1 files changed, 58 insertions, 0 deletions
diff --git a/src/common/histogram.cc b/src/common/histogram.cc
new file mode 100644
index 00000000..b8a71b67
--- /dev/null
+++ b/src/common/histogram.cc
@@ -0,0 +1,58 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#include "common/histogram.h"
+#include "common/Formatter.h"
+
+// -- pow2_hist_t --
+void pow2_hist_t::dump(Formatter *f) const
+{
+  f->open_array_section("histogram");
+  for (std::vector<int32_t>::const_iterator p = h.begin(); p != h.end(); ++p)
+    f->dump_int("count", *p);
+  f->close_section();
+  f->dump_int("upper_bound", upper_bound());
+}
+
+void pow2_hist_t::encode(bufferlist& bl) const
+{
+  ENCODE_START(1, 1, bl);
+  encode(h, bl);
+  ENCODE_FINISH(bl);
+}
+
+void pow2_hist_t::decode(bufferlist::const_iterator& p)
+{
+  DECODE_START(1, p);
+  decode(h, p);
+  DECODE_FINISH(p);
+}
+
+void pow2_hist_t::generate_test_instances(std::list<pow2_hist_t*>& ls)
+{
+  ls.push_back(new pow2_hist_t);
+  ls.push_back(new pow2_hist_t);
+  ls.back()->h.push_back(1);
+  ls.back()->h.push_back(3);
+  ls.back()->h.push_back(0);
+  ls.back()->h.push_back(2);
+}
+
+void pow2_hist_t::decay(int bits)
+{
+  for (std::vector<int32_t>::iterator p = h.begin(); p != h.end(); ++p) {
+    *p >>= bits;
+  }
+  _contract();
+}