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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
c2f1db8f | 2 | #pragma once |
60918275 | 3 | |
a7334b09 LP |
4 | /*** |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2010 Lennart Poettering | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
10 | under the terms of the GNU Lesser General Public License as published by |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
12 | (at your option) any later version. |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 17 | Lesser General Public License for more details. |
a7334b09 | 18 | |
5430f7f2 | 19 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
21 | ***/ | |
22 | ||
c31e1495 | 23 | #include <inttypes.h> |
c01ff965 | 24 | #include <stdbool.h> |
afc5dbf3 | 25 | #include <sys/param.h> |
27d13af7 | 26 | #include <sys/sysmacros.h> |
afc5dbf3 | 27 | #include <sys/types.h> |
60918275 | 28 | |
44b601bc | 29 | #define _printf_(a,b) __attribute__ ((format (printf, a, b))) |
26e9e10b ZJS |
30 | #ifdef __clang__ |
31 | # define _alloc_(...) | |
32 | #else | |
33 | # define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__))) | |
34 | #endif | |
93a46b0b | 35 | #define _sentinel_ __attribute__ ((sentinel)) |
93a46b0b LP |
36 | #define _unused_ __attribute__ ((unused)) |
37 | #define _destructor_ __attribute__ ((destructor)) | |
38 | #define _pure_ __attribute__ ((pure)) | |
39 | #define _const_ __attribute__ ((const)) | |
40 | #define _deprecated_ __attribute__ ((deprecated)) | |
41 | #define _packed_ __attribute__ ((packed)) | |
42 | #define _malloc_ __attribute__ ((malloc)) | |
43 | #define _weak_ __attribute__ ((weak)) | |
44 | #define _likely_(x) (__builtin_expect(!!(x),1)) | |
45 | #define _unlikely_(x) (__builtin_expect(!!(x),0)) | |
40473a70 LP |
46 | #define _public_ __attribute__ ((visibility("default"))) |
47 | #define _hidden_ __attribute__ ((visibility("hidden"))) | |
ad780f19 | 48 | #define _weakref_(x) __attribute__((weakref(#x))) |
19d1e4ee | 49 | #define _alignas_(x) __attribute__((aligned(__alignof(x)))) |
dfb33a97 | 50 | #define _cleanup_(x) __attribute__((cleanup(x))) |
4831981d | 51 | #define _fallthrough_ __attribute__((fallthrough)) |
60918275 | 52 | |
7ebe131a LP |
53 | /* Temporarily disable some warnings */ |
54 | #define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT \ | |
55 | _Pragma("GCC diagnostic push"); \ | |
56 | _Pragma("GCC diagnostic ignored \"-Wdeclaration-after-statement\"") | |
57 | ||
bcfce235 LP |
58 | #define DISABLE_WARNING_FORMAT_NONLITERAL \ |
59 | _Pragma("GCC diagnostic push"); \ | |
60 | _Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"") | |
61 | ||
f0f2e63b LP |
62 | #define DISABLE_WARNING_MISSING_PROTOTYPES \ |
63 | _Pragma("GCC diagnostic push"); \ | |
64 | _Pragma("GCC diagnostic ignored \"-Wmissing-prototypes\"") | |
65 | ||
8fca4e30 LP |
66 | #define DISABLE_WARNING_NONNULL \ |
67 | _Pragma("GCC diagnostic push"); \ | |
68 | _Pragma("GCC diagnostic ignored \"-Wnonnull\"") | |
69 | ||
d442e2ec DH |
70 | #define DISABLE_WARNING_SHADOW \ |
71 | _Pragma("GCC diagnostic push"); \ | |
72 | _Pragma("GCC diagnostic ignored \"-Wshadow\"") | |
73 | ||
df99a9ef ZJS |
74 | #define DISABLE_WARNING_INCOMPATIBLE_POINTER_TYPES \ |
75 | _Pragma("GCC diagnostic push"); \ | |
76 | _Pragma("GCC diagnostic ignored \"-Wincompatible-pointer-types\"") | |
77 | ||
7ebe131a LP |
78 | #define REENABLE_WARNING \ |
79 | _Pragma("GCC diagnostic pop") | |
80 | ||
49e5de64 ZJS |
81 | /* automake test harness */ |
82 | #define EXIT_TEST_SKIP 77 | |
83 | ||
bef2733f LP |
84 | #define XSTRINGIFY(x) #x |
85 | #define STRINGIFY(x) XSTRINGIFY(x) | |
86 | ||
ab9cbe34 LS |
87 | #define XCONCATENATE(x, y) x ## y |
88 | #define CONCATENATE(x, y) XCONCATENATE(x, y) | |
89 | ||
fb835651 DH |
90 | #define UNIQ_T(x, uniq) CONCATENATE(__unique_prefix_, CONCATENATE(x, uniq)) |
91 | #define UNIQ __COUNTER__ | |
92 | ||
13b498f9 TJ |
93 | /* builtins */ |
94 | #if __SIZEOF_INT__ == 4 | |
95 | #define BUILTIN_FFS_U32(x) __builtin_ffs(x); | |
96 | #elif __SIZEOF_LONG__ == 4 | |
97 | #define BUILTIN_FFS_U32(x) __builtin_ffsl(x); | |
98 | #else | |
99 | #error "neither int nor long are four bytes long?!?" | |
100 | #endif | |
101 | ||
60918275 | 102 | /* Rounds up */ |
9be9c7cf LP |
103 | |
104 | #define ALIGN4(l) (((l) + 3) & ~3) | |
105 | #define ALIGN8(l) (((l) + 7) & ~7) | |
106 | ||
107 | #if __SIZEOF_POINTER__ == 8 | |
108 | #define ALIGN(l) ALIGN8(l) | |
109 | #elif __SIZEOF_POINTER__ == 4 | |
110 | #define ALIGN(l) ALIGN4(l) | |
111 | #else | |
112 | #error "Wut? Pointers are neither 4 nor 8 bytes long?" | |
113 | #endif | |
114 | ||
5f86c1f4 LP |
115 | #define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) (p))) |
116 | #define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) (p))) | |
117 | #define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) (p))) | |
e86b80b8 | 118 | |
37f85e66 | 119 | static inline size_t ALIGN_TO(size_t l, size_t ali) { |
120 | return ((l + ali - 1) & ~(ali - 1)); | |
22be093f LP |
121 | } |
122 | ||
5f86c1f4 | 123 | #define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) (p), (ali))) |
49aa47c7 | 124 | |
625e870b DH |
125 | /* align to next higher power-of-2 (except for: 0 => 0, overflow => 0) */ |
126 | static inline unsigned long ALIGN_POWER2(unsigned long u) { | |
127 | /* clz(0) is undefined */ | |
128 | if (u == 1) | |
129 | return 1; | |
130 | ||
131 | /* left-shift overflow is undefined */ | |
132 | if (__builtin_clzl(u - 1UL) < 1) | |
133 | return 0; | |
134 | ||
135 | return 1UL << (sizeof(u) * 8 - __builtin_clzl(u - 1UL)); | |
136 | } | |
137 | ||
7f39a210 MS |
138 | #define ELEMENTSOF(x) \ |
139 | __extension__ (__builtin_choose_expr( \ | |
140 | !__builtin_types_compatible_p(typeof(x), typeof(&*(x))), \ | |
141 | sizeof(x)/sizeof((x)[0]), \ | |
142 | (void)0)) | |
bbc98d32 KS |
143 | /* |
144 | * container_of - cast a member of a structure out to the containing structure | |
145 | * @ptr: the pointer to the member. | |
146 | * @type: the type of the container struct this is embedded in. | |
147 | * @member: the name of the member within the struct. | |
bbc98d32 | 148 | */ |
fb835651 DH |
149 | #define container_of(ptr, type, member) __container_of(UNIQ, (ptr), type, member) |
150 | #define __container_of(uniq, ptr, type, member) \ | |
fa70beaa | 151 | __extension__ ({ \ |
fb835651 DH |
152 | const typeof( ((type*)0)->member ) *UNIQ_T(A, uniq) = (ptr); \ |
153 | (type*)( (char *)UNIQ_T(A, uniq) - offsetof(type,member) ); \ | |
154 | }) | |
bbc98d32 | 155 | |
9607d947 | 156 | #undef MAX |
667a0377 DH |
157 | #define MAX(a, b) __MAX(UNIQ, (a), UNIQ, (b)) |
158 | #define __MAX(aq, a, bq, b) \ | |
fdcba430 | 159 | __extension__ ({ \ |
667a0377 DH |
160 | const typeof(a) UNIQ_T(A, aq) = (a); \ |
161 | const typeof(b) UNIQ_T(B, bq) = (b); \ | |
162 | UNIQ_T(A,aq) > UNIQ_T(B,bq) ? UNIQ_T(A,aq) : UNIQ_T(B,bq); \ | |
163 | }) | |
60918275 | 164 | |
7242d742 DH |
165 | /* evaluates to (void) if _A or _B are not constant or of different types */ |
166 | #define CONST_MAX(_A, _B) \ | |
167 | __extension__ (__builtin_choose_expr( \ | |
168 | __builtin_constant_p(_A) && \ | |
169 | __builtin_constant_p(_B) && \ | |
170 | __builtin_types_compatible_p(typeof(_A), typeof(_B)), \ | |
171 | ((_A) > (_B)) ? (_A) : (_B), \ | |
172 | (void)0)) | |
173 | ||
40a1eebd DH |
174 | /* takes two types and returns the size of the larger one */ |
175 | #define MAXSIZE(A, B) (sizeof(union _packed_ { typeof(A) a; typeof(B) b; })) | |
176 | ||
fdcba430 DH |
177 | #define MAX3(x,y,z) \ |
178 | __extension__ ({ \ | |
179 | const typeof(x) _c = MAX(x,y); \ | |
180 | MAX(_c, z); \ | |
9607d947 | 181 | }) |
3b63d2d3 | 182 | |
9607d947 | 183 | #undef MIN |
667a0377 DH |
184 | #define MIN(a, b) __MIN(UNIQ, (a), UNIQ, (b)) |
185 | #define __MIN(aq, a, bq, b) \ | |
fdcba430 | 186 | __extension__ ({ \ |
667a0377 DH |
187 | const typeof(a) UNIQ_T(A, aq) = (a); \ |
188 | const typeof(b) UNIQ_T(B, bq) = (b); \ | |
189 | UNIQ_T(A,aq) < UNIQ_T(B,bq) ? UNIQ_T(A,aq) : UNIQ_T(B,bq); \ | |
190 | }) | |
60918275 | 191 | |
fdcba430 DH |
192 | #define MIN3(x,y,z) \ |
193 | __extension__ ({ \ | |
194 | const typeof(x) _c = MIN(x,y); \ | |
195 | MIN(_c, z); \ | |
7df23077 DH |
196 | }) |
197 | ||
667a0377 DH |
198 | #define LESS_BY(a, b) __LESS_BY(UNIQ, (a), UNIQ, (b)) |
199 | #define __LESS_BY(aq, a, bq, b) \ | |
fdcba430 | 200 | __extension__ ({ \ |
667a0377 DH |
201 | const typeof(a) UNIQ_T(A, aq) = (a); \ |
202 | const typeof(b) UNIQ_T(B, bq) = (b); \ | |
203 | UNIQ_T(A,aq) > UNIQ_T(B,bq) ? UNIQ_T(A,aq) - UNIQ_T(B,bq) : 0; \ | |
204 | }) | |
348ced90 | 205 | |
667a0377 DH |
206 | #undef CLAMP |
207 | #define CLAMP(x, low, high) __CLAMP(UNIQ, (x), UNIQ, (low), UNIQ, (high)) | |
208 | #define __CLAMP(xq, x, lowq, low, highq, high) \ | |
60918275 | 209 | __extension__ ({ \ |
667a0377 DH |
210 | const typeof(x) UNIQ_T(X,xq) = (x); \ |
211 | const typeof(low) UNIQ_T(LOW,lowq) = (low); \ | |
212 | const typeof(high) UNIQ_T(HIGH,highq) = (high); \ | |
213 | UNIQ_T(X,xq) > UNIQ_T(HIGH,highq) ? \ | |
214 | UNIQ_T(HIGH,highq) : \ | |
215 | UNIQ_T(X,xq) < UNIQ_T(LOW,lowq) ? \ | |
216 | UNIQ_T(LOW,lowq) : \ | |
217 | UNIQ_T(X,xq); \ | |
218 | }) | |
60918275 | 219 | |
180a60bc DH |
220 | /* [(x + y - 1) / y] suffers from an integer overflow, even though the |
221 | * computation should be possible in the given type. Therefore, we use | |
222 | * [x / y + !!(x % y)]. Note that on "Real CPUs" a division returns both the | |
223 | * quotient and the remainder, so both should be equally fast. */ | |
224 | #define DIV_ROUND_UP(_x, _y) \ | |
225 | __extension__ ({ \ | |
226 | const typeof(_x) __x = (_x); \ | |
227 | const typeof(_y) __y = (_y); \ | |
228 | (__x / __y + !!(__x % __y)); \ | |
229 | }) | |
230 | ||
34c38d2a | 231 | #define assert_message_se(expr, message) \ |
dd8f71ee | 232 | do { \ |
93a46b0b | 233 | if (_unlikely_(!(expr))) \ |
34c38d2a MS |
234 | log_assert_failed(message, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
235 | } while (false) | |
236 | ||
237 | #define assert_se(expr) assert_message_se(expr, #expr) | |
dd8f71ee LP |
238 | |
239 | /* We override the glibc assert() here. */ | |
240 | #undef assert | |
241 | #ifdef NDEBUG | |
9ed794a3 | 242 | #define assert(expr) do {} while (false) |
dd8f71ee | 243 | #else |
34c38d2a | 244 | #define assert(expr) assert_message_se(expr, #expr) |
dd8f71ee | 245 | #endif |
60918275 | 246 | |
dd8f71ee LP |
247 | #define assert_not_reached(t) \ |
248 | do { \ | |
b7f33638 | 249 | log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
dd8f71ee | 250 | } while (false) |
60918275 | 251 | |
f791c684 | 252 | #if defined(static_assert) |
7ebe131a LP |
253 | /* static_assert() is sometimes defined in a way that trips up |
254 | * -Wdeclaration-after-statement, hence let's temporarily turn off | |
255 | * this warning around it. */ | |
256 | #define assert_cc(expr) \ | |
257 | DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \ | |
258 | static_assert(expr, #expr); \ | |
259 | REENABLE_WARNING | |
f791c684 | 260 | #else |
7ebe131a LP |
261 | #define assert_cc(expr) \ |
262 | DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \ | |
6825a04d | 263 | struct CONCATENATE(_assert_struct_, __COUNTER__) { \ |
7ebe131a LP |
264 | char x[(expr) ? 0 : -1]; \ |
265 | }; \ | |
266 | REENABLE_WARNING | |
f791c684 | 267 | #endif |
60918275 | 268 | |
34c38d2a MS |
269 | #define assert_log(expr, message) ((_likely_(expr)) \ |
270 | ? (true) \ | |
271 | : (log_assert_failed_return(message, __FILE__, __LINE__, __PRETTY_FUNCTION__), false)) | |
366e6411 | 272 | |
80514f9c LP |
273 | #define assert_return(expr, r) \ |
274 | do { \ | |
34c38d2a | 275 | if (!assert_log(expr, #expr)) \ |
80514f9c | 276 | return (r); \ |
18387b59 LP |
277 | } while (false) |
278 | ||
aa029628 TG |
279 | #define assert_return_errno(expr, r, err) \ |
280 | do { \ | |
34c38d2a | 281 | if (!assert_log(expr, #expr)) { \ |
aa029628 TG |
282 | errno = err; \ |
283 | return (r); \ | |
284 | } \ | |
285 | } while (false) | |
286 | ||
a3dc3547 KS |
287 | #define PTR_TO_INT(p) ((int) ((intptr_t) (p))) |
288 | #define INT_TO_PTR(u) ((void *) ((intptr_t) (u))) | |
60918275 | 289 | #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p))) |
a3dc3547 | 290 | #define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
60918275 | 291 | |
a3dc3547 KS |
292 | #define PTR_TO_LONG(p) ((long) ((intptr_t) (p))) |
293 | #define LONG_TO_PTR(u) ((void *) ((intptr_t) (u))) | |
c6c18be3 | 294 | #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p))) |
a3dc3547 | 295 | #define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
c6c18be3 | 296 | |
a3dc3547 KS |
297 | #define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p))) |
298 | #define INT32_TO_PTR(u) ((void *) ((intptr_t) (u))) | |
299 | #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p))) | |
300 | #define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u))) | |
60918275 | 301 | |
a3dc3547 KS |
302 | #define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p))) |
303 | #define INT64_TO_PTR(u) ((void *) ((intptr_t) (u))) | |
304 | #define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p))) | |
305 | #define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u))) | |
c6c18be3 | 306 | |
74b2466e LP |
307 | #define PTR_TO_SIZE(p) ((size_t) ((uintptr_t) (p))) |
308 | #define SIZE_TO_PTR(u) ((void *) ((uintptr_t) (u))) | |
309 | ||
a9c55a88 LP |
310 | #define CHAR_TO_STR(x) ((char[2]) { x, 0 }) |
311 | ||
034c6ed7 LP |
312 | #define char_array_0(x) x[sizeof(x)-1] = 0; |
313 | ||
fa70beaa LP |
314 | /* Returns the number of chars needed to format variables of the |
315 | * specified type as a decimal string. Adds in extra space for a | |
b7ce6b59 LP |
316 | * negative '-' prefix (hence works correctly on signed |
317 | * types). Includes space for the trailing NUL. */ | |
fa70beaa | 318 | #define DECIMAL_STR_MAX(type) \ |
5bcb0f2b | 319 | (2+(sizeof(type) <= 1 ? 3 : \ |
fa70beaa LP |
320 | sizeof(type) <= 2 ? 5 : \ |
321 | sizeof(type) <= 4 ? 10 : \ | |
322 | sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)]))) | |
323 | ||
0d1dbeb3 LP |
324 | #define DECIMAL_STR_WIDTH(x) \ |
325 | ({ \ | |
326 | typeof(x) _x_ = (x); \ | |
327 | unsigned ans = 1; \ | |
328 | while (_x_ /= 10) \ | |
329 | ans++; \ | |
330 | ans; \ | |
331 | }) | |
332 | ||
264ad849 LP |
333 | #define SET_FLAG(v, flag, b) \ |
334 | (v) = (b) ? ((v) | (flag)) : ((v) & ~(flag)) | |
335 | ||
d5b26d50 DM |
336 | #define CASE_F(X) case X: |
337 | #define CASE_F_1(CASE, X) CASE_F(X) | |
338 | #define CASE_F_2(CASE, X, ...) CASE(X) CASE_F_1(CASE, __VA_ARGS__) | |
339 | #define CASE_F_3(CASE, X, ...) CASE(X) CASE_F_2(CASE, __VA_ARGS__) | |
340 | #define CASE_F_4(CASE, X, ...) CASE(X) CASE_F_3(CASE, __VA_ARGS__) | |
341 | #define CASE_F_5(CASE, X, ...) CASE(X) CASE_F_4(CASE, __VA_ARGS__) | |
342 | #define CASE_F_6(CASE, X, ...) CASE(X) CASE_F_5(CASE, __VA_ARGS__) | |
343 | #define CASE_F_7(CASE, X, ...) CASE(X) CASE_F_6(CASE, __VA_ARGS__) | |
344 | #define CASE_F_8(CASE, X, ...) CASE(X) CASE_F_7(CASE, __VA_ARGS__) | |
345 | #define CASE_F_9(CASE, X, ...) CASE(X) CASE_F_8(CASE, __VA_ARGS__) | |
346 | #define CASE_F_10(CASE, X, ...) CASE(X) CASE_F_9(CASE, __VA_ARGS__) | |
347 | #define CASE_F_11(CASE, X, ...) CASE(X) CASE_F_10(CASE, __VA_ARGS__) | |
348 | #define CASE_F_12(CASE, X, ...) CASE(X) CASE_F_11(CASE, __VA_ARGS__) | |
349 | #define CASE_F_13(CASE, X, ...) CASE(X) CASE_F_12(CASE, __VA_ARGS__) | |
350 | #define CASE_F_14(CASE, X, ...) CASE(X) CASE_F_13(CASE, __VA_ARGS__) | |
351 | #define CASE_F_15(CASE, X, ...) CASE(X) CASE_F_14(CASE, __VA_ARGS__) | |
352 | #define CASE_F_16(CASE, X, ...) CASE(X) CASE_F_15(CASE, __VA_ARGS__) | |
353 | #define CASE_F_17(CASE, X, ...) CASE(X) CASE_F_16(CASE, __VA_ARGS__) | |
354 | #define CASE_F_18(CASE, X, ...) CASE(X) CASE_F_17(CASE, __VA_ARGS__) | |
355 | #define CASE_F_19(CASE, X, ...) CASE(X) CASE_F_18(CASE, __VA_ARGS__) | |
356 | #define CASE_F_20(CASE, X, ...) CASE(X) CASE_F_19(CASE, __VA_ARGS__) | |
357 | ||
358 | #define GET_CASE_F(_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,_19,_20,NAME,...) NAME | |
359 | #define FOR_EACH_MAKE_CASE(...) \ | |
360 | GET_CASE_F(__VA_ARGS__,CASE_F_20,CASE_F_19,CASE_F_18,CASE_F_17,CASE_F_16,CASE_F_15,CASE_F_14,CASE_F_13,CASE_F_12,CASE_F_11, \ | |
361 | CASE_F_10,CASE_F_9,CASE_F_8,CASE_F_7,CASE_F_6,CASE_F_5,CASE_F_4,CASE_F_3,CASE_F_2,CASE_F_1) \ | |
362 | (CASE_F,__VA_ARGS__) | |
363 | ||
364 | #define IN_SET(x, ...) \ | |
365 | ({ \ | |
366 | bool _found = false; \ | |
367 | /* If the build breaks in the line below, you need to extend the case macros */ \ | |
368 | static _unused_ char _static_assert__macros_need_to_be_extended[20 - sizeof((int[]){__VA_ARGS__})/sizeof(int)]; \ | |
369 | switch(x) { \ | |
370 | FOR_EACH_MAKE_CASE(__VA_ARGS__) \ | |
371 | _found = true; \ | |
372 | break; \ | |
373 | default: \ | |
374 | break; \ | |
375 | } \ | |
376 | _found; \ | |
cabb7806 LP |
377 | }) |
378 | ||
35aa04e9 LP |
379 | #define SWAP_TWO(x, y) do { \ |
380 | typeof(x) _t = (x); \ | |
381 | (x) = (y); \ | |
382 | (y) = (_t); \ | |
383 | } while (false) | |
384 | ||
919ce0b7 SL |
385 | /* Define C11 thread_local attribute even on older gcc compiler |
386 | * version */ | |
ec202eae SL |
387 | #ifndef thread_local |
388 | /* | |
389 | * Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__ | |
390 | * see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769 | |
391 | */ | |
392 | #if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) || (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16)) | |
393 | #define thread_local _Thread_local | |
394 | #else | |
395 | #define thread_local __thread | |
396 | #endif | |
397 | #endif | |
cabb7806 | 398 | |
919ce0b7 SL |
399 | /* Define C11 noreturn without <stdnoreturn.h> and even on older gcc |
400 | * compiler versions */ | |
401 | #ifndef noreturn | |
402 | #if __STDC_VERSION__ >= 201112L | |
403 | #define noreturn _Noreturn | |
404 | #else | |
405 | #define noreturn __attribute__((noreturn)) | |
406 | #endif | |
407 | #endif | |
408 | ||
a2341f68 ZJS |
409 | #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \ |
410 | static inline void func##p(type *p) { \ | |
411 | if (*p) \ | |
412 | func(*p); \ | |
413 | } \ | |
414 | struct __useless_struct_to_allow_trailing_semicolon__ | |
415 | ||
dd8f71ee | 416 | #include "log.h" |