source: rtems-libbsd/freebsd/sys/contrib/ck/include/ck_cc.h @ bcdce02

55-freebsd-126-freebsd-12
Last change on this file since bcdce02 was bcdce02, checked in by Sebastian Huber <sebastian.huber@…>, on Aug 21, 2018 at 11:47:02 AM

Update to FreeBSD head 2018-06-01

Git mirror commit fb63610a69b0eb7f69a201ba05c4c1a7a2739cf9.

Update #3472.

  • Property mode set to 100644
File size: 3.7 KB
Line 
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#define CK_CC_CONTAINER(F, T, M, N)                                             \
54        CK_CC_INLINE static T *                                                 \
55        N(F *p)                                                                 \
56        {                                                                       \
57                F *n = p;                                                       \
58                return (T *)(void *)(((char *)n) - ((size_t)&((T *)0)->M));     \
59        }
60
61#define CK_CC_PAD(x) union { char pad[x]; }
62
63#ifndef CK_CC_ALIASED
64#define CK_CC_ALIASED
65#endif
66
67#ifndef CK_CC_UNUSED
68#define CK_CC_UNUSED
69#endif
70
71#ifndef CK_CC_USED
72#define CK_CC_USED
73#endif
74
75#ifndef CK_CC_IMM
76#define CK_CC_IMM
77#endif
78
79#ifndef CK_CC_PACKED
80#define CK_CC_PACKED
81#endif
82
83#ifndef CK_CC_WEAKREF
84#define CK_CC_WEAKREF
85#endif
86
87#ifndef CK_CC_ALIGN
88#define CK_CC_ALIGN(X)
89#endif
90
91#ifndef CK_CC_CACHELINE
92#define CK_CC_CACHELINE
93#endif
94
95#ifndef CK_CC_LIKELY
96#define CK_CC_LIKELY(x) x
97#endif
98
99#ifndef CK_CC_UNLIKELY
100#define CK_CC_UNLIKELY(x) x
101#endif
102
103#ifndef CK_CC_TYPEOF
104#define CK_CC_TYPEOF(X, DEFAULT) (DEFAULT)
105#endif
106
107#define CK_F_CC_FFS_G(L, T)                             \
108CK_CC_INLINE static int                                 \
109ck_cc_##L(T v)                                          \
110{                                                       \
111        unsigned int i;                                 \
112                                                        \
113        if (v == 0)                                     \
114                return 0;                               \
115                                                        \
116        for (i = 1; (v & 1) == 0; i++, v >>= 1);        \
117        return i;                                       \
118}
119
120#ifndef CK_F_CC_FFS
121#define CK_F_CC_FFS
122CK_F_CC_FFS_G(ffs, unsigned int)
123#endif /* CK_F_CC_FFS */
124
125#ifndef CK_F_CC_FFSL
126#define CK_F_CC_FFSL
127CK_F_CC_FFS_G(ffsl, unsigned long)
128#endif /* CK_F_CC_FFSL */
129
130#ifndef CK_F_CC_FFSLL
131#define CK_F_CC_FFSLL
132CK_F_CC_FFS_G(ffsll, unsigned long long)
133#endif /* CK_F_CC_FFSLL */
134
135#undef CK_F_CC_FFS_G
136
137#ifndef CK_F_CC_CTZ
138#define CK_F_CC_CTZ
139CK_CC_INLINE static int
140ck_cc_ctz(unsigned int x)
141{
142        unsigned int i;
143
144        if (x == 0)
145                return 0;
146
147        for (i = 0; (x & 1) == 0; i++, x >>= 1);
148        return i;
149}
150#endif
151
152#ifndef CK_F_CC_POPCOUNT
153#define CK_F_CC_POPCOUNT
154CK_CC_INLINE static int
155ck_cc_popcount(unsigned int x)
156{
157        unsigned int acc;
158
159        for (acc = 0; x != 0; x >>= 1)
160                acc += x & 1;
161
162        return acc;
163}
164#endif
165
166
167#ifdef __cplusplus
168#define CK_CPP_CAST(type, arg) static_cast<type>(arg)
169#else
170#define CK_CPP_CAST(type, arg) arg
171#endif
172
173#endif /* CK_CC_H */
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