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 General Public License as published by
13 the Free Software Foundation; either version 2 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 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/types.h>
30 #define PAGE_SIZE 4096
32 #define _printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
33 #define _sentinel_ __attribute__ ((sentinel))
34 #define _noreturn_ __attribute__((noreturn))
35 #define _unused_ __attribute__ ((unused))
36 #define _destructor_ __attribute__ ((destructor))
37 #define _pure_ __attribute__ ((pure))
38 #define _const_ __attribute__ ((const))
39 #define _deprecated_ __attribute__ ((deprecated))
40 #define _packed_ __attribute__ ((packed))
41 #define _malloc_ __attribute__ ((malloc))
42 #define _weak_ __attribute__ ((weak))
43 #define _likely_(x) (__builtin_expect(!!(x),1))
44 #define _unlikely_(x) (__builtin_expect(!!(x),0))
45 #define _public_ __attribute__ ((visibility("default")))
46 #define _hidden_ __attribute__ ((visibility("hidden")))
47 #define _weakref_(x) __attribute__((weakref(#x)))
48 #define _introspect_(x) __attribute__((section("introspect." x)))
50 #define XSTRINGIFY(x) #x
51 #define STRINGIFY(x) XSTRINGIFY(x)
54 static inline size_t ALIGN(size_t l) {
55 return ((l + sizeof(void*) - 1) & ~(sizeof(void*) - 1));
58 static inline size_t PAGE_ALIGN(size_t l) {
59 return ((l + PAGE_SIZE - 1) & ~(PAGE_SIZE -1));
62 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
88 #define CLAMP(x, low, high) \
91 typeof(low) _low = (low); \
92 typeof(high) _high = (high); \
93 ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
96 #define assert_se(expr) \
98 if (_unlikely_(!(expr))) \
99 log_assert(__FILE__, __LINE__, __PRETTY_FUNCTION__, \
100 "Assertion '%s' failed at %s:%u, function %s(). Aborting.", \
101 #expr , __FILE__, __LINE__, __PRETTY_FUNCTION__); \
104 /* We override the glibc assert() here. */
107 #define assert(expr) do {} while(false)
109 #define assert(expr) assert_se(expr)
112 #define assert_not_reached(t) \
114 log_assert(__FILE__, __LINE__, __PRETTY_FUNCTION__, \
115 "Code should not be reached '%s' at %s:%u, function %s(). Aborting.", \
116 t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
119 #define assert_cc(expr) \
128 #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
129 #define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))
131 #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
132 #define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))
134 #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
135 #define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u)))
137 #define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
138 #define INT_TO_PTR(u) ((void*) ((intptr_t) (u)))
140 #define TO_INT32(p) ((int32_t) ((intptr_t) (p)))
141 #define INT32_TO_PTR(u) ((void*) ((intptr_t) (u)))
143 #define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
144 #define LONG_TO_PTR(u) ((void*) ((intptr_t) (u)))
146 #define memzero(x,l) (memset((x), 0, (l)))
147 #define zero(x) (memzero(&(x), sizeof(x)))
149 #define char_array_0(x) x[sizeof(x)-1] = 0;
151 #define IOVEC_SET_STRING(i, s) \
153 struct iovec *_i = &(i); \
154 char *_s = (char *)(s); \
156 _i->iov_len = strlen(_s); \
159 static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
163 for (j = 0; j < n; j++)
169 static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
172 for (j = 0; j < n; j++) {
175 if (_unlikely_(k <= 0))
178 sub = MIN(i[j].iov_len, k);
180 i[j].iov_base = (uint8_t*) i[j].iov_base + sub;