.

wcfs/internal/_wcfs.pxd

@@ -85,11 +85,13 @@ cdef extern from "wcfs/internal/wcfs.h" namespace "wcfs" nogil:
     cppclass _Conn:
         pair[FileH, error]  open(Oid foid)
         error               close()
+        error               resync(Tid at)
 
     cppclass Conn (refptr[_Conn]):
         # Conn.X = Conn->X in C++
         pair[FileH, error]  open        "_ptr()->open"      (Oid foid)
         error               close       "_ptr()->close"     ()
+        error               resync      "_ptr()->resync"    (Tid at)
 
     cppclass _FileH:
         # XXX add mmap?

wcfs/internal/_wcfs.pyx

@@ -86,7 +86,13 @@ cdef class PyConn:
         pywfileh.wfileh = wfileh
         return pywfileh
 
-    # XXX resync
+    def resync(PyConn pywconn, pyat):
+        cdef Tid at = u64(at)
+        with nogil:
+            err = wconn_resync_pyexc(pywconn.wconn, at)
+        if err != nil:
+            raise pyerr(err)
+
 
 cdef class PyFileH:
 
@@ -227,6 +233,9 @@ cdef nogil:
     pair[FileH, error] wconn_open_pyexc(Conn wconn, Oid foid)   except +topyexc:
         return wconn.open(foid)
 
+    error wconn_resync_pyexc(Conn wconn, Tid at)                except +topyexc:
+        return wconn.resync(at)
+
     error wlink_close_pyexc(WatchLink wlink)                    except +topyexc:
         return wlink.close()