1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
7 This file is part of systemd.
9 Copyright 2010 Lennart Poettering
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU Lesser General Public License as published by
13 the Free Software Foundation; either version 2.1 of the License, or
14 (at your option) any later version.
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/param.h>
27 #include <sys/types.h>
31 #define _printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
32 #define _sentinel_ __attribute__ ((sentinel))
33 #define _noreturn_ __attribute__((noreturn))
34 #define _unused_ __attribute__ ((unused))
35 #define _destructor_ __attribute__ ((destructor))
36 #define _pure_ __attribute__ ((pure))
37 #define _const_ __attribute__ ((const))
38 #define _deprecated_ __attribute__ ((deprecated))
39 #define _packed_ __attribute__ ((packed))
40 #define _malloc_ __attribute__ ((malloc))
41 #define _weak_ __attribute__ ((weak))
42 #define _likely_(x) (__builtin_expect(!!(x),1))
43 #define _unlikely_(x) (__builtin_expect(!!(x),0))
44 #define _public_ __attribute__ ((visibility("default")))
45 #define _hidden_ __attribute__ ((visibility("hidden")))
46 #define _weakref_(x) __attribute__((weakref(#x)))
47 #define _introspect_(x) __attribute__((section("introspect." x)))
49 #define XSTRINGIFY(x) #x
50 #define STRINGIFY(x) XSTRINGIFY(x)
53 #define ALIGN(l) ALIGN_TO((l), sizeof(void*))
54 static inline size_t ALIGN_TO(size_t l, size_t ali) {
55 return ((l + ali - 1) & ~(ali - 1));
58 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
84 #define CLAMP(x, low, high) \
87 typeof(low) _low = (low); \
88 typeof(high) _high = (high); \
89 ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
92 #define assert_se(expr) \
94 if (_unlikely_(!(expr))) \
95 log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
98 /* We override the glibc assert() here. */
101 #define assert(expr) do {} while(false)
103 #define assert(expr) assert_se(expr)
106 #define assert_not_reached(t) \
108 log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
111 #define assert_cc(expr) \
120 #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
121 #define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))
123 #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
124 #define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))
126 #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
127 #define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u)))
129 #define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
130 #define INT_TO_PTR(u) ((void*) ((intptr_t) (u)))
132 #define TO_INT32(p) ((int32_t) ((intptr_t) (p)))
133 #define INT32_TO_PTR(u) ((void*) ((intptr_t) (u)))
135 #define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
136 #define LONG_TO_PTR(u) ((void*) ((intptr_t) (u)))
138 #define memzero(x,l) (memset((x), 0, (l)))
139 #define zero(x) (memzero(&(x), sizeof(x)))
141 #define char_array_0(x) x[sizeof(x)-1] = 0;
143 #define IOVEC_SET_STRING(i, s) \
145 struct iovec *_i = &(i); \
146 char *_s = (char *)(s); \
148 _i->iov_len = strlen(_s); \
151 static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
155 for (j = 0; j < n; j++)
161 static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
164 for (j = 0; j < n; j++) {
167 if (_unlikely_(k <= 0))
170 sub = MIN(i[j].iov_len, k);
172 i[j].iov_base = (uint8_t*) i[j].iov_base + sub;