From d8b70727fdda5c1de19736724809e76e060b417e Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 18 Aug 2010 17:49:47 +0200
Subject: Add callback support for zero counter event in shared_base

---
 odb/shared-ptr/base.hxx | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'odb/shared-ptr/base.hxx')

diff --git a/odb/shared-ptr/base.hxx b/odb/shared-ptr/base.hxx
index 6fdc32e..4766aa7 100644
--- a/odb/shared-ptr/base.hxx
+++ b/odb/shared-ptr/base.hxx
@@ -68,8 +68,19 @@ namespace odb
     void
     operator delete (void*) throw ();
 
+    struct refcount_callback
+    {
+      void* arg;
+      void (*zero_counter) (void*);
+    };
+
+  private:
+    bool
+    _dec_ref_callback ();
+
   protected:
     std::size_t counter_;
+    refcount_callback* callback_;
   };
 
   template <typename X>
-- 
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