.

bigfile/file_zodb.cpp

@@ -25,10 +25,10 @@
 #include "wendelin/bigfile/virtmem.h"
 #include "bigfile/_bigfile.h"
 #include "bigfile/_file_zodb.h"
+#include <ccan/container_of/container_of.h>
 
 static void* zfile_mmap_setup_read(VMA *vma, BigFile *file, blk_t blk, size_t blklen) {
-    //_ZBigFile* _zfile = static_cast<_ZBigFile*>(file);
-    _ZBigFile* _zfile = NULL;   // XXX
+    _ZBigFile* _zfile = container_of(file, _ZBigFile, __pyx_base.file);
 
     wcfs::FileH fileh = _zfile->wfileh;
     wcfs::Mapping mmap;