From bfa3908a99f58aac24f0e4887fae62640c4a9f23 Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Sat, 30 Sep 2017 20:11:15 +0200
Subject: [PATCH] Ref T129, utility function for timestamp based interface

---
 src/blackmisc/timestampbased.cpp | 6 ++++++
 src/blackmisc/timestampbased.h   | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/src/blackmisc/timestampbased.cpp b/src/blackmisc/timestampbased.cpp
index a7c18b827..ee2125732 100644
--- a/src/blackmisc/timestampbased.cpp
+++ b/src/blackmisc/timestampbased.cpp
@@ -126,6 +126,12 @@ namespace BlackMisc
         return dt > 0 ? dt : dt * -1;
     }
 
+    qint64 ITimestampBased::msecsToNow() const
+    {
+        if (this->m_timestampMSecsSinceEpoch < 0) return QDateTime::currentMSecsSinceEpoch();
+        return QDateTime::currentMSecsSinceEpoch() - this->m_timestampMSecsSinceEpoch;
+    }
+
     void ITimestampBased::setCurrentUtcTime()
     {
         this->m_timestampMSecsSinceEpoch = QDateTime::currentMSecsSinceEpoch();
diff --git a/src/blackmisc/timestampbased.h b/src/blackmisc/timestampbased.h
index 4cd1fad35..3bad7a44d 100644
--- a/src/blackmisc/timestampbased.h
+++ b/src/blackmisc/timestampbased.h
@@ -80,6 +80,9 @@ namespace BlackMisc
         //! Time difference
         qint64 absMsecsTo(const ITimestampBased &otherTimestampObj) const;
 
+        //! Milliseconds to now
+        qint64 msecsToNow() const;
+
         //! Set the current time as timestamp
         void setCurrentUtcTime();