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Commit | Line | Data |
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064af421 | 1 | /* |
b54d69df | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Nicira, Inc. |
064af421 | 3 | * |
a14bc59f BP |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
064af421 | 7 | * |
a14bc59f BP |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
064af421 BP |
15 | */ |
16 | ||
17 | #ifndef UTIL_H | |
18 | #define UTIL_H 1 | |
19 | ||
b2fc6a74 | 20 | #include <arpa/inet.h> |
437d0d22 | 21 | #include <inttypes.h> |
a656cb77 | 22 | #include <limits.h> |
91883334 | 23 | #include <stdarg.h> |
064af421 | 24 | #include <stdio.h> |
ccc09689 | 25 | #include <stdlib.h> |
064af421 BP |
26 | #include <string.h> |
27 | #include "compiler.h" | |
ee89ea7b | 28 | #include "util.h" |
b0248b2a | 29 | #include "openvswitch/util.h" |
064af421 | 30 | |
91e12f0d | 31 | extern char *program_name; |
064af421 | 32 | |
878f1972 FL |
33 | #define __ARRAY_SIZE_NOCHECK(ARRAY) (sizeof(ARRAY) / sizeof((ARRAY)[0])) |
34 | #ifdef __GNUC__ | |
35 | /* return 0 for array types, 1 otherwise */ | |
36 | #define __ARRAY_CHECK(ARRAY) \ | |
37 | !__builtin_types_compatible_p(typeof(ARRAY), typeof(&ARRAY[0])) | |
38 | ||
39 | /* compile-time fail if not array */ | |
40 | #define __ARRAY_FAIL(ARRAY) (sizeof(char[-2*!__ARRAY_CHECK(ARRAY)])) | |
41 | #define __ARRAY_SIZE(ARRAY) \ | |
42 | __builtin_choose_expr(__ARRAY_CHECK(ARRAY), \ | |
43 | __ARRAY_SIZE_NOCHECK(ARRAY), __ARRAY_FAIL(ARRAY)) | |
44 | #else | |
45 | #define __ARRAY_SIZE(ARRAY) __ARRAY_SIZE_NOCHECK(ARRAY) | |
46 | #endif | |
47 | ||
e93ab553 | 48 | |
e2051008 BP |
49 | /* This system's cache line size, in bytes. |
50 | * Being wrong hurts performance but not correctness. */ | |
51 | #define CACHE_LINE_SIZE 64 | |
52 | BUILD_ASSERT_DECL(IS_POW2(CACHE_LINE_SIZE)); | |
53 | ||
124f09c9 JR |
54 | static inline void |
55 | ovs_prefetch_range(const void *start, size_t size) | |
56 | { | |
57 | const char *addr = (const char *)start; | |
58 | size_t ofs; | |
59 | ||
60 | for (ofs = 0; ofs < size; ofs += CACHE_LINE_SIZE) { | |
61 | OVS_PREFETCH(addr + ofs); | |
62 | } | |
63 | } | |
64 | ||
064af421 BP |
65 | #ifndef MIN |
66 | #define MIN(X, Y) ((X) < (Y) ? (X) : (Y)) | |
67 | #endif | |
68 | ||
69 | #ifndef MAX | |
70 | #define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) | |
71 | #endif | |
72 | ||
a489b168 DDP |
73 | /* Comparisons for ints with modular arithmetic */ |
74 | #define INT_MOD_LT(a,b) ((int) ((a)-(b)) < 0) | |
75 | #define INT_MOD_LEQ(a,b) ((int) ((a)-(b)) <= 0) | |
76 | #define INT_MOD_GT(a,b) ((int) ((a)-(b)) > 0) | |
77 | #define INT_MOD_GEQ(a,b) ((int) ((a)-(b)) >= 0) | |
78 | ||
79 | #define INT_MOD_MIN(a, b) ((INT_MOD_LT(a, b)) ? (a) : (b)) | |
80 | #define INT_MOD_MAX(a, b) ((INT_MOD_GT(a, b)) ? (a) : (b)) | |
81 | ||
428b2edd | 82 | #define OVS_NOT_REACHED() abort() |
064af421 | 83 | |
34582733 AS |
84 | /* Use "%"PRIuSIZE to format size_t with printf(). */ |
85 | #ifdef _WIN32 | |
86 | #define PRIdSIZE "Id" | |
87 | #define PRIiSIZE "Ii" | |
88 | #define PRIoSIZE "Io" | |
89 | #define PRIuSIZE "Iu" | |
90 | #define PRIxSIZE "Ix" | |
91 | #define PRIXSIZE "IX" | |
92 | #else | |
93 | #define PRIdSIZE "zd" | |
94 | #define PRIiSIZE "zi" | |
95 | #define PRIoSIZE "zo" | |
96 | #define PRIuSIZE "zu" | |
97 | #define PRIxSIZE "zx" | |
98 | #define PRIXSIZE "zX" | |
99 | #endif | |
100 | ||
b57c6aaa BP |
101 | #ifndef _WIN32 |
102 | typedef uint32_t HANDLE; | |
103 | #endif | |
104 | ||
064af421 BP |
105 | #ifdef __cplusplus |
106 | extern "C" { | |
107 | #endif | |
108 | ||
55d5bb44 | 109 | #define set_program_name(name) \ |
b0248b2a | 110 | ovs_set_program_name(name, OVS_PACKAGE_VERSION) |
064af421 | 111 | |
bc9fb3a9 | 112 | const char *get_subprogram_name(void); |
40e7cf56 | 113 | void set_subprogram_name(const char *); |
bc9fb3a9 | 114 | |
55d5bb44 | 115 | void ovs_print_version(uint8_t min_ofp, uint8_t max_ofp); |
064af421 | 116 | |
cab50449 | 117 | OVS_NO_RETURN void out_of_memory(void); |
064af421 BP |
118 | void *xmalloc(size_t) MALLOC_LIKE; |
119 | void *xcalloc(size_t, size_t) MALLOC_LIKE; | |
ec6fde61 | 120 | void *xzalloc(size_t) MALLOC_LIKE; |
064af421 BP |
121 | void *xrealloc(void *, size_t); |
122 | void *xmemdup(const void *, size_t) MALLOC_LIKE; | |
123 | char *xmemdup0(const char *, size_t) MALLOC_LIKE; | |
124 | char *xstrdup(const char *) MALLOC_LIKE; | |
2225c0b9 | 125 | char *nullable_xstrdup(const char *) MALLOC_LIKE; |
aacf18c3 | 126 | bool nullable_string_is_equal(const char *a, const char *b); |
cab50449 TG |
127 | char *xasprintf(const char *format, ...) OVS_PRINTF_FORMAT(1, 2) MALLOC_LIKE; |
128 | char *xvasprintf(const char *format, va_list) OVS_PRINTF_FORMAT(1, 0) MALLOC_LIKE; | |
064af421 BP |
129 | void *x2nrealloc(void *p, size_t *n, size_t s); |
130 | ||
2fec66db BP |
131 | void *xmalloc_cacheline(size_t) MALLOC_LIKE; |
132 | void *xzalloc_cacheline(size_t) MALLOC_LIKE; | |
133 | void free_cacheline(void *); | |
134 | ||
064af421 | 135 | void ovs_strlcpy(char *dst, const char *src, size_t size); |
71d7c22f | 136 | void ovs_strzcpy(char *dst, const char *src, size_t size); |
064af421 | 137 | |
cab50449 TG |
138 | OVS_NO_RETURN void ovs_abort(int err_no, const char *format, ...) |
139 | OVS_PRINTF_FORMAT(2, 3); | |
140 | OVS_NO_RETURN void ovs_abort_valist(int err_no, const char *format, va_list) | |
141 | OVS_PRINTF_FORMAT(2, 0); | |
142 | OVS_NO_RETURN void ovs_fatal(int err_no, const char *format, ...) | |
143 | OVS_PRINTF_FORMAT(2, 3); | |
144 | OVS_NO_RETURN void ovs_fatal_valist(int err_no, const char *format, va_list) | |
145 | OVS_PRINTF_FORMAT(2, 0); | |
146 | void ovs_error(int err_no, const char *format, ...) OVS_PRINTF_FORMAT(2, 3); | |
c1c8308a | 147 | void ovs_error_valist(int err_no, const char *format, va_list) |
cab50449 | 148 | OVS_PRINTF_FORMAT(2, 0); |
c18ea70d | 149 | const char *ovs_retval_to_string(int); |
5fcbed74 | 150 | const char *ovs_strerror(int); |
064af421 BP |
151 | void ovs_hex_dump(FILE *, const void *, size_t, uintptr_t offset, bool ascii); |
152 | ||
153 | bool str_to_int(const char *, int base, int *); | |
154 | bool str_to_long(const char *, int base, long *); | |
155 | bool str_to_llong(const char *, int base, long long *); | |
1ab39058 | 156 | bool str_to_llong_with_tail(const char *, char **, int base, long long *); |
4c21aa06 | 157 | bool str_to_uint(const char *, int base, unsigned int *); |
1ab39058 | 158 | bool str_to_llong_range(const char *, int base, long long *, long long *); |
064af421 | 159 | |
cab50449 | 160 | bool ovs_scan(const char *s, const char *format, ...) OVS_SCANF_FORMAT(2, 3); |
f071cbba | 161 | bool ovs_scan_len(const char *s, int *n, const char *format, ...); |
ed2232fc | 162 | |
f38b84ea BP |
163 | bool str_to_double(const char *, double *); |
164 | ||
165 | int hexit_value(int c); | |
0429d959 | 166 | uintmax_t hexits_value(const char *s, size_t n, bool *ok); |
f38b84ea | 167 | |
e7ae59f9 JG |
168 | int parse_int_string(const char *s, uint8_t *valuep, int field_width, |
169 | char **tail); | |
170 | ||
44b4d050 BP |
171 | const char *english_list_delimiter(size_t index, size_t total); |
172 | ||
daf03c53 | 173 | char *get_cwd(void); |
3c1150ce | 174 | #ifndef _WIN32 |
29d4af60 | 175 | char *dir_name(const char *file_name); |
e1aff6f9 | 176 | char *base_name(const char *file_name); |
3c1150ce | 177 | #endif |
daf03c53 | 178 | char *abs_file_name(const char *dir, const char *file_name); |
29d4af60 | 179 | |
fee0c963 BP |
180 | char *follow_symlinks(const char *filename); |
181 | ||
c69ee87c | 182 | void ignore(bool x OVS_UNUSED); |
fe9d0898 BP |
183 | \f |
184 | /* Bitwise tests. */ | |
0ee140fb | 185 | |
d43d314e BP |
186 | /* Returns the number of trailing 0-bits in 'n'. Undefined if 'n' == 0. */ |
187 | #if __GNUC__ >= 4 | |
0ee140fb | 188 | static inline int |
d43d314e | 189 | raw_ctz(uint64_t n) |
0ee140fb | 190 | { |
d43d314e BP |
191 | /* With GCC 4.7 on 32-bit x86, if a 32-bit integer is passed as 'n', using |
192 | * a plain __builtin_ctzll() here always generates an out-of-line function | |
193 | * call. The test below helps it to emit a single 'bsf' instruction. */ | |
194 | return (__builtin_constant_p(n <= UINT32_MAX) && n <= UINT32_MAX | |
195 | ? __builtin_ctz(n) | |
196 | : __builtin_ctzll(n)); | |
0ee140fb | 197 | } |
8c947903 JR |
198 | |
199 | static inline int | |
200 | raw_clz64(uint64_t n) | |
201 | { | |
202 | return __builtin_clzll(n); | |
203 | } | |
25f45143 GS |
204 | #elif _MSC_VER |
205 | static inline int | |
206 | raw_ctz(uint64_t n) | |
207 | { | |
208 | #ifdef _WIN64 | |
99970e95 | 209 | unsigned long r = 0; |
25f45143 GS |
210 | _BitScanForward64(&r, n); |
211 | return r; | |
212 | #else | |
99970e95 | 213 | unsigned long low = n, high, r = 0; |
25f45143 GS |
214 | if (_BitScanForward(&r, low)) { |
215 | return r; | |
216 | } | |
217 | high = n >> 32; | |
218 | _BitScanForward(&r, high); | |
219 | return r + 32; | |
220 | #endif | |
221 | } | |
222 | ||
223 | static inline int | |
224 | raw_clz64(uint64_t n) | |
225 | { | |
226 | #ifdef _WIN64 | |
99970e95 | 227 | unsigned long r = 0; |
25f45143 GS |
228 | _BitScanReverse64(&r, n); |
229 | return 63 - r; | |
230 | #else | |
99970e95 | 231 | unsigned long low, high = n >> 32, r = 0; |
25f45143 GS |
232 | if (_BitScanReverse(&r, high)) { |
233 | return 31 - r; | |
234 | } | |
235 | low = n; | |
236 | _BitScanReverse(&r, low); | |
237 | return 63 - r; | |
238 | #endif | |
239 | } | |
0ee140fb BP |
240 | #else |
241 | /* Defined in util.c. */ | |
d43d314e | 242 | int raw_ctz(uint64_t n); |
8c947903 | 243 | int raw_clz64(uint64_t n); |
0ee140fb BP |
244 | #endif |
245 | ||
246 | /* Returns the number of trailing 0-bits in 'n', or 32 if 'n' is 0. */ | |
247 | static inline int | |
d578065e | 248 | ctz32(uint32_t n) |
0ee140fb BP |
249 | { |
250 | return n ? raw_ctz(n) : 32; | |
251 | } | |
252 | ||
cc4c738e JR |
253 | /* Returns the number of trailing 0-bits in 'n', or 64 if 'n' is 0. */ |
254 | static inline int | |
255 | ctz64(uint64_t n) | |
256 | { | |
d43d314e | 257 | return n ? raw_ctz(n) : 64; |
cc4c738e | 258 | } |
18b9283b | 259 | |
8c947903 JR |
260 | /* Returns the number of leading 0-bits in 'n', or 32 if 'n' is 0. */ |
261 | static inline int | |
262 | clz32(uint32_t n) | |
263 | { | |
264 | return n ? raw_clz64(n) - 32 : 32; | |
265 | } | |
266 | ||
267 | /* Returns the number of leading 0-bits in 'n', or 64 if 'n' is 0. */ | |
268 | static inline int | |
269 | clz64(uint64_t n) | |
270 | { | |
271 | return n ? raw_clz64(n) : 64; | |
272 | } | |
273 | ||
274 | /* Given a word 'n', calculates floor(log_2('n')). This is equivalent | |
275 | * to finding the bit position of the most significant one bit in 'n'. It is | |
276 | * an error to call this function with 'n' == 0. */ | |
277 | static inline int | |
278 | log_2_floor(uint64_t n) | |
279 | { | |
280 | return 63 - raw_clz64(n); | |
281 | } | |
282 | ||
283 | /* Given a word 'n', calculates ceil(log_2('n')). It is an error to | |
284 | * call this function with 'n' == 0. */ | |
285 | static inline int | |
286 | log_2_ceil(uint64_t n) | |
287 | { | |
288 | return log_2_floor(n) + !is_pow2(n); | |
289 | } | |
290 | ||
381657b3 JR |
291 | /* unsigned int count_1bits(uint64_t x): |
292 | * | |
293 | * Returns the number of 1-bits in 'x', between 0 and 64 inclusive. */ | |
294 | #if UINTPTR_MAX == UINT64_MAX | |
295 | static inline unsigned int | |
296 | count_1bits(uint64_t x) | |
297 | { | |
298 | #if __GNUC__ >= 4 && __POPCNT__ | |
299 | return __builtin_popcountll(x); | |
300 | #else | |
301 | /* This portable implementation is the fastest one we know of for 64 | |
302 | * bits, and about 3x faster than GCC 4.7 __builtin_popcountll(). */ | |
303 | const uint64_t h55 = UINT64_C(0x5555555555555555); | |
304 | const uint64_t h33 = UINT64_C(0x3333333333333333); | |
305 | const uint64_t h0F = UINT64_C(0x0F0F0F0F0F0F0F0F); | |
306 | const uint64_t h01 = UINT64_C(0x0101010101010101); | |
307 | x -= (x >> 1) & h55; /* Count of each 2 bits in-place. */ | |
308 | x = (x & h33) + ((x >> 2) & h33); /* Count of each 4 bits in-place. */ | |
309 | x = (x + (x >> 4)) & h0F; /* Count of each 8 bits in-place. */ | |
310 | return (x * h01) >> 56; /* Sum of all bytes. */ | |
311 | #endif | |
312 | } | |
313 | #else /* Not 64-bit. */ | |
314 | #if __GNUC__ >= 4 && __POPCNT__ | |
c3cc4d2d | 315 | static inline unsigned int |
381657b3 | 316 | count_1bits_32__(uint32_t x) |
c3cc4d2d | 317 | { |
c3cc4d2d | 318 | return __builtin_popcount(x); |
381657b3 | 319 | } |
c3cc4d2d | 320 | #else |
381657b3 JR |
321 | #define NEED_COUNT_1BITS_8 1 |
322 | extern const uint8_t count_1bits_8[256]; | |
323 | static inline unsigned int | |
324 | count_1bits_32__(uint32_t x) | |
325 | { | |
c3cc4d2d JR |
326 | /* This portable implementation is the fastest one we know of for 32 bits, |
327 | * and faster than GCC __builtin_popcount(). */ | |
328 | return (count_1bits_8[x & 0xff] + | |
329 | count_1bits_8[(x >> 8) & 0xff] + | |
330 | count_1bits_8[(x >> 16) & 0xff] + | |
331 | count_1bits_8[x >> 24]); | |
c3cc4d2d | 332 | } |
381657b3 | 333 | #endif |
c3cc4d2d JR |
334 | static inline unsigned int |
335 | count_1bits(uint64_t x) | |
336 | { | |
381657b3 | 337 | return count_1bits_32__(x) + count_1bits_32__(x >> 32); |
c3cc4d2d | 338 | } |
381657b3 | 339 | #endif |
8c947903 | 340 | |
fe9d0898 BP |
341 | /* Returns the rightmost 1-bit in 'x' (e.g. 01011000 => 00001000), or 0 if 'x' |
342 | * is 0. */ | |
343 | static inline uintmax_t | |
344 | rightmost_1bit(uintmax_t x) | |
345 | { | |
346 | return x & -x; | |
347 | } | |
348 | ||
349 | /* Returns 'x' with its rightmost 1-bit changed to a zero (e.g. 01011000 => | |
350 | * 01010000), or 0 if 'x' is 0. */ | |
351 | static inline uintmax_t | |
352 | zero_rightmost_1bit(uintmax_t x) | |
353 | { | |
354 | return x & (x - 1); | |
355 | } | |
35bedb61 | 356 | |
4ed47144 BP |
357 | /* Returns the index of the rightmost 1-bit in 'x' (e.g. 01011000 => 3), or an |
358 | * undefined value if 'x' is 0. */ | |
795b3288 | 359 | static inline int |
4ed47144 | 360 | rightmost_1bit_idx(uint64_t x) |
35bedb61 | 361 | { |
4ed47144 | 362 | return ctz64(x); |
35bedb61 BP |
363 | } |
364 | ||
4ed47144 BP |
365 | /* Returns the index of the leftmost 1-bit in 'x' (e.g. 01011000 => 6), or an |
366 | * undefined value if 'x' is 0. */ | |
35bedb61 | 367 | static inline uint32_t |
4ed47144 | 368 | leftmost_1bit_idx(uint64_t x) |
35bedb61 | 369 | { |
4ed47144 | 370 | return log_2_floor(x); |
35bedb61 | 371 | } |
86f35fb5 JR |
372 | |
373 | /* Return a ovs_be32 prefix in network byte order with 'plen' highest bits set. | |
374 | * Shift with 32 is undefined behavior, but we rather use 64-bit shift than | |
375 | * compare. */ | |
376 | static inline ovs_be32 be32_prefix_mask(int plen) | |
377 | { | |
378 | return htonl((uint64_t)UINT32_MAX << (32 - plen)); | |
379 | } | |
fe9d0898 | 380 | \f |
53cb9c3e JR |
381 | bool is_all_zeros(const void *, size_t); |
382 | bool is_all_ones(const void *, size_t); | |
ddc4f8e2 BP |
383 | void bitwise_copy(const void *src, unsigned int src_len, unsigned int src_ofs, |
384 | void *dst, unsigned int dst_len, unsigned int dst_ofs, | |
385 | unsigned int n_bits); | |
6cc7ea5e BP |
386 | void bitwise_zero(void *dst_, unsigned int dst_len, unsigned dst_ofs, |
387 | unsigned int n_bits); | |
c2dd4932 BP |
388 | void bitwise_one(void *dst_, unsigned int dst_len, unsigned dst_ofs, |
389 | unsigned int n_bits); | |
79a010aa BP |
390 | bool bitwise_is_all_zeros(const void *, unsigned int len, unsigned int ofs, |
391 | unsigned int n_bits); | |
099c06e3 BP |
392 | unsigned int bitwise_scan(const void *, unsigned int len, |
393 | bool target, unsigned int start, unsigned int end); | |
95a92d5a BP |
394 | int bitwise_rscan(const void *, unsigned int len, bool target, |
395 | int start, int end); | |
ddc4f8e2 BP |
396 | void bitwise_put(uint64_t value, |
397 | void *dst, unsigned int dst_len, unsigned int dst_ofs, | |
398 | unsigned int n_bits); | |
399 | uint64_t bitwise_get(const void *src, unsigned int src_len, | |
400 | unsigned int src_ofs, unsigned int n_bits); | |
95a92d5a BP |
401 | bool bitwise_get_bit(const void *src, unsigned int len, unsigned int ofs); |
402 | void bitwise_put0(void *dst, unsigned int len, unsigned int ofs); | |
403 | void bitwise_put1(void *dst, unsigned int len, unsigned int ofs); | |
404 | void bitwise_put_bit(void *dst, unsigned int len, unsigned int ofs, bool); | |
405 | void bitwise_toggle_bit(void *dst, unsigned int len, unsigned int ofs); | |
75a75043 | 406 | |
bdd7ecf5 JS |
407 | /* Returns non-zero if the parameters have equal value. */ |
408 | static inline int | |
2ff8484b | 409 | ovs_u128_equals(const ovs_u128 a, const ovs_u128 b) |
bdd7ecf5 | 410 | { |
2ff8484b | 411 | return (a.u64.hi == b.u64.hi) && (a.u64.lo == b.u64.lo); |
bdd7ecf5 JS |
412 | } |
413 | ||
557344e3 JS |
414 | /* Returns true if 'val' is 0. */ |
415 | static inline bool | |
2ff8484b | 416 | ovs_u128_is_zero(const ovs_u128 val) |
557344e3 | 417 | { |
2ff8484b | 418 | return !(val.u64.hi || val.u64.lo); |
557344e3 JS |
419 | } |
420 | ||
421 | /* Returns true if 'val' is all ones. */ | |
422 | static inline bool | |
2ff8484b | 423 | ovs_u128_is_ones(const ovs_u128 val) |
557344e3 | 424 | { |
2ff8484b | 425 | return ovs_u128_equals(val, OVS_U128_MAX); |
557344e3 JS |
426 | } |
427 | ||
428 | /* Returns non-zero if the parameters have equal value. */ | |
429 | static inline int | |
2ff8484b | 430 | ovs_be128_equals(const ovs_be128 a, const ovs_be128 b) |
557344e3 | 431 | { |
2ff8484b | 432 | return (a.be64.hi == b.be64.hi) && (a.be64.lo == b.be64.lo); |
557344e3 JS |
433 | } |
434 | ||
435 | /* Returns true if 'val' is 0. */ | |
436 | static inline bool | |
2ff8484b | 437 | ovs_be128_is_zero(const ovs_be128 val) |
557344e3 | 438 | { |
2ff8484b | 439 | return !(val.be64.hi || val.be64.lo); |
557344e3 JS |
440 | } |
441 | ||
f2d105b5 JS |
442 | static inline ovs_u128 |
443 | ovs_u128_and(const ovs_u128 a, const ovs_u128 b) | |
444 | { | |
445 | ovs_u128 dst; | |
446 | ||
447 | dst.u64.hi = a.u64.hi & b.u64.hi; | |
448 | dst.u64.lo = a.u64.lo & b.u64.lo; | |
449 | ||
450 | return dst; | |
451 | } | |
452 | ||
5fd2f418 | 453 | void xsleep(unsigned int seconds); |
124f09c9 | 454 | |
20174b74 QM |
455 | bool is_stdout_a_tty(void); |
456 | ||
06f14c92 GS |
457 | #ifdef _WIN32 |
458 | \f | |
315ea327 | 459 | char *ovs_format_message(int error); |
06f14c92 | 460 | char *ovs_lasterror_to_string(void); |
daa04db8 | 461 | int ftruncate(int fd, off_t length); |
06f14c92 GS |
462 | #endif |
463 | ||
064af421 BP |
464 | #ifdef __cplusplus |
465 | } | |
466 | #endif | |
467 | ||
468 | #endif /* util.h */ |