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))))
49 /* automake test harness */
50 #define EXIT_TEST_SKIP 77
52 #define XSTRINGIFY(x) #x
53 #define STRINGIFY(x) XSTRINGIFY(x)
57 #define ALIGN4(l) (((l) + 3) & ~3)
58 #define ALIGN8(l) (((l) + 7) & ~7)
60 #if __SIZEOF_POINTER__ == 8
61 #define ALIGN(l) ALIGN8(l)
62 #elif __SIZEOF_POINTER__ == 4
63 #define ALIGN(l) ALIGN4(l)
65 #error "Wut? Pointers are neither 4 nor 8 bytes long?"
68 #define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p))
70 static inline size_t ALIGN_TO(size_t l, size_t ali) {
71 return ((l + ali - 1) & ~(ali - 1));
74 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
77 * container_of - cast a member of a structure out to the containing structure
78 * @ptr: the pointer to the member.
79 * @type: the type of the container struct this is embedded in.
80 * @member: the name of the member within the struct.
83 #define container_of(ptr, type, member) \
85 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
86 (type *)( (char *)__mptr - offsetof(type,member) ); \
99 typeof(x) _c = MAX(x,y); \
106 typeof(a) _a = (a); \
107 typeof(b) _b = (b); \
112 #define CLAMP(x, low, high) \
114 typeof(x) _x = (x); \
115 typeof(low) _low = (low); \
116 typeof(high) _high = (high); \
117 ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
121 #define assert_se(expr) \
123 if (_unlikely_(!(expr))) \
124 log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
127 /* We override the glibc assert() here. */
130 #define assert(expr) do {} while(false)
132 #define assert(expr) assert_se(expr)
135 #define assert_not_reached(t) \
137 log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
140 #if defined(static_assert)
141 #define assert_cc(expr) \
143 static_assert(expr, #expr); \
146 #define assert_cc(expr) \
156 #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
157 #define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))
159 #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
160 #define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))
162 #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
163 #define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u)))
165 #define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
166 #define INT_TO_PTR(u) ((void*) ((intptr_t) (u)))
168 #define TO_INT32(p) ((int32_t) ((intptr_t) (p)))
169 #define INT32_TO_PTR(u) ((void*) ((intptr_t) (u)))
171 #define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
172 #define LONG_TO_PTR(u) ((void*) ((intptr_t) (u)))
174 #define memzero(x,l) (memset((x), 0, (l)))
175 #define zero(x) (memzero(&(x), sizeof(x)))
177 #define CHAR_TO_STR(x) ((char[2]) { x, 0 })
179 #define char_array_0(x) x[sizeof(x)-1] = 0;
181 #define IOVEC_SET_STRING(i, s) \
183 struct iovec *_i = &(i); \
184 char *_s = (char *)(s); \
186 _i->iov_len = strlen(_s); \
189 static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
193 for (j = 0; j < n; j++)
199 static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
202 for (j = 0; j < n; j++) {
205 if (_unlikely_(k <= 0))
208 sub = MIN(i[j].iov_len, k);
210 i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
217 #define _cleanup_free_ __attribute__((cleanup(freep)))
218 #define _cleanup_fclose_ __attribute__((cleanup(fclosep)))
219 #define _cleanup_pclose_ __attribute__((cleanup(pclosep)))
220 #define _cleanup_close_ __attribute__((cleanup(closep)))
221 #define _cleanup_closedir_ __attribute__((cleanup(closedirp)))
222 #define _cleanup_umask_ __attribute__((cleanup(umaskp)))
223 #define _cleanup_set_free_ __attribute__((cleanup(set_freep)))
224 #define _cleanup_set_free_free_ __attribute__((cleanup(set_free_freep)))
225 #define _cleanup_strv_free_ __attribute__((cleanup(strv_freep)))
226 #define _cleanup_journal_close_ __attribute__((cleanup(journal_closep)))
228 #define VA_FORMAT_ADVANCE(format, ap) \
230 int _argtypes[128]; \
232 _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
233 assert(_k < ELEMENTSOF(_argtypes)); \
234 for (_i = 0; _i < _k; _i++) { \
235 if (_argtypes[_i] & PA_FLAG_PTR) { \
236 (void) va_arg(ap, void*); \
240 switch (_argtypes[_i]) { \
242 case PA_INT|PA_FLAG_SHORT: \
244 (void) va_arg(ap, int); \
246 case PA_INT|PA_FLAG_LONG: \
247 (void) va_arg(ap, long int); \
249 case PA_INT|PA_FLAG_LONG_LONG: \
250 (void) va_arg(ap, long long int); \
253 (void) va_arg(ap, wchar_t); \
258 (void) va_arg(ap, void*); \
262 (void) va_arg(ap, double); \
264 case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: \
265 (void) va_arg(ap, long double); \
268 assert_not_reached("Unknown format string argument."); \
273 /* Returns the number of chars needed to format variables of the
274 * specified type as a decimal string. Adds in extra space for a
275 * negative '-' prefix. */
277 #define DECIMAL_STR_MAX(type) \
278 (1+(sizeof(type) <= 1 ? 3 : \
279 sizeof(type) <= 2 ? 5 : \
280 sizeof(type) <= 4 ? 10 : \
281 sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))