Fixes a race condition when more than one thread tries to access the grid file (thanks Patrick)

DataStructures/HashTable.h

@@ -0,0 +1,47 @@
+/*
+    open source routing machine
+    Copyright (C) Dennis Luxen, others 2010
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU AFFERO General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+any later version.
+
+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 Affero 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
+or see http://www.gnu.org/licenses/agpl.txt.
+
+  Created on: 18.11.2010
+  Author: dennis
+*/
+
+#ifndef HASHTABLE_H_
+#define HASHTABLE_H_
+
+#include <google/sparse_hash_map>
+
+template<typename keyT, typename valueT>
+class HashTable {
+	typedef google::sparse_hash_map<keyT, valueT> MyHashTable;
+public:
+	HashTable() { }
+	HashTable(const unsigned size) {
+		table.resize(size);
+	}
+	void Add(const keyT& key, const valueT& value){
+		table[key] = value;
+	}
+	valueT Find(const keyT& key) {
+		return table.find(key)->second;
+	}
+private:
+	MyHashTable table;
+};
+
+#endif /* HASHTABLE_H_ */

DataStructures/NodeInformationHelpDesk.h

@@ -61,6 +61,10 @@ public:
 	inline bool FindRoutingStarts(const _Coordinate start, const _Coordinate target, PhantomNodes * phantomNodes) {
 	    g->FindRoutingStarts(start, target, phantomNodes);
 	}
+
+	inline void RegisterThread(const unsigned k, const unsigned v) {
+		g->threadLookup.table.Add(k, v);
+	}
 private:
 	vector<_Coordinate> * int2ExtNodeMap;
 	ReadOnlyGrid * g;

DataStructures/Util.h

@@ -37,4 +37,12 @@ inline double get_timestamp()
 double y2lat(double a) { return 180/M_PI * (2 * atan(exp(a*M_PI/180)) - M_PI/2); }
 double lat2y(double a) { return 180/M_PI * log(tan(M_PI/4+a*(M_PI/180)/2)); }
 
+inline unsigned boost_thread_id_hash(boost::thread::id const& id)
+{
+	std::stringstream ostr;
+	ostr << id;
+	std::tr1::hash<std::string> h;
+	return h(ostr.str());
+}
+
 #endif /* TIMEUTIL_H_ */

HttpServer/server.h

@@ -16,7 +16,7 @@ You should have received a copy of the GNU Affero 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
 or see http://www.gnu.org/licenses/agpl.txt.
-*/
+ */
 
 #ifndef HTTP_ROUTER_SERVER_HPP
 #define HTTP_ROUTER_SERVER_HPP
@@ -42,79 +42,80 @@ template<typename GraphT>
 class server: private boost::noncopyable
 {
 public:
-    /// Construct the server to listen on the specified TCP address and port
-    explicit server(const std::string& address, const std::string& port, std::size_t thread_pool_size, SearchEngine<EdgeData, GraphT, NodeInformationHelpDesk> * s)
-    : thread_pool_size_(thread_pool_size),
-      acceptor_(io_service_),
-      new_connection_(new connection<GraphT>(io_service_, request_handler_)),
-      request_handler_(s),
-      sEngine(s)
-    {
-        // Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
-        boost::asio::ip::tcp::resolver resolver(io_service_);
-        boost::asio::ip::tcp::resolver::query query(address, port);
-        boost::asio::ip::tcp::endpoint endpoint = *resolver.resolve(query);
+	/// Construct the server to listen on the specified TCP address and port
+	explicit server(const std::string& address, const std::string& port, std::size_t thread_pool_size, SearchEngine<EdgeData, GraphT, NodeInformationHelpDesk> * s)
+	: thread_pool_size_(thread_pool_size),
+	  acceptor_(io_service_),
+	  new_connection_(new connection<GraphT>(io_service_, request_handler_)),
+	  request_handler_(s),
+	  sEngine(s)
+	{
+		// Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
+		boost::asio::ip::tcp::resolver resolver(io_service_);
+		boost::asio::ip::tcp::resolver::query query(address, port);
+		boost::asio::ip::tcp::endpoint endpoint = *resolver.resolve(query);
 
-        acceptor_.open(endpoint.protocol());
-        acceptor_.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
-        acceptor_.bind(endpoint);
-        acceptor_.listen();
-        acceptor_.async_accept(new_connection_->socket(), boost::bind(&server::handle_accept, this, boost::asio::placeholders::error));
-    }
+		acceptor_.open(endpoint.protocol());
+		acceptor_.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
+		acceptor_.bind(endpoint);
+		acceptor_.listen();
+		acceptor_.async_accept(new_connection_->socket(), boost::bind(&server::handle_accept, this, boost::asio::placeholders::error));
+	}
 
-    /// Run the server's io_service loop.
-    void run()
-    {
-        // Create a pool of threads to run all of the io_services.
-        std::vector<boost::shared_ptr<boost::thread> > threads;
-        for (std::size_t i = 0; i < thread_pool_size_; ++i)
-        {
-            boost::shared_ptr<boost::thread> thread(new boost::thread(boost::bind(&boost::asio::io_service::run, &io_service_)));
-            threads.push_back(thread);
-        }
+	/// Run the server's io_service loop.
+	void run()
+	{
+		// Create a pool of threads to run all of the io_services.
+		std::vector<boost::shared_ptr<boost::thread> > threads;
+		for (std::size_t i = 0; i < thread_pool_size_; ++i)
+		{
+			boost::shared_ptr<boost::thread> thread(new boost::thread(boost::bind(&boost::asio::io_service::run, &io_service_)));
+			sEngine->RegisterThread( boost_thread_id_hash( thread->get_id() ), threads.size());
+			threads.push_back(thread);
+		}
 
-        // Wait for all threads in the pool to exit.
-        for (std::size_t i = 0; i < threads.size(); ++i)
-            threads[i]->join();
-    }
+		// Wait for all threads in the pool to exit.
+		for (std::size_t i = 0; i < threads.size(); ++i)
+			threads[i]->join();
+	}
 
-    /// Stop the server.
-    void stop()
-    {
-        io_service_.stop();
-    }
+	/// Stop the server.
+	void stop()
+	{
+		io_service_.stop();
+	}
 
 private:
-    typedef boost::shared_ptr<connection<GraphT> > connection_ptr;
+	typedef boost::shared_ptr<connection<GraphT> > connection_ptr;
 
-    /// Handle completion of an asynchronous accept operation.
-    void handle_accept(const boost::system::error_code& e)
-    {
-        if (!e)
-        {
-            new_connection_->start();
-            new_connection_.reset(new connection<GraphT>(io_service_, request_handler_));
-            acceptor_.async_accept(new_connection_->socket(), boost::bind(&server::handle_accept, this, boost::asio::placeholders::error));
-        }
-    }
+	/// Handle completion of an asynchronous accept operation.
+	void handle_accept(const boost::system::error_code& e)
+	{
+		if (!e)
+		{
+			new_connection_->start();
+			new_connection_.reset(new connection<GraphT>(io_service_, request_handler_));
+			acceptor_.async_accept(new_connection_->socket(), boost::bind(&server::handle_accept, this, boost::asio::placeholders::error));
+		}
+	}
 
-    /// The number of threads that will call io_service::run().
-    std::size_t thread_pool_size_;
+	/// The number of threads that will call io_service::run().
+	std::size_t thread_pool_size_;
 
-    /// The io_service used to perform asynchronous operations.
-    boost::asio::io_service io_service_;
+	/// The io_service used to perform asynchronous operations.
+	boost::asio::io_service io_service_;
 
-    /// Acceptor used to listen for incoming connections.
-    boost::asio::ip::tcp::acceptor acceptor_;
+	/// Acceptor used to listen for incoming connections.
+	boost::asio::ip::tcp::acceptor acceptor_;
 
-    /// The next connection to be accepted.
-    connection_ptr new_connection_;
+	/// The next connection to be accepted.
+	connection_ptr new_connection_;
 
-    /// The handler for all incoming requests.
-    request_handler<GraphT> request_handler_;
+	/// The handler for all incoming requests.
+	request_handler<GraphT> request_handler_;
 
-    /// The object to query the Routing Engine
-    SearchEngine<EdgeData, GraphT> * sEngine;
+	/// The object to query the Routing Engine
+	SearchEngine<EdgeData, GraphT> * sEngine;
 
 };
 

typedefs.h

@@ -29,6 +29,8 @@ or see http://www.gnu.org/licenses/agpl.txt.
 #include <cstring>
 #include <string>
 
+#include <boost/thread.hpp>
+
 using namespace std;
 
 #define VERBOSE(x) x
@@ -45,6 +47,7 @@ typedef unsigned int EdgeWeight;
 static const NodeID SPECIAL_NODEID = UINT_MAX;
 static const EdgeID SPECIAL_EDGEID = UINT_MAX;
 
+#include "DataStructures/HashTable.h"
 #include "DataStructures/NodeCoords.h"
 typedef NodeCoords<NodeID> NodeInfo;
 #include "DataStructures/Util.h"