journal: simplified commit position tracking

Now the journal player and recorder will allocate a tid to represent
the associated journal entry.  The order of these allocations are
tracked so that the commit position can be moved only when all prior
commits are safely on disk.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/journal/Future.h b/src/journal/Future.h
index 88ad436ef2f..dbc7d4d6877 100644
--- a/src/journal/Future.h
+++ b/src/journal/Future.h
@@ -34,8 +34,13 @@ public:
   int get_return_value() const;
 
 private:
+  friend class Journaler;
   friend std::ostream& operator<<(std::ostream&, const Future&);
 
+  inline FutureImplPtr get_future_impl() const {
+    return m_future_impl;
+  }
+
   FutureImplPtr m_future_impl;
 };