Clean up and restructure sources

src/ripple/basics/impl/CountedObject.cpp

@@ -0,0 +1,98 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2012, 2013 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <ripple/basics/CountedObject.h>
+
+namespace ripple {
+
+CountedObjects& CountedObjects::getInstance ()
+{
+    static CountedObjects instance;
+
+    return instance;
+}
+
+CountedObjects::CountedObjects ()
+    : m_count (0)
+    , m_head (nullptr)
+{
+}
+
+CountedObjects::~CountedObjects ()
+{
+}
+
+CountedObjects::List CountedObjects::getCounts (int minimumThreshold) const
+{
+    List counts;
+
+    // When other operations are concurrent, the count
+    // might be temporarily less than the actual count.
+    int const count = m_count.load ();
+
+    counts.reserve (count);
+
+    CounterBase* counter = m_head.load ();
+
+    while (counter != nullptr)
+    {
+        if (counter->getCount () >= minimumThreshold)
+        {
+            Entry entry;
+
+            entry.first = counter->getName ();
+            entry.second = counter->getCount ();
+
+            counts.push_back (entry);
+        }
+
+        counter = counter->getNext ();
+    }
+
+    return counts;
+}
+
+//------------------------------------------------------------------------------
+
+CountedObjects::CounterBase::CounterBase ()
+    : m_count (0)
+{
+    // Insert ourselves at the front of the lock-free linked list
+
+    CountedObjects& instance = CountedObjects::getInstance ();
+    CounterBase* head;
+
+    do
+    {
+        head = instance.m_head.load ();
+        m_next = head;
+    }
+    while (instance.m_head.exchange (this) != head);
+
+    ++instance.m_count;
+}
+
+CountedObjects::CounterBase::~CounterBase ()
+{
+    // VFALCO NOTE If the counters are destroyed before the singleton,
+    //             undefined behavior will result if the singleton's member
+    //             functions are called.
+}
+
+} // ripple