         import sys, traceback
         (e,a,b,tb) = rv
-        traceback.print_exception(Exception,e,tb)
-        traceback.print_stack()
+        if not QUIET:
+            traceback.print_exception(Exception,e,tb)
+            traceback.print_stack()
         raise e
     return rv
 
@@ -100,6 +108,21 @@ erpc = execute
 
 
 
+def proxy_call(autowrap, f, *args, **kwargs):
+    """ Call a function *f* and returns the value.  If the type of the
+    return value is in the *autowrap* collection, then it is wrapped in
+    a Proxy object before return.  Normally *f* will be called
+    nonblocking with the execute method; if the keyword argument
+    "nonblocking" is set to true, it will simply be executed directly."""
+    if kwargs.pop('nonblocking',False):
+        rv = f(*args, **kwargs)
+    else:
+        rv = execute(f,*args,**kwargs)
+    if type(rv) in autowrap:
+        return Proxy(rv, autowrap)
+    else:
+        return rv
+
 class Proxy(object):
     """ a simple proxy-wrapper of any object that comes with a methods-only interface,
     in order to forward every method invocation onto a thread in the native-thread pool.
@@ -109,7 +132,7 @@ class Proxy(object):
     def __init__(self, obj,autowrap=()):
         self._obj = obj
         if isinstance(autowrap, (list, tuple)):
-            autowrap = dict([(x, True) for x in autowrap])
+            autowrap = set(autowrap)
         self._autowrap = autowrap
 
     def __getattr__(self,attr_name):
@@ -117,16 +140,35 @@ class Proxy(object):
         if not callable(f):
             return f
         def doit(*args, **kwargs):
-            if kwargs.pop('nonblocking',False):
-                rv = f(*args, **kwargs)
-            else:
-                rv = execute(f,*args,**kwargs)
-            if type(rv) in self._autowrap:
-                return Proxy(rv, self._autowrap)
-            else:
-                return rv
+            return proxy_call(self._autowrap, f, *args, **kwargs)
         return doit
 
+    # the following are a buncha methods that the python interpeter
+    # doesn't use getattr to retrieve and therefore have to be defined
+    # explicitly
+    def __getitem__(self, key):
+        return proxy_call(self._autowrap, self._obj.__getitem__, key)        
+    def __setitem__(self, key, value):
+        return proxy_call(self._autowrap, self._obj.__setitem__, key, value)
+    def __deepcopy__(self, memo=None):
+        return proxy_call(self._autowrap, self._obj.__deepcopy__, memo)
+    def __copy__(self, memo=None):
+        return proxy_call(self._autowrap, self._obj.__copy__, memo)
+    # these don't go through a proxy call, because they're likely to
+    # be called often, and are unlikely to be implemented on the
+    # wrapped object in such a way that they would block
+    def __eq__(self, rhs):
+        return self._obj.__eq__(rhs)
+    def __repr__(self):
+        return self._obj.__repr__()
+    def __str__(self):
+        return self._obj.__str__()
+    def __len__(self):
+        return len(self._obj)
+    def __nonzero__(self):
+        return bool(self._obj)
+    
+
 
 _nthreads = int(os.environ.get('EVENTLET_THREADPOOL_SIZE', 20))
 _threads = {}