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03467c88 | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
c2f1db8f | 3 | #pragma once |
60918275 | 4 | |
a7334b09 LP |
5 | /*** |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2010 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
13 | (at your option) any later version. |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 18 | Lesser General Public License for more details. |
a7334b09 | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | ***/ | |
23 | ||
60918275 | 24 | #include <assert.h> |
6a39419f | 25 | #include <sys/param.h> |
60918275 | 26 | #include <sys/types.h> |
c31e1495 LP |
27 | #include <sys/uio.h> |
28 | #include <inttypes.h> | |
60918275 | 29 | |
44b601bc | 30 | #define _printf_(a,b) __attribute__ ((format (printf, a, b))) |
750ef272 | 31 | #define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__))) |
93a46b0b | 32 | #define _sentinel_ __attribute__ ((sentinel)) |
93a46b0b LP |
33 | #define _unused_ __attribute__ ((unused)) |
34 | #define _destructor_ __attribute__ ((destructor)) | |
35 | #define _pure_ __attribute__ ((pure)) | |
36 | #define _const_ __attribute__ ((const)) | |
37 | #define _deprecated_ __attribute__ ((deprecated)) | |
38 | #define _packed_ __attribute__ ((packed)) | |
39 | #define _malloc_ __attribute__ ((malloc)) | |
40 | #define _weak_ __attribute__ ((weak)) | |
41 | #define _likely_(x) (__builtin_expect(!!(x),1)) | |
42 | #define _unlikely_(x) (__builtin_expect(!!(x),0)) | |
40473a70 LP |
43 | #define _public_ __attribute__ ((visibility("default"))) |
44 | #define _hidden_ __attribute__ ((visibility("hidden"))) | |
ad780f19 | 45 | #define _weakref_(x) __attribute__((weakref(#x))) |
19d1e4ee | 46 | #define _alignas_(x) __attribute__((aligned(__alignof(x)))) |
dfb33a97 | 47 | #define _cleanup_(x) __attribute__((cleanup(x))) |
60918275 | 48 | |
49e5de64 ZJS |
49 | /* automake test harness */ |
50 | #define EXIT_TEST_SKIP 77 | |
51 | ||
bef2733f LP |
52 | #define XSTRINGIFY(x) #x |
53 | #define STRINGIFY(x) XSTRINGIFY(x) | |
54 | ||
ab9cbe34 LS |
55 | #define XCONCATENATE(x, y) x ## y |
56 | #define CONCATENATE(x, y) XCONCATENATE(x, y) | |
57 | ||
58 | #define UNIQUE(prefix) CONCATENATE(prefix, __LINE__) | |
59 | ||
60918275 | 60 | /* Rounds up */ |
9be9c7cf LP |
61 | |
62 | #define ALIGN4(l) (((l) + 3) & ~3) | |
63 | #define ALIGN8(l) (((l) + 7) & ~7) | |
64 | ||
65 | #if __SIZEOF_POINTER__ == 8 | |
66 | #define ALIGN(l) ALIGN8(l) | |
67 | #elif __SIZEOF_POINTER__ == 4 | |
68 | #define ALIGN(l) ALIGN4(l) | |
69 | #else | |
70 | #error "Wut? Pointers are neither 4 nor 8 bytes long?" | |
71 | #endif | |
72 | ||
49aa47c7 LP |
73 | #define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) p)) |
74 | #define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) p)) | |
e86b80b8 LP |
75 | #define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p)) |
76 | ||
37f85e66 | 77 | static inline size_t ALIGN_TO(size_t l, size_t ali) { |
78 | return ((l + ali - 1) & ~(ali - 1)); | |
22be093f LP |
79 | } |
80 | ||
49aa47c7 LP |
81 | #define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) p)) |
82 | ||
60918275 LP |
83 | #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0])) |
84 | ||
bbc98d32 KS |
85 | /* |
86 | * container_of - cast a member of a structure out to the containing structure | |
87 | * @ptr: the pointer to the member. | |
88 | * @type: the type of the container struct this is embedded in. | |
89 | * @member: the name of the member within the struct. | |
90 | * | |
91 | */ | |
fa70beaa LP |
92 | #define container_of(ptr, type, member) \ |
93 | __extension__ ({ \ | |
94 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ | |
95 | (type *)( (char *)__mptr - offsetof(type,member) ); \ | |
96 | }) | |
bbc98d32 | 97 | |
9607d947 CR |
98 | #undef MAX |
99 | #define MAX(a,b) \ | |
100 | __extension__ ({ \ | |
101 | typeof(a) _a = (a); \ | |
102 | typeof(b) _b = (b); \ | |
103 | _a > _b ? _a : _b; \ | |
60918275 LP |
104 | }) |
105 | ||
9607d947 CR |
106 | #define MAX3(x,y,z) \ |
107 | __extension__ ({ \ | |
108 | typeof(x) _c = MAX(x,y); \ | |
109 | MAX(_c, z); \ | |
110 | }) | |
3b63d2d3 | 111 | |
9607d947 | 112 | #undef MIN |
60918275 LP |
113 | #define MIN(a,b) \ |
114 | __extension__ ({ \ | |
115 | typeof(a) _a = (a); \ | |
116 | typeof(b) _b = (b); \ | |
117 | _a < _b ? _a : _b; \ | |
118 | }) | |
119 | ||
907809fc | 120 | #ifndef CLAMP |
60918275 LP |
121 | #define CLAMP(x, low, high) \ |
122 | __extension__ ({ \ | |
123 | typeof(x) _x = (x); \ | |
124 | typeof(low) _low = (low); \ | |
125 | typeof(high) _high = (high); \ | |
126 | ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \ | |
127 | }) | |
907809fc | 128 | #endif |
60918275 | 129 | |
dd8f71ee LP |
130 | #define assert_se(expr) \ |
131 | do { \ | |
93a46b0b | 132 | if (_unlikely_(!(expr))) \ |
b7f33638 | 133 | log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
dd8f71ee LP |
134 | } while (false) \ |
135 | ||
136 | /* We override the glibc assert() here. */ | |
137 | #undef assert | |
138 | #ifdef NDEBUG | |
139 | #define assert(expr) do {} while(false) | |
140 | #else | |
141 | #define assert(expr) assert_se(expr) | |
142 | #endif | |
60918275 | 143 | |
dd8f71ee LP |
144 | #define assert_not_reached(t) \ |
145 | do { \ | |
b7f33638 | 146 | log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
dd8f71ee | 147 | } while (false) |
60918275 | 148 | |
f791c684 | 149 | #if defined(static_assert) |
780dbeef | 150 | #define assert_cc(expr) static_assert(expr, #expr) |
f791c684 | 151 | #else |
ab9cbe34 | 152 | #define assert_cc(expr) struct UNIQUE(_assert_struct_) { char x[(expr) ? 0 : -1]; }; |
f791c684 | 153 | #endif |
60918275 | 154 | |
80514f9c LP |
155 | #define assert_return(expr, r) \ |
156 | do { \ | |
157 | if (_unlikely_(!(expr))) { \ | |
158 | log_assert_failed_return(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ | |
159 | return (r); \ | |
160 | } \ | |
18387b59 LP |
161 | } while (false) |
162 | ||
a3dc3547 KS |
163 | #define PTR_TO_INT(p) ((int) ((intptr_t) (p))) |
164 | #define INT_TO_PTR(u) ((void *) ((intptr_t) (u))) | |
60918275 | 165 | #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p))) |
a3dc3547 | 166 | #define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
60918275 | 167 | |
a3dc3547 KS |
168 | #define PTR_TO_LONG(p) ((long) ((intptr_t) (p))) |
169 | #define LONG_TO_PTR(u) ((void *) ((intptr_t) (u))) | |
c6c18be3 | 170 | #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p))) |
a3dc3547 | 171 | #define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
c6c18be3 | 172 | |
a3dc3547 KS |
173 | #define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p))) |
174 | #define INT32_TO_PTR(u) ((void *) ((intptr_t) (u))) | |
175 | #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p))) | |
176 | #define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u))) | |
60918275 | 177 | |
a3dc3547 KS |
178 | #define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p))) |
179 | #define INT64_TO_PTR(u) ((void *) ((intptr_t) (u))) | |
180 | #define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p))) | |
181 | #define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u))) | |
c6c18be3 | 182 | |
476fe607 LP |
183 | #define memzero(x,l) (memset((x), 0, (l))) |
184 | #define zero(x) (memzero(&(x), sizeof(x))) | |
185 | ||
a9c55a88 LP |
186 | #define CHAR_TO_STR(x) ((char[2]) { x, 0 }) |
187 | ||
034c6ed7 LP |
188 | #define char_array_0(x) x[sizeof(x)-1] = 0; |
189 | ||
bff7c062 | 190 | #define IOVEC_SET_STRING(i, s) \ |
2fa086a8 | 191 | do { \ |
bff7c062 LP |
192 | struct iovec *_i = &(i); \ |
193 | char *_s = (char *)(s); \ | |
194 | _i->iov_base = _s; \ | |
195 | _i->iov_len = strlen(_s); \ | |
9b3c575e | 196 | } while(false) |
2fa086a8 | 197 | |
c31e1495 LP |
198 | static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) { |
199 | unsigned j; | |
200 | size_t r = 0; | |
201 | ||
202 | for (j = 0; j < n; j++) | |
203 | r += i[j].iov_len; | |
204 | ||
205 | return r; | |
206 | } | |
207 | ||
208 | static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) { | |
209 | unsigned j; | |
210 | ||
211 | for (j = 0; j < n; j++) { | |
212 | size_t sub; | |
213 | ||
214 | if (_unlikely_(k <= 0)) | |
215 | break; | |
216 | ||
217 | sub = MIN(i[j].iov_len, k); | |
218 | i[j].iov_len -= sub; | |
219 | i[j].iov_base = (uint8_t*) i[j].iov_base + sub; | |
220 | k -= sub; | |
221 | } | |
222 | ||
223 | return k; | |
224 | } | |
225 | ||
cecd32f6 LP |
226 | #define VA_FORMAT_ADVANCE(format, ap) \ |
227 | do { \ | |
228 | int _argtypes[128]; \ | |
963ddb91 LP |
229 | size_t _i, _k; \ |
230 | _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \ | |
cecd32f6 | 231 | assert(_k < ELEMENTSOF(_argtypes)); \ |
963ddb91 LP |
232 | for (_i = 0; _i < _k; _i++) { \ |
233 | if (_argtypes[_i] & PA_FLAG_PTR) { \ | |
234 | (void) va_arg(ap, void*); \ | |
235 | continue; \ | |
236 | } \ | |
237 | \ | |
238 | switch (_argtypes[_i]) { \ | |
239 | case PA_INT: \ | |
240 | case PA_INT|PA_FLAG_SHORT: \ | |
241 | case PA_CHAR: \ | |
242 | (void) va_arg(ap, int); \ | |
243 | break; \ | |
244 | case PA_INT|PA_FLAG_LONG: \ | |
245 | (void) va_arg(ap, long int); \ | |
246 | break; \ | |
247 | case PA_INT|PA_FLAG_LONG_LONG: \ | |
248 | (void) va_arg(ap, long long int); \ | |
249 | break; \ | |
250 | case PA_WCHAR: \ | |
251 | (void) va_arg(ap, wchar_t); \ | |
252 | break; \ | |
253 | case PA_WSTRING: \ | |
254 | case PA_STRING: \ | |
255 | case PA_POINTER: \ | |
256 | (void) va_arg(ap, void*); \ | |
257 | break; \ | |
258 | case PA_FLOAT: \ | |
259 | case PA_DOUBLE: \ | |
260 | (void) va_arg(ap, double); \ | |
261 | break; \ | |
262 | case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: \ | |
263 | (void) va_arg(ap, long double); \ | |
264 | break; \ | |
265 | default: \ | |
266 | assert_not_reached("Unknown format string argument."); \ | |
267 | } \ | |
268 | } \ | |
269 | } while(false) | |
270 | ||
e5f476db | 271 | /* Because statfs.t_type can be int on some architectures, we have to cast |
bdd29249 HH |
272 | * the const magic to the type, otherwise the compiler warns about |
273 | * signed/unsigned comparison, because the magic can be 32 bit unsigned. | |
274 | */ | |
c51cf056 | 275 | #define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b) |
bdd29249 | 276 | |
fa70beaa LP |
277 | /* Returns the number of chars needed to format variables of the |
278 | * specified type as a decimal string. Adds in extra space for a | |
279 | * negative '-' prefix. */ | |
fa70beaa | 280 | #define DECIMAL_STR_MAX(type) \ |
5bcb0f2b | 281 | (2+(sizeof(type) <= 1 ? 3 : \ |
fa70beaa LP |
282 | sizeof(type) <= 2 ? 5 : \ |
283 | sizeof(type) <= 4 ? 10 : \ | |
284 | sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)]))) | |
285 | ||
264ad849 LP |
286 | #define SET_FLAG(v, flag, b) \ |
287 | (v) = (b) ? ((v) | (flag)) : ((v) & ~(flag)) | |
288 | ||
059d9fbb LP |
289 | #define IN_SET(x, ...) \ |
290 | ({ \ | |
291 | const typeof(x) _x = (x); \ | |
292 | unsigned _i; \ | |
293 | bool _found = false; \ | |
294 | for (_i = 0; _i < sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \ | |
295 | if (((const typeof(_x)[]) { __VA_ARGS__ })[_i] == _x) { \ | |
296 | _found = true; \ | |
297 | break; \ | |
298 | } \ | |
299 | _found; \ | |
cabb7806 LP |
300 | }) |
301 | ||
919ce0b7 SL |
302 | /* Define C11 thread_local attribute even on older gcc compiler |
303 | * version */ | |
ec202eae SL |
304 | #ifndef thread_local |
305 | /* | |
306 | * Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__ | |
307 | * see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769 | |
308 | */ | |
309 | #if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) || (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16)) | |
310 | #define thread_local _Thread_local | |
311 | #else | |
312 | #define thread_local __thread | |
313 | #endif | |
314 | #endif | |
cabb7806 | 315 | |
919ce0b7 SL |
316 | /* Define C11 noreturn without <stdnoreturn.h> and even on older gcc |
317 | * compiler versions */ | |
318 | #ifndef noreturn | |
319 | #if __STDC_VERSION__ >= 201112L | |
320 | #define noreturn _Noreturn | |
321 | #else | |
322 | #define noreturn __attribute__((noreturn)) | |
323 | #endif | |
324 | #endif | |
325 | ||
dd8f71ee | 326 | #include "log.h" |