Initial step towards callbacks support

This commit introduces generic (all target languages) support for
callbacks.

Callbacks are sent to a 'callback object instance' which must be
instantiated.
Currently implemented are commit callbacks, requiring an instance
of 'CommitCallbacks'

** this is work in progress **

Next: Provide example code and tests for Python and Ruby

1 files changed, 33 insertions, 0 deletions

diff --git a/swig/CommitCallbacks.h b/swig/CommitCallbacks.h
new file mode 100644
index 0000000..e02cb73
--- /dev/null
+++ b/swig/CommitCallbacks.h
@@ -0,0 +1,33 @@
+class CommitCallbacks {
+
+  private:
+    PatchMessageReportReceiver _messageReceiver;
+    PatchScriptReportReceiver _scriptReceiver;
+    RemoveResolvableReportReceiver _installReceiver;
+    InstallResolvableReportReceiver _removeReceiver;
+
+    Target_Type _instance;
+  public:
+    CommitCallbacks(Target_Type instance)
+      : _messageReceiver(instance)
+      , _scriptReceiver(instance)
+      , _installReceiver(instance)
+      , _removeReceiver(instance)
+    {
+      _instance = instance;
+      Target_INCREF(_instance);
+      _messageReceiver.connect();
+      _scriptReceiver.connect();
+      _installReceiver.connect();
+      _removeReceiver.connect();
+    }
+
+    ~CommitCallbacks()
+    {
+      _removeReceiver.disconnect();
+      _installReceiver.disconnect();
+      _scriptReceiver.disconnect();
+      _messageReceiver.disconnect();
+      Target_DECREF(_instance);
+    }
+};