roy.marples.name Git - dhcpcd-ui/blob - src/dhcpcd-curses/common.h

   1 /*
   2  * dhcpcd - DHCP client daemon
   3  * Copyright (c) 2006-2015 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
  33 #include "config.h"
  34
  35 #define USEC_PER_SEC            1000000L
  36 #define USEC_PER_NSEC           1000L
  37 #define NSEC_PER_SEC            1000000000L
  38 #define MSEC_PER_SEC            1000L
  39 #define MSEC_PER_NSEC           1000000L
  40
  41 /* Some systems don't define timespec macros */
  42 #ifndef timespecclear
  43 #define timespecclear(tsp)      (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L)
  44 #define timespecisset(tsp)      ((tsp)->tv_sec || (tsp)->tv_nsec)
  45 #define timespeccmp(tsp, usp, cmp)                                      \
  46         (((tsp)->tv_sec == (usp)->tv_sec) ?                             \
  47             ((tsp)->tv_nsec cmp (usp)->tv_nsec) :                       \
  48             ((tsp)->tv_sec cmp (usp)->tv_sec))
  49 #define timespecadd(tsp, usp, vsp)                                      \
  50         do {                                                            \
  51                 (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec;          \
  52                 (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec;       \
  53                 if ((vsp)->tv_nsec >= 1000000000L) {                    \
  54                         (vsp)->tv_sec++;                                \
  55                         (vsp)->tv_nsec -= 1000000000L;                  \
  56                 }                                                       \
  57         } while (/* CONSTCOND */ 0)
  58 #define timespecsub(tsp, usp, vsp)                                      \
  59         do {                                                            \
  60                 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;          \
  61                 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;       \
  62                 if ((vsp)->tv_nsec < 0) {                               \
  63                         (vsp)->tv_sec--;                                \
  64                         (vsp)->tv_nsec += 1000000000L;                  \
  65                 }                                                       \
  66         } while (/* CONSTCOND */ 0)
  67 #endif
  68
  69 #define timespecnorm(tv) do {                                                \
  70         while ((tv)->tv_nsec >=  NSEC_PER_SEC) {                             \
  71                 (tv)->tv_sec++;                                              \
  72                 (tv)->tv_nsec -= NSEC_PER_SEC;                               \
  73         }                                                                    \
  74 } while (0 /* CONSTCOND */);
  75
  76 #if __GNUC__ > 2 || defined(__INTEL_COMPILER)
  77 # ifndef __dead
  78 #  define __dead __attribute__((__noreturn__))
  79 # endif
  80 # ifndef __packed
  81 #  define __packed   __attribute__((__packed__))
  82 # endif
  83 # ifndef __unused
  84 #  define __unused   __attribute__((__unused__))
  85 # endif
  86 #else
  87 # ifndef __dead
  88 #  define __dead
  89 # endif
  90 # ifndef __packed
  91 #  define __packed
  92 # endif
  93 # ifndef __unused
  94 #  define __unused
  95 # endif
  96 #endif
  97
  98 #endif