blob: a474fb33721badec1e571cc89a887983778b4571 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
|
// Copyright © Tavian Barnes <tavianator@tavianator.com>
// SPDX-License-Identifier: 0BSD
/**
* Configuration and feature/platform detection.
*/
#ifndef BFS_CONFIG_H
#define BFS_CONFIG_H
// Possible __STDC_VERSION__ values
#define C95 199409L
#define C99 199901L
#define C11 201112L
#define C17 201710L
#define C23 202311L
#include <stddef.h>
#if __STDC_VERSION__ < C23
# include <stdalign.h>
# include <stdbool.h>
# include <stdnoreturn.h>
#endif
// bfs packaging configuration
#ifndef BFS_COMMAND
# define BFS_COMMAND "bfs"
#endif
#ifndef BFS_VERSION
# define BFS_VERSION "3.0.4"
#endif
#ifndef BFS_HOMEPAGE
# define BFS_HOMEPAGE "https://tavianator.com/projects/bfs.html"
#endif
// Check for system headers
#ifdef __has_include
#if __has_include(<mntent.h>)
# define BFS_HAS_MNTENT_H true
#endif
#if __has_include(<paths.h>)
# define BFS_HAS_PATHS_H true
#endif
#if __has_include(<sys/acl.h>)
# define BFS_HAS_SYS_ACL_H true
#endif
#if __has_include(<sys/capability.h>)
# define BFS_HAS_SYS_CAPABILITY_H true
#endif
#if __has_include(<sys/extattr.h>)
# define BFS_HAS_SYS_EXTATTR_H true
#endif
#if __has_include(<sys/mkdev.h>)
# define BFS_HAS_SYS_MKDEV_H true
#endif
#if __has_include(<sys/param.h>)
# define BFS_HAS_SYS_PARAM_H true
#endif
#if __has_include(<sys/sysmacros.h>)
# define BFS_HAS_SYS_SYSMACROS_H true
#endif
#if __has_include(<sys/xattr.h>)
# define BFS_HAS_SYS_XATTR_H true
#endif
#if __has_include(<threads.h>)
# define BFS_HAS_THREADS_H true
#endif
#if __has_include(<util.h>)
# define BFS_HAS_UTIL_H true
#endif
#else // !__has_include
#define BFS_HAS_MNTENT_H __GLIBC__
#define BFS_HAS_PATHS_H true
#define BFS_HAS_SYS_ACL_H true
#define BFS_HAS_SYS_CAPABILITY_H __linux__
#define BFS_HAS_SYS_EXTATTR_H __FreeBSD__
#define BFS_HAS_SYS_MKDEV_H false
#define BFS_HAS_SYS_PARAM_H true
#define BFS_HAS_SYS_SYSMACROS_H __GLIBC__
#define BFS_HAS_SYS_XATTR_H __linux__
#define BFS_HAS_THREADS_H (!__STDC_NO_THREADS__)
#define BFS_HAS_UTIL_H __NetBSD__
#endif // !__has_include
#ifndef BFS_USE_MNTENT_H
# define BFS_USE_MNTENT_H BFS_HAS_MNTENT_H
#endif
#ifndef BFS_USE_PATHS_H
# define BFS_USE_PATHS_H BFS_HAS_PATHS_H
#endif
#ifndef BFS_USE_SYS_ACL_H
# define BFS_USE_SYS_ACL_H BFS_HAS_SYS_ACL_H
#endif
#ifndef BFS_USE_SYS_CAPABILITY_H
# define BFS_USE_SYS_CAPABILITY_H (BFS_HAS_SYS_CAPABILITY_H && !__FreeBSD__)
#endif
#ifndef BFS_USE_SYS_EXTATTR_H
# define BFS_USE_SYS_EXTATTR_H BFS_HAS_SYS_EXTATTR_H
#endif
#ifndef BFS_USE_SYS_MKDEV_H
# define BFS_USE_SYS_MKDEV_H BFS_HAS_SYS_MKDEV_H
#endif
#ifndef BFS_USE_SYS_PARAM_H
# define BFS_USE_SYS_PARAM_H BFS_HAS_SYS_PARAM_H
#endif
#ifndef BFS_USE_SYS_SYSMACROS_H
# define BFS_USE_SYS_SYSMACROS_H BFS_HAS_SYS_SYSMACROS_H
#endif
#ifndef BFS_USE_SYS_XATTR_H
# define BFS_USE_SYS_XATTR_H BFS_HAS_SYS_XATTR_H
#endif
#ifndef BFS_USE_THREADS_H
# define BFS_USE_THREADS_H BFS_HAS_THREADS_H
#endif
#ifndef BFS_USE_UTIL_H
# define BFS_USE_UTIL_H BFS_HAS_UTIL_H
#endif
// Stub out feature detection on old/incompatible compilers
#ifndef __has_feature
# define __has_feature(feat) false
#endif
#ifndef __has_c_attribute
# define __has_c_attribute(attr) false
#endif
#ifndef __has_attribute
# define __has_attribute(attr) false
#endif
// Platform detection
// Get the definition of BSD if available
#if BFS_USE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifndef __GLIBC_PREREQ
# define __GLIBC_PREREQ(maj, min) false
#endif
// Fundamental utilities
/**
* Get the length of an array.
*/
#define countof(array) (sizeof(array) / sizeof(0[array]))
/**
* False sharing/destructive interference/largest cache line size.
*/
#ifdef __GCC_DESTRUCTIVE_SIZE
# define FALSE_SHARING_SIZE __GCC_DESTRUCTIVE_SIZE
#else
# define FALSE_SHARING_SIZE 64
#endif
/**
* True sharing/constructive interference/smallest cache line size.
*/
#ifdef __GCC_CONSTRUCTIVE_SIZE
# define TRUE_SHARING_SIZE __GCC_CONSTRUCTIVE_SIZE
#else
# define TRUE_SHARING_SIZE 64
#endif
/**
* Alignment specifier that avoids false sharing.
*/
#define cache_align alignas(FALSE_SHARING_SIZE)
#if __COSMOPOLITAN__
typedef long double max_align_t;
#endif
// Wrappers for attributes
/**
* Silence compiler warnings about switch/case fall-throughs.
*/
#if __has_c_attribute(fallthrough)
# define fallthru [[fallthrough]]
#elif __has_attribute(fallthrough)
# define fallthru __attribute__((fallthrough))
#else
# define fallthru ((void)0)
#endif
/**
* Warn if a value is unused.
*/
#if __has_c_attribute(nodiscard)
# define attr_nodiscard [[nodiscard]]
#elif __has_attribute(nodiscard)
# define attr_nodiscard __attribute__((nodiscard))
#else
# define attr_nodiscard
#endif
/**
* Hint to avoid inlining a function.
*/
#if __has_attribute(noinline)
# define attr_noinline __attribute__((noinline))
#else
# define attr_noinline
#endif
/**
* Hint that a function is unlikely to be called.
*/
#if __has_attribute(cold)
# define attr_cold attr_noinline __attribute__((cold))
#else
# define attr_cold attr_noinline
#endif
/**
* Adds compiler warnings for bad printf()-style function calls, if supported.
*/
#if __has_attribute(format)
# define attr_format(fmt, args) __attribute__((format(printf, fmt, args)))
#else
# define attr_format(fmt, args)
#endif
/**
* Annotates allocator-like functions.
*/
#if __has_attribute(malloc)
# if __clang__
# define attr_malloc(...) attr_nodiscard __attribute__((malloc))
# else
# define attr_malloc(...) attr_nodiscard __attribute__((malloc(__VA_ARGS__)))
# endif
#else
# define attr_malloc(...) attr_nodiscard
#endif
/**
* Specifies that a function returns allocations with a given alignment.
*/
#if __has_attribute(alloc_align)
# define attr_alloc_align(param) __attribute__((alloc_align(param)))
#else
# define attr_alloc_align(param)
#endif
/**
* Specifies that a function returns allocations with a given size.
*/
#if __has_attribute(alloc_size)
# define attr_alloc_size(...) __attribute__((alloc_size(__VA_ARGS__)))
#else
# define attr_alloc_size(...)
#endif
/**
* Shorthand for attr_alloc_align() and attr_alloc_size().
*/
#define attr_aligned_alloc(align, ...) \
attr_alloc_align(align) \
attr_alloc_size(__VA_ARGS__)
/**
* Check if function multiversioning via GNU indirect functions (ifunc) is supported.
*/
#ifndef BFS_USE_TARGET_CLONES
# if __has_attribute(target_clones) && (__GLIBC__ || __FreeBSD__ || __NetBSD__)
# define BFS_USE_TARGET_CLONES true
# endif
#endif
/**
* Apply the target_clones attribute, if available.
*/
#if BFS_USE_TARGET_CLONES
# define attr_target_clones(...) __attribute__((target_clones(__VA_ARGS__)))
#else
# define attr_target_clones(...)
#endif
#endif // BFS_CONFIG_H
|
