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timestamp.h

00001 // timestamp.h (time functions, taken from Eris) 00002 // 00003 // The WorldForge Project 00004 // Copyright (C) 2002 The WorldForge Project 00005 // 00006 // This program is free software; you can redistribute it and/or modify 00007 // it under the terms of the GNU General Public License as published by 00008 // the Free Software Foundation; either version 2 of the License, or 00009 // (at your option) any later version. 00010 // 00011 // This program is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 // 00016 // You should have received a copy of the GNU General Public License 00017 // along with this program; if not, write to the Free Software 00018 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00019 // 00020 // For information about WorldForge and its authors, please contact 00021 // the Worldforge Web Site at http://www.worldforge.org. 00022 00023 // Author: Ron Steinke 00024 // Created: 2002-5-23 00025 00026 #ifndef WFMATH_TIMESTAMP_H 00027 #define WFMATH_TIMESTAMP_H 00028 00029 #include <wfmath/const.h> 00030 #include <algorithm> // For std::pair 00031 00035 #ifdef _MSC_VER 00036 #include <sys/timeb.h> 00037 #else 00038 #include <sys/time.h> 00039 #endif 00040 00041 namespace WFMath { 00042 00043 class TimeStamp; 00044 00046 00051 class TimeDiff 00052 { 00053 TimeDiff(long sec, long usec, bool is_valid); 00054 public: 00056 TimeDiff() : m_isvalid(false) {} 00058 TimeDiff(long msec); 00059 // default copy constructor is fine 00060 00062 00066 long milliseconds() const; 00068 std::pair<long,long> full_time() const {return std::make_pair(m_sec,m_usec);} 00069 00070 bool isValid() const {return m_isvalid;} 00071 00073 friend TimeDiff& operator+=(TimeDiff&, const TimeDiff&); 00075 friend TimeDiff& operator-=(TimeDiff&, const TimeDiff&); 00077 TimeDiff operator-() const {return TimeDiff(-m_sec, -m_usec, m_isvalid);} 00078 00080 friend TimeDiff operator+(const TimeDiff &a, const TimeDiff &b); 00082 friend TimeDiff operator-(const TimeDiff &a, const TimeDiff &b); 00083 00085 friend TimeStamp& operator+=(TimeStamp&, const TimeDiff&); 00087 friend TimeStamp& operator-=(TimeStamp&, const TimeDiff&); 00088 00090 friend TimeStamp operator+(const TimeStamp &a, const TimeDiff &msec); 00092 friend TimeStamp operator-(const TimeStamp &a, const TimeDiff &msec); 00093 00095 friend TimeDiff operator-(const TimeStamp &a, const TimeStamp &b); 00096 00097 friend bool operator<(const TimeDiff&, const TimeDiff&); 00098 friend bool operator==(const TimeDiff&, const TimeDiff&); 00099 00100 private: 00101 bool m_isvalid; 00102 long m_sec, m_usec; 00103 }; 00104 00105 inline bool operator>(const TimeDiff &a, const TimeDiff &b) {return b < a;} 00106 inline bool operator<=(const TimeDiff &a, const TimeDiff &b) {return !(b < a);} 00107 inline bool operator>=(const TimeDiff &a, const TimeDiff &b) {return !(a < b);} 00108 inline bool operator!=(const TimeDiff &a, const TimeDiff &b) {return !(b == a);} 00109 00111 00116 class TimeStamp { 00117 private: 00118 #ifdef __WIN32__ 00119 // We roll our own timeval... may only need to be done for mingw32. 00120 struct { 00121 long tv_sec; /* seconds */ 00122 long tv_usec; /* microseconds */ 00123 } _val; 00124 #else 00125 // POSIX, BeOS, .... 00126 struct timeval _val; 00127 #endif 00128 bool _isvalid; 00129 TimeStamp(long sec, long usec, bool isvalid); 00130 public: 00132 TimeStamp() : _isvalid(false) {} 00133 // default copy constructor is fine 00134 00135 friend bool operator<(const TimeStamp &a, const TimeStamp &b); 00136 friend bool operator==(const TimeStamp &a, const TimeStamp &b); 00137 00138 friend std::ostream& operator<<(std::ostream& os, const TimeStamp&); 00139 friend std::istream& operator>>(std::istream& is, TimeStamp&); 00140 00141 bool isValid() const {return _isvalid;} 00143 friend TimeStamp& operator+=(TimeStamp&, const TimeDiff&); 00145 friend TimeStamp& operator-=(TimeStamp&, const TimeDiff&); 00146 00148 friend TimeStamp operator+(const TimeStamp &a, const TimeDiff &msec); 00150 friend TimeStamp operator-(const TimeStamp &a, const TimeDiff &msec); 00151 00153 friend TimeDiff operator-(const TimeStamp &a, const TimeStamp &b); 00154 00156 static TimeStamp now(); 00158 static TimeStamp epochStart(); 00159 }; 00160 00162 inline TimeStamp operator+(TimeDiff msec, const TimeStamp &a) {return a + msec;} 00163 00164 inline bool operator>(const TimeStamp &a, const TimeStamp &b) {return b < a;} 00165 inline bool operator<=(const TimeStamp &a, const TimeStamp &b) {return !(b < a);} 00166 inline bool operator>=(const TimeStamp &a, const TimeStamp &b) {return !(a < b);} 00167 inline bool operator!=(const TimeStamp &a, const TimeStamp &b) {return !(b == a);} 00168 00169 } // namespace WFMath 00170 00171 #endif // WFMATH_TIMESTAMP_H

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