add killthread function, make Task killable; Task daemonizes per default

modman/killthread.py

@@ -0,0 +1,23 @@
+import ctypes
+
+set_async_exc = ctypes.pythonapi.PyThreadState_SetAsyncExc
+
+
+def killthread(thread, exc=KeyboardInterrupt):
+    if not thread.is_alive():
+        return
+
+    ident = ctypes.c_long(thread.ident)
+    exc = ctypes.py_object(exc)
+
+    res = set_async_exc(ident, exc)
+    if res == 0:
+        raise ValueError("thread id does not exist")
+    elif res > 1:
+        # if return value is greater than one, you are in trouble.
+        # you should call it again with exc=NULL to revert the effect.
+        set_async_exc(ident, None)
+        raise SystemError("PyThreadState_SetAsyncExc failed")
+
+
+