* apt-pkg/contrib/weakptr.h:

  - add a class WeakPointable which allows one to register weak pointers to
    an object which will be set to NULL when the object is deallocated.
* [ABI break] apt-pkg/acquire{-worker,-item,}.h:
  - subclass pkgAcquire::{Worker,Item,ItemDesc} from WeakPointable.

1 files changed, 2 insertions, 1 deletions

diff --git a/apt-pkg/acquire.h b/apt-pkg/acquire.h
index 9e91a9f67..8e2c21151 100644
--- a/apt-pkg/acquire.h
+++ b/apt-pkg/acquire.h
@@ -67,6 +67,7 @@
 #define PKGLIB_ACQUIRE_H
 
 #include <apt-pkg/macros.h>
+#include <apt-pkg/weakptr.h>
 
 #include <vector>
 #include <string>
@@ -376,7 +377,7 @@ class pkgAcquire
  *
  *  An item may have several assocated ItemDescs over its lifetime.
  */
-struct pkgAcquire::ItemDesc
+struct pkgAcquire::ItemDesc : public WeakPointable
 {
    /** \brief The URI from which to download this item. */
    string URI;