mdw@git.distorted.org.uk Git - adns/blob - src/tvarith.h

   1 /*
   2  * tvarith.h
   3  * - static inline functions for doing arithmetic on timevals
   4  */
   5 /*
   6  *  This file is part of adns, which is
   7  *    Copyright (C) 1997-2000,2003,2006,2014-2016  Ian Jackson
   8  *    Copyright (C) 2014  Mark Wooding
   9  *    Copyright (C) 1999-2000,2003,2006  Tony Finch
  10  *    Copyright (C) 1991 Massachusetts Institute of Technology
  11  *  (See the file INSTALL for full details.)
  12  *
  13  *  This program is free software; you can redistribute it and/or modify
  14  *  it under the terms of the GNU General Public License as published by
  15  *  the Free Software Foundation; either version 3, or (at your option)
  16  *  any later version.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software Foundation.
  25  */
  26
  27 #ifndef ADNS_TVARITH_H_INCLUDED
  28 #define ADNS_TVARITH_H_INCLUDED
  29
  30 static inline void timevaladd(struct timeval *tv_io, long ms) {
  31   struct timeval tmp;
  32   assert(ms>=0);
  33   tmp= *tv_io;
  34   tmp.tv_usec += (ms%1000)*1000;
  35   tmp.tv_sec += ms/1000;
  36   if (tmp.tv_usec >= 1000000) { tmp.tv_sec++; tmp.tv_usec -= 1000000; }
  37   *tv_io= tmp;
  38 }
  39
  40 #endif