X teach cython to resolve `cimport wendelin.*` starting from top-level

No need to manually do `ln -s . wendelin && touch __init__.py` to build
it anymore.

setup.py

@@ -28,6 +28,20 @@ from subprocess import Popen, PIPE
 import os
 import sys
 
+
+# tell cython to resolve `cimport wendelin.*` modules hierarcy starting at top-level.
+# see wendelin.py for details.
+# XXX hack
+from Cython.Compiler.Main import Context as CyContext
+cy_search_inc_dirs = CyContext.search_include_directories
+def wendelin_cy_searh_in_dirs(self, qualified_name, suffix, pos, include=False, sys_path=False):
+    _ = qualified_name.split('.')
+    if len(_) >= 1 and _[0] == "wendelin":
+        qualified_name = '.'.join(_[1:])
+    return cy_search_inc_dirs(self, qualified_name, suffix, pos, include, sys_path)
+CyContext.search_include_directories = wendelin_cy_searh_in_dirs
+
+
 os.environ['CFLAGS']    = '-g -O0' # XXX temp
 os.environ['CXXFLAGS']  = '-g -O0' # XXX temp
 

wcfs/client/wcfs.cpp

@@ -153,6 +153,9 @@
 //      - fileh.mu (R:.mmaps W:.pinned)
 //
 //      - virt_lock
+//
+//
+// XXX note on virt_lock in pinner and deadlocks.
 
 
 #include "wcfs_misc.h"