.

wcfs/internal/_wcfs.pyx

@@ -25,6 +25,7 @@
 
 from libcpp cimport nullptr_t, nullptr as nil
 from libcpp.string cimport string
+from libcpp.utility cimport pair
 cdef extern from *:
     ctypedef bint cbool "bool"
 
@@ -36,16 +37,31 @@ cdef extern from "wcfs_misc.h" nogil:
         cbool operator==(const error&)  const
         cbool operator!=(const error&)  const
 
+
 cdef extern from "wcfs_watchlink.h" nogil:
     cppclass WatchLink:
         error close()
 
+ctypedef WatchLink *pWatchLink # https://github.com/cython/cython/issues/534
+
+cdef extern from "wcfs.h" nogil:
+    cppclass WCFS:
+        pair[pWatchLink, error] _openwatch()    # XXX pair instead of tuple
+
+
 from golang cimport topyexc
 
+cdef class PyWCFS:
+    cdef WCFS *wc
+
 
 cdef class PyWatchLink:
     cdef WatchLink *wlink
 
+    def __xinit__(PyWatchLink pywlink, PyWCFS pywc):
+        _ = wcfs_openwatch_pyexc(pywc.wc)
+        # XXX
+
     def close(PyWatchLink pywlink):
         with nogil:
             err = wlink_close_pyexc(pywlink.wlink)
@@ -63,5 +79,8 @@ cdef class PyPinReq:
 
 cdef nogil:
 
-    error wlink_close_pyexc(WatchLink *wlink)           except +topyexc:
+    error wlink_close_pyexc(WatchLink *wlink)                   except +topyexc:
         return wlink.close()
+
+    pair[pWatchLink, error] wcfs_openwatch_pyexc(WCFS *wcfs)    except +topyexc:
+        return wcfs._openwatch()