1/*
2 * dhcpcd - DHCP client daemon
3 * Copyright (c) 2006-2011 Roy Marples <roy@marples.name>
4 * 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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#ifndef COMMON_H
29#define COMMON_H
30
31#include <sys/time.h>
32#include <stdio.h>
33
34#include "config.h"
35#include "defs.h"
36
37#define UNCONST(a)		((void *)(unsigned long)(const void *)(a))
38
39#define timeval_to_double(tv) ((tv)->tv_sec * 1.0 + (tv)->tv_usec * 1.0e-6)
40#define ms_to_tv(tv, ms) 						\
41	do {								\
42		(tv)->tv_sec = (ms / 1000);				\
43		(tv)->tv_usec = ((ms % 1000) * 1000);			\
44	} while (0 /* CONSTCOND */);
45#define timernorm(tvp)							\
46	do {								\
47		while ((tvp)->tv_usec >= 1000000) {			\
48			(tvp)->tv_sec++;				\
49			(tvp)->tv_usec -= 1000000;			\
50		}							\
51	} while (0 /* CONSTCOND */);
52
53#if __GNUC__ > 2 || defined(__INTEL_COMPILER)
54# define _noreturn __attribute__((__noreturn__))
55# define _packed   __attribute__((__packed__))
56# define _unused   __attribute__((__unused__))
57#else
58# define _noreturn
59# define _packed
60# define _unused
61#endif
62
63/* We don't really need this as our supported systems define __restrict
64 * automatically for us, but it is here for completeness. */
65#ifndef __restrict
66# if defined(__lint__)
67#  define __restrict
68# elif __STDC_VERSION__ >= 199901L
69#  define __restrict restrict
70# elif !(2 < __GNUC__ || (2 == __GNU_C && 95 <= __GNUC_VERSION__))
71#  define __restrict
72# endif
73#endif
74
75int set_cloexec(int);
76int set_nonblock(int);
77char *get_line(FILE * __restrict);
78extern int clock_monotonic;
79int get_monotonic(struct timeval *);
80ssize_t setvar(char ***, const char *, const char *, const char *);
81ssize_t setvard(char ***, const char *, const char *, int);
82time_t uptime(void);
83int writepid(int, pid_t);
84void *xrealloc(void *, size_t);
85void *xmalloc(size_t);
86void *xzalloc(size_t);
87char *xstrdup(const char *);
88
89#endif
90