1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
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
13 (at your option) any later version.
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
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/param.h>
26 #include <sys/types.h>
30 #define _printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
31 #define _sentinel_ __attribute__ ((sentinel))
32 #define _noreturn_ __attribute__((noreturn))
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))
43 #define _public_ __attribute__ ((visibility("default")))
44 #define _hidden_ __attribute__ ((visibility("hidden")))
45 #define _weakref_(x) __attribute__((weakref(#x)))
46 #define _introspect_(x) __attribute__((section("introspect." x)))
47 #define _alignas_(x) __attribute__((aligned(__alignof(x))))
48 #define _cleanup_(x) __attribute__((cleanup(x)))
50 /* automake test harness */
51 #define EXIT_TEST_SKIP 77
53 #define XSTRINGIFY(x) #x
54 #define STRINGIFY(x) XSTRINGIFY(x)
58 #define ALIGN4(l) (((l) + 3) & ~3)
59 #define ALIGN8(l) (((l) + 7) & ~7)
61 #if __SIZEOF_POINTER__ == 8
62 #define ALIGN(l) ALIGN8(l)
63 #elif __SIZEOF_POINTER__ == 4
64 #define ALIGN(l) ALIGN4(l)
66 #error "Wut? Pointers are neither 4 nor 8 bytes long?"
69 #define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p))
71 static inline size_t ALIGN_TO(size_t l, size_t ali) {
72 return ((l + ali - 1) & ~(ali - 1));
75 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
78 * container_of - cast a member of a structure out to the containing structure
79 * @ptr: the pointer to the member.
80 * @type: the type of the container struct this is embedded in.
81 * @member: the name of the member within the struct.
84 #define container_of(ptr, type, member) \
86 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
87 (type *)( (char *)__mptr - offsetof(type,member) ); \
100 typeof(x) _c = MAX(x,y); \
107 typeof(a) _a = (a); \
108 typeof(b) _b = (b); \
113 #define CLAMP(x, low, high) \
115 typeof(x) _x = (x); \
116 typeof(low) _low = (low); \
117 typeof(high) _high = (high); \
118 ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
122 #define assert_se(expr) \
124 if (_unlikely_(!(expr))) \
125 log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
128 /* We override the glibc assert() here. */
131 #define assert(expr) do {} while(false)
133 #define assert(expr) assert_se(expr)
136 #define assert_not_reached(t) \
138 log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
141 #if defined(static_assert)
142 #define assert_cc(expr) \
144 static_assert(expr, #expr); \
147 #define assert_cc(expr) \
157 #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
158 #define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))
160 #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
161 #define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))
163 #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
164 #define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u)))
166 #define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
167 #define INT_TO_PTR(u) ((void*) ((intptr_t) (u)))
169 #define TO_INT32(p) ((int32_t) ((intptr_t) (p)))
170 #define INT32_TO_PTR(u) ((void*) ((intptr_t) (u)))
172 #define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
173 #define LONG_TO_PTR(u) ((void*) ((intptr_t) (u)))
175 #define memzero(x,l) (memset((x), 0, (l)))
176 #define zero(x) (memzero(&(x), sizeof(x)))
178 #define CHAR_TO_STR(x) ((char[2]) { x, 0 })
180 #define char_array_0(x) x[sizeof(x)-1] = 0;
182 #define IOVEC_SET_STRING(i, s) \
184 struct iovec *_i = &(i); \
185 char *_s = (char *)(s); \
187 _i->iov_len = strlen(_s); \
190 static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
194 for (j = 0; j < n; j++)
200 static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
203 for (j = 0; j < n; j++) {
206 if (_unlikely_(k <= 0))
209 sub = MIN(i[j].iov_len, k);
211 i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
218 #define VA_FORMAT_ADVANCE(format, ap) \
220 int _argtypes[128]; \
222 _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
223 assert(_k < ELEMENTSOF(_argtypes)); \
224 for (_i = 0; _i < _k; _i++) { \
225 if (_argtypes[_i] & PA_FLAG_PTR) { \
226 (void) va_arg(ap, void*); \
230 switch (_argtypes[_i]) { \
232 case PA_INT|PA_FLAG_SHORT: \
234 (void) va_arg(ap, int); \
236 case PA_INT|PA_FLAG_LONG: \
237 (void) va_arg(ap, long int); \
239 case PA_INT|PA_FLAG_LONG_LONG: \
240 (void) va_arg(ap, long long int); \
243 (void) va_arg(ap, wchar_t); \
248 (void) va_arg(ap, void*); \
252 (void) va_arg(ap, double); \
254 case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: \
255 (void) va_arg(ap, long double); \
258 assert_not_reached("Unknown format string argument."); \
263 /* Returns the number of chars needed to format variables of the
264 * specified type as a decimal string. Adds in extra space for a
265 * negative '-' prefix. */
267 #define DECIMAL_STR_MAX(type) \
268 (1+(sizeof(type) <= 1 ? 3 : \
269 sizeof(type) <= 2 ? 5 : \
270 sizeof(type) <= 4 ? 10 : \
271 sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))