misc: add callback hooks and refactor pmc

Callbacks for monitoring and performance measurement:
- Add new callback list type, with context
- Add callbacks for API, CLI, and barrier sync
- Modify node dispatch callback to pass plugin-specific context
- Modify perfmon plugin to keep PMC samples local to the plugin
- Include process nodes in dispatch callback
- Pass dispatch function return value to callback

Type: refactor

Signed-off-by: Tom Seidenberg <tseidenb@cisco.com>
Change-Id: I28b06c58490611e08d76ff5b01b2347ba2109b22

1 files changed, 7 insertions, 1 deletions

diff --git a/src/vlibapi/api_common.h b/src/vlibapi/api_common.h
index 86b1c5ac3ee..915ddabaca1 100644
--- a/src/vlibapi/api_common.h
+++ b/src/vlibapi/api_common.h
@@ -224,7 +224,7 @@ typedef struct
 } api_version_t;
 
 /** API main structure, used by both vpp and binary API clients */
-typedef struct
+typedef struct api_main_t
 {
   /** Message handler vector  */
   void (**msg_handlers) (void *);
@@ -374,6 +374,12 @@ typedef struct
   elog_main_t *elog_main;
   int elog_trace_api_messages;
 
+  /** performance counter callback **/
+  void (**perf_counter_cbs)
+    (struct api_main_t *, u32 id, int before_or_after);
+  void (**perf_counter_cbs_tmp)
+    (struct api_main_t *, u32 id, int before_or_after);
+
 } api_main_t;
 
 extern __thread api_main_t *my_api_main;