1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2009 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 <stdio.h> 32 #include <time.h> 33 34 #define UNCONST(a) ((void *)(unsigned long)(const void *)(a)) 35 36 #define timeval_to_double(tv) ((tv)->tv_sec * 1.0 + (tv)->tv_usec * 1.0e-6) 37 #define timernorm(tvp) \ 38 do { \ 39 while ((tvp)->tv_usec >= 1000000) { \ 40 (tvp)->tv_sec++; \ 41 (tvp)->tv_usec -= 1000000; \ 42 } \ 43 } while (0 /* CONSTCOND */); 44 45 #if __GNUC__ > 2 || defined(__INTEL_COMPILER) 46 # define _noreturn __attribute__((__noreturn__)) 47 # define _packed __attribute__((__packed__)) 48 # define _unused __attribute__((__unused__)) 49 #else 50 # define _noreturn 51 # define _packed 52 # define _unused 53 #endif 54 55 /* We don't really need this as our supported systems define __restrict 56 * automatically for us, but it is here for completeness. */ 57 #ifndef __restrict 58 # if defined(__lint__) 59 # define __restrict 60 # elif __STDC_VERSION__ >= 199901L 61 # define __restrict restrict 62 # elif !(2 < __GNUC__ || (2 == __GNU_C && 95 <= __GNUC_VERSION__)) 63 # define __restrict 64 # endif 65 #endif 66 67 int set_nonblock(int); 68 extern int clock_monotonic; 69 int get_monotonic(struct timeval *); 70 time_t uptime(void); 71 void *xrealloc(void *, size_t); 72 void *xmalloc(size_t); 73 void *xzalloc(size_t); 74 char *xstrdup(const char *); 75 76 #endif 77