dep/src/zthread/posix/GetTimeOfDayStrategy.h

   1 /*
   2  * Copyright (c) 2005, Eric Crahen
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is furnished
   9  * to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in all
  12  * copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  */
  22
  23 #ifndef __ZTTIMESTRATEGY_H__
  24 #define __ZTTIMESTRATEGY_H__
  25
  26 #include <sys/time.h>
  27
  28 namespace ZThread {
  29
  30 /**
  31  * @class TimeStrategy
  32  *
  33  * Implement a strategy for time operatons based on gettimeofday
  34  */
  35 class TimeStrategy {
  36
  37   struct timeval _value;
  38
  39 public:
  40
  41   TimeStrategy() {
  42     gettimeofday(&_value, 0);
  43   }
  44
  45   inline unsigned long seconds() const {
  46     return _value.tv_sec;
  47   }
  48
  49   inline unsigned long milliseconds() const {
  50     return _value.tv_usec/1000;
  51   }
  52
  53   unsigned long seconds(unsigned long s) {
  54
  55     unsigned long z = seconds();
  56     _value.tv_sec = s;
  57
  58     return z;
  59
  60   }
  61
  62   unsigned long milliseconds(unsigned long ms) {
  63
  64     unsigned long z = milliseconds();
  65     _value.tv_usec = ms*1000;
  66
  67     return z;
  68
  69   }
  70
  71 };
  72
  73 };
  74
  75 #endif // __ZTTIMESTRATEGY_H__