source: trunk/debian/packages/libubox/trunk/utils.c @ 857

Last change on this file since 857 was 857, checked in by amain, 4 years ago

libubox: initial import / part 4

File size: 2.7 KB
Line 
1/*
2 * utils - misc libubox utility functions
3 *
4 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include "utils.h"
20#include <stdarg.h>
21#include <stdlib.h>
22#include <stdio.h>
23
24#define foreach_arg(_arg, _addr, _len, _first_addr, _first_len) \
25        for (_addr = (_first_addr), _len = (_first_len); \
26                _addr; \
27                _addr = va_arg(_arg, void **), _len = _addr ? va_arg(_arg, size_t) : 0)
28
29void *__calloc_a(size_t len, ...)
30{
31        va_list ap, ap1;
32        void *ret;
33        void **cur_addr;
34        size_t cur_len;
35        int alloc_len = 0;
36        char *ptr;
37
38        va_start(ap, len);
39
40        va_copy(ap1, ap);
41        foreach_arg(ap1, cur_addr, cur_len, &ret, len)
42                alloc_len += cur_len;
43        va_end(ap1);
44
45        ptr = calloc(1, alloc_len);
46        if (!ptr)
47                return NULL;
48        alloc_len = 0;
49        foreach_arg(ap, cur_addr, cur_len, &ret, len) {
50                *cur_addr = &ptr[alloc_len];
51                alloc_len += cur_len;
52        }
53        va_end(ap);
54
55        return ret;
56}
57
58#ifdef __APPLE__
59#include <mach/mach_host.h>             /* host_get_clock_service() */
60#include <mach/mach_port.h>             /* mach_port_deallocate() */
61#include <mach/mach_init.h>             /* mach_host_self(), mach_task_self() */
62#include <mach/clock.h>                 /* clock_get_time() */
63
64static clock_serv_t clock_realtime;
65static clock_serv_t clock_monotonic;
66
67static void __constructor clock_name_init(void)
68{
69        mach_port_t host_self = mach_host_self();
70
71        host_get_clock_service(host_self, CLOCK_REALTIME, &clock_realtime);
72        host_get_clock_service(host_self, CLOCK_MONOTONIC, &clock_monotonic);
73}
74
75static void __destructor clock_name_dealloc(void)
76{
77        mach_port_t self = mach_task_self();
78
79        mach_port_deallocate(self, clock_realtime);
80        mach_port_deallocate(self, clock_monotonic);
81}
82
83int clock_gettime(int type, struct timespec *tv)
84{
85        int retval = -1;
86        mach_timespec_t mts;
87
88        switch (type) {
89                case CLOCK_REALTIME:
90                        retval = clock_get_time(clock_realtime, &mts);
91                        break;
92                case CLOCK_MONOTONIC:
93                        retval = clock_get_time(clock_monotonic, &mts);
94                        break;
95                default:
96                        goto out;
97        }
98
99        tv->tv_sec = mts.tv_sec;
100        tv->tv_nsec = mts.tv_nsec;
101out:
102        return retval;
103}
104
105#endif
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