cython: use void* instead of object to avoid additional unnecessary...

cython: use void* instead of object to avoid additional unnecessary incref/decref; also use xdecref where makes sense

gevent/core.pyx

@@ -50,8 +50,9 @@ cdef extern from "sys/types.h":
     ctypedef unsigned char u_char
 
 cdef extern from "Python.h":
-    void   Py_INCREF(object o)
-    void   Py_DECREF(object o)
+    void   Py_INCREF(void* o)
+    void   Py_DECREF(void* o)
+    void   Py_XDECREF(void* o)
     object PyString_FromStringAndSize(char *v, int len)
     object PyString_FromString(char *v)
 
@@ -163,12 +164,12 @@ cdef class event:
 
     cdef _addref(self):
         if self._incref <= 0:
-            Py_INCREF(self)
+            Py_INCREF(<void*>self)
             self._incref += 1
 
     cdef _delref(self):
         if self._incref > 0:
-            Py_DECREF(self)
+            Py_DECREF(<void*>self)
             self._incref -= 1
 
     property pending:
@@ -461,18 +462,15 @@ include "evhttp.pxi"
 
 def set_exc_info(object type, object value):
     cdef PyThreadState* tstate = PyThreadState_GET()
-    if tstate.exc_type != NULL:
-        Py_DECREF(<object>tstate.exc_type)
-    if tstate.exc_value != NULL:
-        Py_DECREF(<object>tstate.exc_value)
-    if tstate.exc_traceback != NULL:
-        Py_DECREF(<object>tstate.exc_traceback)
+    Py_XDECREF(tstate.exc_type)
+    Py_XDECREF(tstate.exc_value)
+    Py_XDECREF(tstate.exc_traceback)
     if value is None:
         tstate.exc_type = NULL
         tstate.exc_value = NULL
     else:
-        Py_INCREF(type)
-        Py_INCREF(value)
+        Py_INCREF(<void*>type)
+        Py_INCREF(<void*>value)
         tstate.exc_type = <void*>type
         tstate.exc_value = <void *>value
     tstate.exc_traceback = NULL

gevent/evdns.pxi

@@ -56,7 +56,7 @@ def dns_err_to_string(int err):
 cdef void __evdns_callback(int code, char type, int count, int ttl, void *addrs, void *arg) with gil:
     cdef int i
     cdef object callback = <object>arg
-    Py_DECREF(callback)
+    Py_DECREF(<void*>callback)
     cdef object addr
     cdef object result
 
@@ -91,7 +91,7 @@ def dns_resolve_ipv4(char *name, int flags, object callback):
     cdef int result = evdns_resolve_ipv4(name, flags, __evdns_callback, <void *>callback)
     if result:
         raise IOError('evdns_resolve_ipv4(%r, %r) returned %s' % (name, flags, result, ))
-    Py_INCREF(callback)
+    Py_INCREF(<void*>callback)
 
 
 def dns_resolve_ipv6(char *name, int flags, object callback):
@@ -104,7 +104,7 @@ def dns_resolve_ipv6(char *name, int flags, object callback):
     cdef int result = evdns_resolve_ipv6(name, flags, __evdns_callback, <void *>callback)
     if result:
         raise IOError('evdns_resolve_ip6(%r, %r) returned %s' % (name, flags, result, ))
-    Py_INCREF(callback)
+    Py_INCREF(<void*>callback)
 
 
 def dns_resolve_reverse(char* packed_ip, int flags, object callback):
@@ -117,7 +117,7 @@ def dns_resolve_reverse(char* packed_ip, int flags, object callback):
     cdef int result = evdns_resolve_reverse(<void *>packed_ip, flags, __evdns_callback, <void *>callback)
     if result:
         raise IOError('evdns_resolve_reverse(%r, %r) returned %s' % (packed_ip, flags, result, ))
-    Py_INCREF(callback)
+    Py_INCREF(<void*>callback)
 
 
 def dns_resolve_reverse_ipv6(char* packed_ip, int flags, object callback):
@@ -130,4 +130,4 @@ def dns_resolve_reverse_ipv6(char* packed_ip, int flags, object callback):
     cdef int result = evdns_resolve_reverse_ipv6(<void *>packed_ip, flags, __evdns_callback, <void *>callback)
     if result:
         raise IOError('evdns_resolve_reverse_ipv6(%r, %r) returned %s' % (packed_ip, flags, result, ))
-    Py_INCREF(callback)
+    Py_INCREF(<void*>callback)

gevent/evhttp.pxi

@@ -485,12 +485,12 @@ cdef class http_request_client(http_request_base):
 
     cdef _addref(self):
         if self._incref <= 0:
-            Py_INCREF(self)
+            Py_INCREF(<void*>self)
             self._incref += 1
 
     cdef _delref(self):
         if self._incref > 0:
-            Py_DECREF(self)
+            Py_DECREF(<void*>self)
             self._incref -= 1
         self.callback = None