Context: add GenContext templated on the callback argument

Signed-off-by: Samuel Just <sam.just@inktank.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/include/Context.h b/src/include/Context.h
index 9ec4414a047..663313ceec1 100644
--- a/src/include/Context.h
+++ b/src/include/Context.h
@@ -28,6 +28,26 @@
 #define mydout(cct, v) lgeneric_subdout(cct, context, v)
 
 /*
+ * GenContext - abstract callback class
+ */
+template <typename T>
+class GenContext {
+  GenContext(const GenContext& other);
+  const GenContext& operator=(const GenContext& other);
+
+ protected:
+  virtual void finish(T t) = 0;
+
+ public:
+  GenContext() {}
+  virtual ~GenContext() {}       // we want a virtual destructor!!!
+  virtual void complete(T t) {
+    finish(t);
+    delete this;
+  }
+};
+
+/*
  * Context - abstract callback class
  */
 class Context {