diff base/HitCount.h @ 1256:d8d6d01505ed 3.0-integration

Print out cache hit/miss counts

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/base/HitCount.h	Wed Nov 09 18:08:40 2016 +0000
@@ -0,0 +1,68 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef HIT_COUNT_H
+#define HIT_COUNT_H
+
+#include <string>
+#include <iostream>
+
+/**
+ * Profile class for counting cache hits and the like.
+ */
+class HitCount
+{
+public:
+    HitCount(std::string name) :
+	m_name(name),
+	m_hit(0),
+	m_partial(0),
+	m_miss(0)
+    { }
+    
+    ~HitCount() {
+	using namespace std;
+	int total = m_hit + m_partial + m_miss;
+	cerr << "Hit count: " << m_name << ": ";
+	if (m_partial > 0) {
+	    cerr << m_hit << " hits, " << m_partial << " partial, "
+		 << m_miss << " misses";
+	} else {
+	    cerr << m_hit << " hits, " << m_miss << " misses";
+	}
+	if (total > 0) {
+	    if (m_partial > 0) {
+		cerr << " (" << ((m_hit * 100.0) / total) << "%, "
+		     << ((m_partial * 100.0) / total) << "%, "
+		     << ((m_miss * 100.0) / total) << "%)";
+	    } else {
+		cerr << " (" << ((m_hit * 100.0) / total) << "%, "
+		     << ((m_miss * 100.0) / total) << "%)";
+	    }
+	}
+	cerr << endl;
+    }
+
+    void hit() { ++m_hit; }
+    void partial() { ++m_partial; }
+    void miss() { ++m_miss; }
+
+private:
+    std::string m_name;
+    int m_hit;
+    int m_partial;
+    int m_miss;
+};
+
+#endif