From c0b69e4e6fa58db42efc13f115ff9fdae8d0ad48 Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@gmail.com>
Date: Fri, 5 Feb 2016 12:28:59 -0500
Subject: [PATCH] add monitor buffer statistics

to help answer the question of why no monitorEvent()s
are happening.
---
 src/monitor/pv/monitor.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/monitor/pv/monitor.h b/src/monitor/pv/monitor.h
index 6d1312e..54ac1d1 100644
--- a/src/monitor/pv/monitor.h
+++ b/src/monitor/pv/monitor.h
@@ -80,6 +80,16 @@ class epicsShareClass Monitor : public Destroyable{
      * @param monitorElement
      */
     virtual void release(MonitorElementPtr const & monitorElement) = 0;
+
+    struct Stats {
+        size_t nfilled; //!< # of elements ready to be poll()d
+        size_t noutstanding; //!< # of elements poll()d but not released()d
+        size_t nempty; //!< # of elements available for new remote data
+    };
+
+    virtual void getStats(Stats& s) const {
+        s.nfilled = s.noutstanding = s.nempty = 0;
+    }
 };