Adding nsync for NLSR
diff --git a/nsync/src/sync-interest-table.cc b/nsync/src/sync-interest-table.cc
new file mode 100644
index 0000000..a378950
--- /dev/null
+++ b/nsync/src/sync-interest-table.cc
@@ -0,0 +1,123 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ * Chaoyi Bian <bcy@pku.edu.cn>
+ * Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#include "sync-interest-table.h"
+#include "sync-logging.h"
+using namespace std;
+
+INIT_LOGGER ("SyncInterestTable");
+
+namespace Sync
+{
+
+SyncInterestTable::SyncInterestTable (boost::asio::io_service& io, ndn::time::Duration lifetime)
+ : m_entryLifetime (lifetime)
+ , m_scheduler(io)
+{
+ m_scheduler.schedulePeriodicEvent (ndn::time::seconds (4), ndn::time::seconds (4),
+ ndn::bind(&SyncInterestTable::expireInterests, this));
+}
+
+SyncInterestTable::~SyncInterestTable ()
+{
+}
+
+Interest
+SyncInterestTable::pop ()
+{
+ if (m_table.size () == 0)
+ BOOST_THROW_EXCEPTION (Error::InterestTableIsEmpty ());
+
+ Interest ret = *m_table.begin ();
+ m_table.erase (m_table.begin ());
+
+ return ret;
+}
+
+bool
+SyncInterestTable::insert (DigestConstPtr digest, const string &name, bool unknownState/*=false*/)
+{
+ bool existent = false;
+
+ InterestContainer::index<named>::type::iterator it = m_table.get<named> ().find (name);
+ if (it != m_table.end())
+ {
+ existent = true;
+ m_table.erase (it);
+ }
+ m_table.insert (Interest (digest, name, unknownState));
+
+ return existent;
+}
+
+uint32_t
+SyncInterestTable::size () const
+{
+ return m_table.size ();
+}
+
+bool
+SyncInterestTable::remove (const string &name)
+{
+ InterestContainer::index<named>::type::iterator item = m_table.get<named> ().find (name);
+ if (item != m_table.get<named> ().end ())
+ {
+ m_table.get<named> ().erase (name);
+ return true;
+ }
+
+ return false;
+}
+
+bool
+SyncInterestTable::remove (DigestConstPtr digest)
+{
+ InterestContainer::index<hashed>::type::iterator item = m_table.get<hashed> ().find (digest);
+ if (item != m_table.get<hashed> ().end ())
+ {
+ m_table.get<hashed> ().erase (digest); // erase all records associated with the digest
+ return true;
+ }
+ return false;
+}
+
+void SyncInterestTable::expireInterests ()
+{
+ uint32_t count = 0;
+ ndn::time::Point expireTime = ndn::time::now() - m_entryLifetime;
+
+ while (m_table.size () > 0)
+ {
+ InterestContainer::index<timed>::type::iterator item = m_table.get<timed> ().begin ();
+
+ if (item->m_time <= expireTime)
+ {
+ m_table.get<timed> ().erase (item);
+ count ++;
+ }
+ else
+ break;
+ }
+}
+
+
+}