.

bigfile/_file_zodb.pyx

@@ -40,14 +40,14 @@ cdef extern from *:
     #include <wendelin/bigfile/file.h>
     #include <wendelin/bigfile/virtmem.h>
 
-    struct CXXPyBigFile {
+    struct cxxPyBigFile {
         PyObject pyobj;
         BigFile  file;
     };
     """
-    struct CXXPyBigFile:
+    struct cxxPyBigFile:
         pass
-    ctypedef extern class wendelin.bigfile._bigfile.BigFile[object CXXPyBigFile]:
+    ctypedef extern class wendelin.bigfile._bigfile.BigFile[object cxxPyBigFile]:
         pass
 
 from wcfs.internal cimport _wcfs as wcfs
@@ -83,3 +83,84 @@ cdef class _ZBigFile(BigFile):
     def loadblk(self, blk, buf):    return self.zself.loadblk(blk, buf)
     def storeblk(self, blk, buf):   return self.zself.storeblk(blk, buf)
     #def blkmmapper(self):           return self.zself.blkmmapper()
+
+    # blkmapper serves PyBigFile and gives it XXX ...
+    #
+    # it is called from PyBigFile.fileh_open(mmap_overlay=True) and .zfile
+    # should be already associaed with jar and have oid.
+    def blkmapper(_ZBigFile zf):
+        if zf.wconn == nil:
+            zconn = zf.zself._p_jar
+            assert zconn is not None
+            # XXX locking? or rely on that ZODB objects for must be used from under 1 thread only?
+            zf.foid = u64(zf.zself._p_oid)
+
+            # XXX join zconn to wconn
+            pywconn = pywconnOf(zconn)
+            zf.wconn = pywconn.XXX
+
+
+# functions that we give to virtmem bigfile_ops .mmap*
+cdef nogil:
+
+    void* virt_mmap_setup_read(VMA *vma, BigFile *file, blk_t blk, size_t blklen) {
+        FileH fileh; # XXX = ... somehow from file
+        Mapping mmap;
+        error err;
+
+        tie(mmap, err) = fileh->mmap(blk, blklen, vma);
+        if (err != nil)
+            panic("TODO");  # XXX
+
+        mmap->incref(); # vma->mmap_overlay_server is keeping ref to mmap
+        vma->mmap_overlay_server = mmap._ptr();
+
+        # XXX here? -> in fileh->mmap? don't set at all here?
+        vma->addr_start = (uintptr_t)mmap->mem_start;
+        vma->addr_stop  = (uintptr_t)mmap->mem_stop;
+
+        return (void*)vma->addr_start;  // XXX kill if we set vma->addr_*
+    }
+
+    int virt_remmap_blk_read(VMA *vma, BigFile *file, blk_t blk) {
+        _Mapping *mmap = static_cast<_Mapping*>(vma->mmap_overlay_server);
+        // XXX use file?
+
+        mmap->remmap_blk(blk);  // XXX err
+        return 0;
+    }
+
+
+    void virt_munmap(VMA *vma, BigFile *file) {
+        Mapping mmap = adoptref(static_cast<_Mapping*>(vma->mmap_overlay_server)); // NOTE taking 1 ref back
+        vma->mmap_overlay_server = NULL;
+
+        mmap->unmap();
+
+        // XXX close mmap->fileh
+    }
+
+
+
+
+# pywconnOf establishes and returns (py) wcfs.Conn associated with zconn.
+# XXX wconn is maintained and kept in sync with zconn.
+# XXX simultaneous call?
+# XXX move -> .py ?
+cdef pywconnOf(zconn):
+    assert isinstance(zconn, zodbConnection)
+    assert zconn.opened     # XXX needed
+
+    # XXX locking
+    wconn = getattr(zconn, '_wcfs_wconn', None)
+    if wconn is not None:
+        return wconn
+
+    # zconn is not yet associated with wconn
+    zstor = zconn.db().storage
+    zurl = wcfs.zstor_2zurl(zstor)
+    wc = wcfs.join(zurl)
+    wconn = wc.connect(zconn_at(zconn))
+
+    zconn._wcfs_wconn = wconn
+    return wconn

wcfs/internal/wcfs_virtmem.cpp

@@ -356,45 +356,6 @@ pair<Mapping, error> _FileH::mmap(int64_t blk_start, int64_t blk_len, VMA *vma)
     return make_pair(mmap, nil);
 }
 
-// functions that we give to virtmem bigfile_ops .mmap*
-void* virt_mmap_setup_read(VMA *vma, BigFile *file, blk_t blk, size_t blklen) {
-    FileH fileh; // XXX = ... somehow from file
-    Mapping mmap;
-    error err;
-
-    tie(mmap, err) = fileh->mmap(blk, blklen, vma);
-    if (err != nil)
-	panic("TODO");	// XXX
-
-    mmap->incref(); // vma->mmap_overlay_server is keeping ref to mmap
-    vma->mmap_overlay_server = mmap._ptr();
-
-    // XXX here? -> in fileh->mmap? don't set at all here?
-    vma->addr_start = (uintptr_t)mmap->mem_start;
-    vma->addr_stop  = (uintptr_t)mmap->mem_stop;
-
-    return (void*)vma->addr_start;  // XXX kill if we set vma->addr_*
-}
-
-int virt_remmap_blk_read(VMA *vma, BigFile *file, blk_t blk) {
-    _Mapping *mmap = static_cast<_Mapping*>(vma->mmap_overlay_server);
-    // XXX use file?
-
-    mmap->remmap_blk(blk);  // XXX err
-    return 0;
-}
-
-
-void virt_munmap(VMA *vma, BigFile *file) {
-    Mapping mmap = adoptref(static_cast<_Mapping*>(vma->mmap_overlay_server)); // NOTE taking 1 ref back
-    vma->mmap_overlay_server = NULL;
-
-    mmap->unmap();
-
-    // XXX close mmap->fileh
-}
-
-
 // resync resyncs connection and its mappings onto different database view.
 error _Conn::resync(zodb::Tid at) {
     _Conn& wconn = *this;