vom: Add support for new stats

This patch deprecates old stats and adds support for
new stats.

This implements the PULL design where client will enable
stats on objects (i.e. interfaces, etc), register a call
back function which will run once stats will be ready for
enabled object and call HW::read_stats() periodically to
read stats for enabled objects from VPP.

Change-Id: I32525a417427be87408d01f8bc93a731602ff690
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/extras/vom/vom/hw.hpp b/extras/vom/vom/hw.hpp
index 9ba47505619..d10a93aa59b 100644
--- a/extras/vom/vom/hw.hpp
+++ b/extras/vom/vom/hw.hpp
@@ -29,6 +29,7 @@
 
 namespace VOM {
 
+class stat_reader;
 class cmd;
 class HW
 {
@@ -287,6 +288,12 @@ public:
   static void init(cmd_q* f);
 
   /**
+   * Initialise the HW connection to VPP - the UT version passing
+   * a mock Q.
+   */
+  static void init(cmd_q* f, stat_reader* s);
+
+  /**
    * Initialise the HW
    */
   static void init();
@@ -326,6 +333,11 @@ public:
    */
   static bool poll();
 
+  /**
+   * read stats from stat segment
+   */
+  static void read_stats();
+
 private:
   /**
    * The command Q toward HW
@@ -333,6 +345,11 @@ private:
   static cmd_q* m_cmdQ;
 
   /**
+   * The stat reader toward HW
+   */
+  static stat_reader* m_statReader;
+
+  /**
    * HW::item representing the connection state as determined by polling
    */
   static HW::item<bool> m_poll_state;