| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2007 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 18 | * USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef TIMEVAL_H |
| 22 | #define TIMEVAL_H |
| 23 | |
| 24 | static inline struct timeval tvsub(const struct timeval a, |
| 25 | const struct timeval b) { |
| 26 | struct timeval r; |
| 27 | |
| 28 | r.tv_sec = a.tv_sec - b.tv_sec; |
| 29 | r.tv_usec = a.tv_usec - b.tv_usec; |
| 30 | if(r.tv_usec < 0) { |
| 31 | r.tv_usec += 1000000; |
| 32 | r.tv_sec--; |
| 33 | } |
| 34 | if(r.tv_usec > 999999) { |
| 35 | r.tv_usec -= 1000000; |
| 36 | r.tv_sec++; |
| 37 | } |
| 38 | return r; |
| 39 | } |
| 40 | |
| 41 | static inline struct timeval tvadd(const struct timeval a, |
| 42 | const struct timeval b) { |
| 43 | struct timeval r; |
| 44 | |
| 45 | r.tv_sec = a.tv_sec + b.tv_sec; |
| 46 | r.tv_usec = a.tv_usec + b.tv_usec; |
| 47 | if(r.tv_usec < 0) { |
| 48 | r.tv_usec += 1000000; |
| 49 | r.tv_sec--; |
| 50 | } |
| 51 | if(r.tv_usec > 999999) { |
| 52 | r.tv_usec -= 1000000; |
| 53 | r.tv_sec++; |
| 54 | } |
| 55 | return r; |
| 56 | } |
| 57 | |
| 58 | static inline double tvdouble(const struct timeval a) { |
| 59 | return a.tv_sec + a.tv_usec / 1000000.0; |
| 60 | } |
| 61 | |
| 62 | static inline int64_t tvsub_us(const struct timeval a, |
| 63 | const struct timeval b) { |
| 64 | return (((uint64_t)a.tv_sec * 1000000 + a.tv_usec) |
| 65 | - ((uint64_t)b.tv_sec * 1000000 + b.tv_usec)); |
| 66 | } |
| 67 | |
| 68 | #endif /* TIMEVAL_H */ |
| 69 | |
| 70 | /* |
| 71 | Local Variables: |
| 72 | c-basic-offset:2 |
| 73 | comment-column:40 |
| 74 | fill-column:79 |
| 75 | indent-tabs-mode:nil |
| 76 | End: |
| 77 | */ |