| The Android Open Source Project | a27d2ba | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 1 | /* $OpenBSD: time.c,v 1.5 2005/08/08 08:05:34 espie Exp $ */ |
| 2 | /* |
| 3 | * Copyright (c) 1983, 1993 |
| 4 | * The Regents of the University of California. All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. Neither the name of the University nor the names of its contributors |
| 15 | * may be used to endorse or promote products derived from this software |
| 16 | * without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <time.h> |
| 32 | |
| 33 | time_t |
| 34 | time(time_t *t) |
| 35 | { |
| 36 | struct timeval tt; |
| 37 | |
| 38 | if (gettimeofday(&tt, (struct timezone *)0) < 0) |
| 39 | return (-1); |
| 40 | if (t) |
| 41 | *t = (time_t)tt.tv_sec; |
| 42 | return (tt.tv_sec); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | clock_t |
| 47 | clock(void) |
| 48 | { |
| 49 | struct timespec tm; |
| 50 | static int clock_inited; |
| 51 | static clock_t clock_start; |
| 52 | clock_t now; |
| 53 | |
| 54 | clock_gettime( CLOCK_MONOTONIC, &tm); |
| 55 | now = tm.tv_sec * CLOCKS_PER_SEC + (tm.tv_nsec * (CLOCKS_PER_SEC/1e9)); |
| 56 | |
| 57 | if (!clock_inited) { |
| 58 | clock_start = now; |
| 59 | clock_inited = 1; |
| 60 | } |
| 61 | return now - clock_start; |
| 62 | } |