.

bigfile/_file_zodb.pyx

@@ -107,7 +107,10 @@ cdef public class _ZBigFile(BigFile) [object _ZBigFile, type _ZBigFile_Type]:
 # functions that we give to virtmem bigfile_ops .mmap*
 cdef extern from * nogil:
     """
+    #include "bigfile/_file_zodb.h"
+
     void* virt_mmap_setup_read(VMA *vma, BigFile *file, blk_t blk, size_t blklen) {
+        _ZBigFile* _zfile = static_cast<_ZBigFile*>(file);
         wcfs::FileH fileh; // XXX = ... somehow from file
         wcfs::Mapping mmap;
         error err;