source: trunk/kernel/syscalls/sys_gettimeofday.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

First import

File size: 1.5 KB
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1/*
2 * sys_gettimeofday: get current time
3 *
4 * Copyright (c) 2015 UPMC Sorbonne Universites
5 *
6 * This file is part of ALMOS-kernel.
7 *
8 * ALMOS-kernel is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2.0 of the License.
11 *
12 * ALMOS-kernel is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <cpu.h>
23#include <thread.h>
24#include <time.h>
25
26int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
27{
28        error_t err;
29        uint_t tm_ms, tm_us;
30        struct timeval time;
31
32        if((tv == NULL) || NOT_IN_USPACE(tv) || NOT_IN_USPACE(tv+sizeof(*tv)))
33        {
34                err = EINVAL;
35                goto fail_inval;
36        }
37
38        if(tz) 
39                return ENOTSUPPORTED;
40
41        cpu_get_time(current_cpu, &tm_ms, &tm_us);
42        time.tv_sec = tm_ms/1000;
43        time.tv_usec = ((tm_ms%1000)*1000)+tm_us;
44
45        //printk(INFO, "%s: [%d] (%u ms) sec %u, usec %u\n", __FUNCTION__,
46        //current_cpu->gid, tm_ms, (uint32_t)time.tv_sec, (uint32_t)time.tv_usec);
47
48        err    = cpu_copy_to_uspace(tv, &time, sizeof(time));
49
50fail_inval:
51        current_thread->info.errno = err;
52        return err; 
53}
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