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Diffstat (limited to 'src/shared/macro.h')
| -rw-r--r-- | src/shared/macro.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/shared/macro.h b/src/shared/macro.h new file mode 100644 index 0000000000..19f259e4f1 --- /dev/null +++ b/src/shared/macro.h @@ -0,0 +1,181 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +#ifndef foomacrohfoo +#define foomacrohfoo + +/*** + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <assert.h> +#include <sys/param.h> +#include <sys/types.h> +#include <sys/uio.h> +#include <inttypes.h> + +#define _printf_attr_(a,b) __attribute__ ((format (printf, a, b))) +#define _sentinel_ __attribute__ ((sentinel)) +#define _noreturn_ __attribute__((noreturn)) +#define _unused_ __attribute__ ((unused)) +#define _destructor_ __attribute__ ((destructor)) +#define _pure_ __attribute__ ((pure)) +#define _const_ __attribute__ ((const)) +#define _deprecated_ __attribute__ ((deprecated)) +#define _packed_ __attribute__ ((packed)) +#define _malloc_ __attribute__ ((malloc)) +#define _weak_ __attribute__ ((weak)) +#define _likely_(x) (__builtin_expect(!!(x),1)) +#define _unlikely_(x) (__builtin_expect(!!(x),0)) +#define _public_ __attribute__ ((visibility("default"))) +#define _hidden_ __attribute__ ((visibility("hidden"))) +#define _weakref_(x) __attribute__((weakref(#x))) +#define _introspect_(x) __attribute__((section("introspect." x))) + +#define XSTRINGIFY(x) #x +#define STRINGIFY(x) XSTRINGIFY(x) + +/* Rounds up */ +#define ALIGN(l) ALIGN_TO((l), sizeof(void*)) +static inline size_t ALIGN_TO(size_t l, size_t ali) { + return ((l + ali - 1) & ~(ali - 1)); +} + +#define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0])) + +#ifndef MAX +#define MAX(a,b) \ + __extension__ ({ \ + typeof(a) _a = (a); \ + typeof(b) _b = (b); \ + _a > _b ? _a : _b; \ + }) +#endif + +#define MAX3(a,b,c) \ + MAX(MAX(a,b),c) + +#ifndef MIN +#define MIN(a,b) \ + __extension__ ({ \ + typeof(a) _a = (a); \ + typeof(b) _b = (b); \ + _a < _b ? _a : _b; \ + }) +#endif + +#define MIN3(a,b,c) \ + MIN(MIN(a,b),c) + +#define CLAMP(x, low, high) \ + __extension__ ({ \ + typeof(x) _x = (x); \ + typeof(low) _low = (low); \ + typeof(high) _high = (high); \ + ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \ + }) + +#define assert_se(expr) \ + do { \ + if (_unlikely_(!(expr))) \ + log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ + } while (false) \ + +/* We override the glibc assert() here. */ +#undef assert +#ifdef NDEBUG +#define assert(expr) do {} while(false) +#else +#define assert(expr) assert_se(expr) +#endif + +#define assert_not_reached(t) \ + do { \ + log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ + } while (false) + +#define assert_cc(expr) \ + do { \ + switch (0) { \ + case 0: \ + case !!(expr): \ + ; \ + } \ + } while (false) + +#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p))) +#define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u))) + +#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p))) +#define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u))) + +#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p))) +#define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u))) + +#define PTR_TO_INT(p) ((int) ((intptr_t) (p))) +#define INT_TO_PTR(u) ((void*) ((intptr_t) (u))) + +#define TO_INT32(p) ((int32_t) ((intptr_t) (p))) +#define INT32_TO_PTR(u) ((void*) ((intptr_t) (u))) + +#define PTR_TO_LONG(p) ((long) ((intptr_t) (p))) +#define LONG_TO_PTR(u) ((void*) ((intptr_t) (u))) + +#define memzero(x,l) (memset((x), 0, (l))) +#define zero(x) (memzero(&(x), sizeof(x))) + +#define char_array_0(x) x[sizeof(x)-1] = 0; + +#define IOVEC_SET_STRING(i, s) \ + do { \ + struct iovec *_i = &(i); \ + char *_s = (char *)(s); \ + _i->iov_base = _s; \ + _i->iov_len = strlen(_s); \ + } while(false) + +static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) { + unsigned j; + size_t r = 0; + + for (j = 0; j < n; j++) + r += i[j].iov_len; + + return r; +} + +static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) { + unsigned j; + + for (j = 0; j < n; j++) { + size_t sub; + + if (_unlikely_(k <= 0)) + break; + + sub = MIN(i[j].iov_len, k); + i[j].iov_len -= sub; + i[j].iov_base = (uint8_t*) i[j].iov_base + sub; + k -= sub; + } + + return k; +} + +#include "log.h" + +#endif |