src/built_in.h

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2009-2012 Daniel Borkmann.
   5  * Subject to the GPL, version 2.
   6  */
   7
   8 #ifndef BUILT_IN_H
   9 #define BUILT_IN_H
  10
  11 #include <linux/if_packet.h>
  12 #include <assert.h>
  13
  14 /* /sys/devices/system/cpu/cpuX/cache/indexX/coherency_line_size */
  15
  16 #if defined(__amd64__) || defined(__x86_64__) || defined(__AMD64__) || \
  17     defined(_M_X64) || defined(__amd64)
  18 # define CO_IN_CACHE_SHIFT              7
  19 #elif defined(__i386__) || defined(__x86__) || defined(__X86__) || \
  20       defined(_M_IX86) || defined(__i386)
  21 # define CO_IN_CACHE_SHIFT              7
  22 #elif defined(__ia64__) || defined(__IA64__) || defined(__M_IA64)
  23 # define CO_IN_CACHE_SHIFT              6
  24 #elif defined(__SPU__)
  25 # define CO_IN_CACHE_SHIFT              7
  26 #elif defined(__powerpc64__) || defined(__ppc64__) || defined(__PPC64__) || \
  27       defined(_ARCH_PPC64)
  28 # define CO_IN_CACHE_SHIFT              8
  29 #elif defined(__powerpc__) || defined(__ppc__) || defined(__PPC__) || \
  30       defined(_ARCH_PPC)
  31 # define CO_IN_CACHE_SHIFT              7
  32 #elif defined(__sparcv9__) || defined(__sparcv9)
  33 # define CO_IN_CACHE_SHIFT              6
  34 #elif defined(__sparc_v8__)
  35 # define CO_IN_CACHE_SHIFT              5
  36 #elif defined(__sparc__) || defined(__sparc)
  37 # define CO_IN_CACHE_SHIFT              5
  38 #elif defined(__ARM_EABI__)
  39 # define CO_IN_CACHE_SHIFT              5
  40 #elif defined(__arm__)
  41 # define CO_IN_CACHE_SHIFT              5
  42 #elif defined(__mips__) || defined(__mips) || defined(__MIPS__)
  43 # if defined(_ABIO32)
  44 # define CO_IN_CACHE_SHIFT              5
  45 # elif defined(_ABIN32)
  46 # define CO_IN_CACHE_SHIFT              5
  47 # else
  48 # define CO_IN_CACHE_SHIFT              6
  49 # endif
  50 #else
  51 # define CO_IN_CACHE_SHIFT              5
  52 #endif
  53
  54 #ifndef CO_CACHE_LINE_SIZE
  55 # define CO_CACHE_LINE_SIZE     (1 << CO_IN_CACHE_SHIFT)
  56 #endif
  57
  58 #ifndef __aligned_16
  59 # define __aligned_16           __attribute__((aligned(16)))
  60 #endif
  61
  62 #ifndef __cacheline_aligned
  63 # define __cacheline_aligned    __attribute__((aligned(CO_CACHE_LINE_SIZE)))
  64 #endif
  65
  66 #ifndef __aligned_tpacket
  67 # define __aligned_tpacket      __attribute__((aligned(TPACKET_ALIGNMENT)))
  68 #endif
  69
  70 #ifndef round_up
  71 # define round_up(x, alignment) (((x) + (alignment) - 1) & ~((alignment) - 1))
  72 #endif
  73
  74 #ifndef round_up_cacheline
  75 # define round_up_cacheline(x)  round_up((x), CO_CACHE_LINE_SIZE)
  76 #endif
  77
  78 #ifndef likely
  79 # define likely(x)              __builtin_expect(!!(x), 1)
  80 #endif
  81
  82 #ifndef unlikely
  83 # define unlikely(x)            __builtin_expect(!!(x), 0)
  84 #endif
  85
  86 #ifndef prefetch_rd_hi
  87 # define prefetch_rd_hi(addr)   __builtin_prefetch(addr, 0, 3)
  88 #endif
  89
  90 #ifndef prefetch_rd_lo
  91 # define prefetch_rd_lo(addr)   __builtin_prefetch(addr, 0, 0)
  92 #endif
  93
  94 #ifndef prefetch_wr_hi
  95 # define prefetch_wr_hi(addr)   __builtin_prefetch(addr, 1, 3)
  96 #endif
  97
  98 #ifndef prefetch_wr_lo
  99 # define prefetch_wr_lo(addr)   __builtin_prefetch(addr, 1, 0)
 100 #endif
 101
 102 #ifndef fmemset
 103 # define fmemset                __builtin_memset
 104 #endif
 105
 106 #ifndef fmemcpy
 107 # define fmemcpy                __builtin_memcpy
 108 #endif
 109
 110 #ifndef atomic_cmp_swp
 111 # define atomic_cmp_swp         __sync_val_compare_and_swap
 112 #endif
 113
 114 #ifndef __deprecated
 115 # define __deprecated           /* unimplemented */
 116 #endif
 117
 118 #ifndef unreachable
 119 # define unreachable()          do { } while (1)
 120 #endif
 121
 122 #ifndef __read_mostly
 123 # define __read_mostly          __attribute__((__section__(".data.read_mostly")))
 124 #endif
 125
 126 #ifndef noinline
 127 # define noinline               __attribute__((noinline))
 128 #endif
 129
 130 #ifndef __always_inline
 131 # define __always_inline        inline
 132 #endif
 133
 134 #ifndef __hidden
 135 # define __hidden               __attribute__((visibility("hidden")))
 136 #endif
 137
 138 #ifndef __pure
 139 # define __pure                 __attribute__ ((pure))
 140 #endif
 141
 142 #ifndef force_cast
 143 # define force_cast(type, arg)  ((type) (arg))
 144 #endif
 145
 146 #ifndef access_once
 147 # define access_once(x)         (*(volatile typeof(x) *) &(x))
 148 #endif
 149
 150 #ifndef max
 151 # define max(a, b)                                                      \
 152         ({                                                              \
 153                 typeof (a) _a = (a);                                    \
 154                 typeof (b) _b = (b);                                    \
 155                 _a > _b ? _a : _b;                                      \
 156         })
 157 #endif /* max */
 158
 159 #ifndef min
 160 # define min(a, b)                                                      \
 161         ({                                                              \
 162                 typeof (a) _a = (a);                                    \
 163                 typeof (b) _b = (b);                                    \
 164                 _a < _b ? _a : _b;                                      \
 165         })
 166 #endif /* min */
 167
 168 #ifndef ispow2
 169 #define ispow2(x)               ({ !!((x) && !((x) & ((x) - 1))); })
 170 #endif
 171
 172 #ifndef offsetof
 173 # define offsetof(type, member) ((size_t) &((type *) 0)->member)
 174 #endif
 175
 176 #ifndef container_of
 177 # define container_of(ptr, type, member)                                \
 178         ({                                                              \
 179                 const typeof(((type *) 0)->member) * __mptr = (ptr);    \
 180                 (type *) ((char *) __mptr - offsetof(type, member));    \
 181         })
 182 #endif
 183
 184 #ifndef array_size
 185 # define array_size(x)  (sizeof(x) / sizeof((x)[0]) + __must_be_array(x))
 186 #endif
 187
 188 #ifndef __must_be_array
 189 # define __must_be_array(x)                                             \
 190         build_bug_on_zero(__builtin_types_compatible_p(typeof(x),       \
 191                                                        typeof(&x[0])))
 192 #endif
 193
 194 #ifndef build_bug_on_zero
 195 # define build_bug_on_zero(e)   (sizeof(char[1 - 2 * !!(e)]) - 1)
 196 #endif
 197
 198 #ifndef bug_on
 199 # define bug_on(cond)           assert(!(cond))
 200 #endif
 201
 202 #ifndef bug
 203 # define bug                    assert(0)
 204 #endif
 205
 206 #endif /* BUILT_IN_H */