ck_cc.h

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    1 /*
    2  * Copyright 2009-2015 Samy Al Bahra.
    3  * Copyright 2014 Paul Khuong.
    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 CK_CC_H
   29 #define CK_CC_H
   30 
   31 #if defined(__GNUC__) || defined(__SUNPRO_C)
   32 #include "gcc/ck_cc.h"
   33 #endif
   34 
   35 #ifndef CK_CC_RESTRICT
   36 #define CK_CC_RESTRICT
   37 #endif
   38 
   39 #ifndef CK_CC_INLINE
   40 #define CK_CC_INLINE inline
   41 #endif
   42 
   43 #ifndef CK_CC_FORCE_INLINE
   44 #define CK_CC_FORCE_INLINE inline
   45 #endif
   46 
   47 #define CK_CC_DECONST_PTR(X) ((void *)(uintptr_t)(X))
   48 
   49 /*
   50  * Container function.
   51  * This relies on (compiler) implementation-defined behavior.
   52  */
   53 #ifndef CK_CC_CONTAINER
   54 #define CK_CC_CONTAINER(F, T, M, N)                                             \
   55         CK_CC_INLINE static T *                                                 \
   56         N(F *p)                                                                 \
   57         {                                                                       \
   58                 F *n = p;                                                       \
   59                 return (T *)(void *)(((char *)n) - ((size_t)&((T *)0)->M));     \
   60         }
   61 #endif
   62 
   63 #define CK_CC_PAD(x) union { char pad[x]; }
   64 
   65 #ifndef CK_CC_ALIASED
   66 #define CK_CC_ALIASED
   67 #endif
   68 
   69 #ifndef CK_CC_UNUSED
   70 #define CK_CC_UNUSED
   71 #endif
   72 
   73 #ifndef CK_CC_USED
   74 #define CK_CC_USED
   75 #endif
   76 
   77 #ifndef CK_CC_IMM
   78 #define CK_CC_IMM
   79 #endif
   80 
   81 #ifndef CK_CC_PACKED
   82 #define CK_CC_PACKED
   83 #endif
   84 
   85 #ifndef CK_CC_WEAKREF
   86 #define CK_CC_WEAKREF
   87 #endif
   88 
   89 #ifndef CK_CC_ALIGN
   90 #define CK_CC_ALIGN(X)
   91 #endif
   92 
   93 #ifndef CK_CC_CACHELINE
   94 #define CK_CC_CACHELINE
   95 #endif
   96 
   97 #ifndef CK_CC_LIKELY
   98 #define CK_CC_LIKELY(x) x
   99 #endif
  100 
  101 #ifndef CK_CC_UNLIKELY
  102 #define CK_CC_UNLIKELY(x) x
  103 #endif
  104 
  105 #ifndef CK_CC_TYPEOF
  106 #define CK_CC_TYPEOF(X, DEFAULT) (DEFAULT)
  107 #endif
  108 
  109 #define CK_F_CC_FFS_G(L, T)                             \
  110 CK_CC_INLINE static int                                 \
  111 ck_cc_##L(T v)                                          \
  112 {                                                       \
  113         unsigned int i;                                 \
  114                                                         \
  115         if (v == 0)                                     \
  116                 return 0;                               \
  117                                                         \
  118         for (i = 1; (v & 1) == 0; i++, v >>= 1);        \
  119         return i;                                       \
  120 }
  121 
  122 #ifndef CK_F_CC_FFS
  123 #define CK_F_CC_FFS
  124 CK_F_CC_FFS_G(ffs, unsigned int)
  125 #endif /* CK_F_CC_FFS */
  126 
  127 #ifndef CK_F_CC_FFSL
  128 #define CK_F_CC_FFSL
  129 CK_F_CC_FFS_G(ffsl, unsigned long)
  130 #endif /* CK_F_CC_FFSL */
  131 
  132 #ifndef CK_F_CC_FFSLL
  133 #define CK_F_CC_FFSLL
  134 CK_F_CC_FFS_G(ffsll, unsigned long long)
  135 #endif /* CK_F_CC_FFSLL */
  136 
  137 #undef CK_F_CC_FFS_G
  138 
  139 #ifndef CK_F_CC_CTZ
  140 #define CK_F_CC_CTZ
  141 CK_CC_INLINE static int
  142 ck_cc_ctz(unsigned int x)
  143 {
  144         unsigned int i;
  145 
  146         if (x == 0)
  147                 return 0;
  148 
  149         for (i = 0; (x & 1) == 0; i++, x >>= 1);
  150         return i;
  151 }
  152 #endif
  153 
  154 #ifndef CK_F_CC_POPCOUNT
  155 #define CK_F_CC_POPCOUNT
  156 CK_CC_INLINE static int
  157 ck_cc_popcount(unsigned int x)
  158 {
  159         unsigned int acc;
  160 
  161         for (acc = 0; x != 0; x >>= 1)
  162                 acc += x & 1;
  163 
  164         return acc;
  165 }
  166 #endif
  167 
  168 
  169 #ifdef __cplusplus
  170 #define CK_CPP_CAST(type, arg) static_cast<type>(arg)
  171 #else
  172 #define CK_CPP_CAST(type, arg) arg
  173 #endif
  174 
  175 #endif /* CK_CC_H */

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FreeBSD/Linux Kernel Cross Reference sys/contrib/ck/include/ck_cc.h

FreeBSD/Linux Kernel Cross Reference
sys/contrib/ck/include/ck_cc.h