WFMath 0.3.11
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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 #include <iosfwd> 00032 00036 #ifdef _MSC_VER 00037 #include <sys/timeb.h> 00038 #else 00039 #include <sys/time.h> 00040 #endif 00041 00042 namespace WFMath { 00043 00044 class TimeStamp; 00045 00047 00052 class TimeDiff 00053 { 00054 TimeDiff(long sec, long usec, bool is_valid); 00055 public: 00057 TimeDiff() : m_isvalid(false) {} 00059 TimeDiff(long msec); 00060 // default copy constructor is fine 00061 00063 00067 long milliseconds() const; 00069 std::pair<long,long> full_time() const {return std::make_pair(m_sec,m_usec);} 00070 00071 bool isValid() const {return m_isvalid;} 00072 00074 friend TimeDiff& operator+=(TimeDiff&, const TimeDiff&); 00076 friend TimeDiff& operator-=(TimeDiff&, const TimeDiff&); 00078 TimeDiff operator-() const {return TimeDiff(-m_sec, -m_usec, m_isvalid);} 00079 00081 friend TimeDiff operator+(const TimeDiff &a, const TimeDiff &b); 00083 friend TimeDiff operator-(const TimeDiff &a, const TimeDiff &b); 00084 00086 friend TimeStamp& operator+=(TimeStamp&, const TimeDiff&); 00088 friend TimeStamp& operator-=(TimeStamp&, const TimeDiff&); 00089 00091 friend TimeStamp operator+(const TimeStamp &a, const TimeDiff &msec); 00093 friend TimeStamp operator-(const TimeStamp &a, const TimeDiff &msec); 00094 00096 friend TimeDiff operator-(const TimeStamp &a, const TimeStamp &b); 00097 00098 friend bool operator<(const TimeDiff&, const TimeDiff&); 00099 friend bool operator==(const TimeDiff&, const TimeDiff&); 00100 00101 private: 00102 bool m_isvalid; 00103 long m_sec, m_usec; 00104 }; 00105 00106 inline bool operator>(const TimeDiff &a, const TimeDiff &b) {return b < a;} 00107 inline bool operator<=(const TimeDiff &a, const TimeDiff &b) {return !(b < a);} 00108 inline bool operator>=(const TimeDiff &a, const TimeDiff &b) {return !(a < b);} 00109 inline bool operator!=(const TimeDiff &a, const TimeDiff &b) {return !(b == a);} 00110 00112 00117 class TimeStamp { 00118 private: 00119 #ifdef __WIN32__ 00120 // We roll our own timeval... may only need to be done for mingw32. 00121 struct { 00122 long tv_sec; /* seconds */ 00123 long tv_usec; /* microseconds */ 00124 } _val; 00125 #else 00126 // POSIX, BeOS, .... 00127 struct timeval _val; 00128 #endif 00129 bool _isvalid; 00130 TimeStamp(long sec, long usec, bool isvalid); 00131 public: 00133 TimeStamp() : _isvalid(false) {} 00134 // default copy constructor is fine 00135 00136 friend bool operator<(const TimeStamp &a, const TimeStamp &b); 00137 friend bool operator==(const TimeStamp &a, const TimeStamp &b); 00138 00139 friend std::ostream& operator<<(std::ostream& os, const TimeStamp&); 00140 friend std::istream& operator>>(std::istream& is, TimeStamp&); 00141 00142 bool isValid() const {return _isvalid;} 00144 friend TimeStamp& operator+=(TimeStamp&, const TimeDiff&); 00146 friend TimeStamp& operator-=(TimeStamp&, const TimeDiff&); 00147 00149 friend TimeStamp operator+(const TimeStamp &a, const TimeDiff &msec); 00151 friend TimeStamp operator-(const TimeStamp &a, const TimeDiff &msec); 00152 00154 friend TimeDiff operator-(const TimeStamp &a, const TimeStamp &b); 00155 00157 static TimeStamp now(); 00159 static TimeStamp epochStart(); 00160 }; 00161 00163 inline TimeStamp operator+(TimeDiff msec, const TimeStamp &a) {return a + msec;} 00164 00165 inline bool operator>(const TimeStamp &a, const TimeStamp &b) {return b < a;} 00166 inline bool operator<=(const TimeStamp &a, const TimeStamp &b) {return !(b < a);} 00167 inline bool operator>=(const TimeStamp &a, const TimeStamp &b) {return !(a < b);} 00168 inline bool operator!=(const TimeStamp &a, const TimeStamp &b) {return !(b == a);} 00169 00170 } // namespace WFMath 00171 00172 #endif // WFMATH_TIMESTAMP_H