Sirikata
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00001 /* Sirikata 00002 * NTPTimeSync.hpp 00003 * 00004 * Copyright (c) 2009, Ewen Cheslack-Postava 00005 * All rights reserved. 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions are 00009 * met: 00010 * * Redistributions of source code must retain the above copyright 00011 * notice, this list of conditions and the following disclaimer. 00012 * * Redistributions in binary form must reproduce the above copyright 00013 * notice, this list of conditions and the following disclaimer in 00014 * the documentation and/or other materials provided with the 00015 * distribution. 00016 * * Neither the name of Sirikata nor the names of its contributors may 00017 * be used to endorse or promote products derived from this software 00018 * without specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 00021 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 00022 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00023 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 00024 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00025 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00026 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00027 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00028 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00029 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00030 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00031 */ 00032 00033 #ifndef _SIRIKATA_TIME_SYNC_HPP_ 00034 #define _SIRIKATA_TIME_SYNC_HPP_ 00035 00036 #include <sirikata/core/util/Platform.hpp> 00037 #include <sirikata/core/util/Time.hpp> 00038 #include <sirikata/core/util/Thread.hpp> 00039 00040 namespace Sirikata { 00041 00043 class SIRIKATA_EXPORT NTPTimeSync { 00044 public: 00045 NTPTimeSync(); 00046 00047 void start(const String& server); 00048 void stop(); 00049 00050 private: 00051 bool mSyncedOnce; 00052 bool mDone; 00053 int ntp_ctl_pipes[2]; // Control data from cbr -> sync.py 00054 int ntp_data_pipes[2]; // Offset data from sync.py -> cbr 00055 Thread* mSyncThread; 00056 }; // class NTPTimeSync 00057 00058 } // namespace Sirikata 00059 00060 #endif //_SIRIKATA_TIME_SYNC_HPP_