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282 lines
11 KiB
282 lines
11 KiB
#pragma once |
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/*** |
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This file is part of systemd. |
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Copyright 2010 Lennart Poettering |
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systemd is free software; you can redistribute it and/or modify it |
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under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation; either version 2.1 of the License, or |
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(at your option) any later version. |
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systemd is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License |
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along with systemd; If not, see <http://www.gnu.org/licenses/>. |
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***/ |
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#include <assert.h> |
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#include <sys/param.h> |
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#include <sys/types.h> |
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#include <sys/uio.h> |
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#include <inttypes.h> |
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#define _printf_attr_(a,b) __attribute__ ((format (printf, a, b))) |
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#define _sentinel_ __attribute__ ((sentinel)) |
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#define _noreturn_ __attribute__((noreturn)) |
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#define _unused_ __attribute__ ((unused)) |
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#define _destructor_ __attribute__ ((destructor)) |
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#define _pure_ __attribute__ ((pure)) |
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#define _const_ __attribute__ ((const)) |
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#define _deprecated_ __attribute__ ((deprecated)) |
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#define _packed_ __attribute__ ((packed)) |
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#define _malloc_ __attribute__ ((malloc)) |
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#define _weak_ __attribute__ ((weak)) |
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#define _likely_(x) (__builtin_expect(!!(x),1)) |
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#define _unlikely_(x) (__builtin_expect(!!(x),0)) |
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#define _public_ __attribute__ ((visibility("default"))) |
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#define _hidden_ __attribute__ ((visibility("hidden"))) |
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#define _weakref_(x) __attribute__((weakref(#x))) |
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#define _introspect_(x) __attribute__((section("introspect." x))) |
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#define _alignas_(x) __attribute__((aligned(__alignof(x)))) |
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#define _cleanup_(x) __attribute__((cleanup(x))) |
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/* automake test harness */ |
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#define EXIT_TEST_SKIP 77 |
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#define XSTRINGIFY(x) #x |
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#define STRINGIFY(x) XSTRINGIFY(x) |
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/* Rounds up */ |
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#define ALIGN4(l) (((l) + 3) & ~3) |
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#define ALIGN8(l) (((l) + 7) & ~7) |
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#if __SIZEOF_POINTER__ == 8 |
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#define ALIGN(l) ALIGN8(l) |
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#elif __SIZEOF_POINTER__ == 4 |
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#define ALIGN(l) ALIGN4(l) |
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#else |
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#error "Wut? Pointers are neither 4 nor 8 bytes long?" |
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#endif |
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#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) p)) |
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#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) p)) |
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#define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p)) |
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static inline size_t ALIGN_TO(size_t l, size_t ali) { |
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return ((l + ali - 1) & ~(ali - 1)); |
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} |
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#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) p)) |
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#define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0])) |
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/* |
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* container_of - cast a member of a structure out to the containing structure |
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* @ptr: the pointer to the member. |
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* @type: the type of the container struct this is embedded in. |
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* @member: the name of the member within the struct. |
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* |
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*/ |
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#define container_of(ptr, type, member) \ |
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__extension__ ({ \ |
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
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(type *)( (char *)__mptr - offsetof(type,member) ); \ |
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}) |
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#undef MAX |
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#define MAX(a,b) \ |
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__extension__ ({ \ |
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typeof(a) _a = (a); \ |
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typeof(b) _b = (b); \ |
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_a > _b ? _a : _b; \ |
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}) |
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#define MAX3(x,y,z) \ |
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__extension__ ({ \ |
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typeof(x) _c = MAX(x,y); \ |
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MAX(_c, z); \ |
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}) |
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#undef MIN |
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#define MIN(a,b) \ |
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__extension__ ({ \ |
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typeof(a) _a = (a); \ |
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typeof(b) _b = (b); \ |
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_a < _b ? _a : _b; \ |
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}) |
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#ifndef CLAMP |
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#define CLAMP(x, low, high) \ |
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__extension__ ({ \ |
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typeof(x) _x = (x); \ |
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typeof(low) _low = (low); \ |
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typeof(high) _high = (high); \ |
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((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \ |
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}) |
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#endif |
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#define assert_se(expr) \ |
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do { \ |
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if (_unlikely_(!(expr))) \ |
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log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
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} while (false) \ |
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/* We override the glibc assert() here. */ |
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#undef assert |
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#ifdef NDEBUG |
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#define assert(expr) do {} while(false) |
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#else |
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#define assert(expr) assert_se(expr) |
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#endif |
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#define assert_not_reached(t) \ |
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do { \ |
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log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
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} while (false) |
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#if defined(static_assert) |
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#define assert_cc(expr) \ |
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do { \ |
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static_assert(expr, #expr); \ |
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} while (false) |
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#else |
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#define assert_cc(expr) \ |
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do { \ |
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switch (0) { \ |
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case 0: \ |
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case !!(expr): \ |
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; \ |
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} \ |
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} while (false) |
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#endif |
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#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p))) |
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#define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u))) |
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#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p))) |
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#define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u))) |
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#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p))) |
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#define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u))) |
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#define PTR_TO_INT(p) ((int) ((intptr_t) (p))) |
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#define INT_TO_PTR(u) ((void*) ((intptr_t) (u))) |
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#define TO_INT32(p) ((int32_t) ((intptr_t) (p))) |
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#define INT32_TO_PTR(u) ((void*) ((intptr_t) (u))) |
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#define PTR_TO_LONG(p) ((long) ((intptr_t) (p))) |
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#define LONG_TO_PTR(u) ((void*) ((intptr_t) (u))) |
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#define memzero(x,l) (memset((x), 0, (l))) |
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#define zero(x) (memzero(&(x), sizeof(x))) |
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#define CHAR_TO_STR(x) ((char[2]) { x, 0 }) |
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#define char_array_0(x) x[sizeof(x)-1] = 0; |
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#define IOVEC_SET_STRING(i, s) \ |
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do { \ |
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struct iovec *_i = &(i); \ |
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char *_s = (char *)(s); \ |
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_i->iov_base = _s; \ |
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_i->iov_len = strlen(_s); \ |
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} while(false) |
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static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) { |
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unsigned j; |
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size_t r = 0; |
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for (j = 0; j < n; j++) |
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r += i[j].iov_len; |
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return r; |
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} |
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static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) { |
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unsigned j; |
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for (j = 0; j < n; j++) { |
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size_t sub; |
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if (_unlikely_(k == 0)) |
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break; |
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sub = MIN(i[j].iov_len, k); |
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i[j].iov_len -= sub; |
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i[j].iov_base = (uint8_t*) i[j].iov_base + sub; |
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k -= sub; |
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} |
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return k; |
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} |
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#define VA_FORMAT_ADVANCE(format, ap) \ |
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do { \ |
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int _argtypes[128]; \ |
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size_t _i, _k; \ |
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_k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \ |
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assert(_k < ELEMENTSOF(_argtypes)); \ |
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for (_i = 0; _i < _k; _i++) { \ |
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if (_argtypes[_i] & PA_FLAG_PTR) { \ |
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(void) va_arg(ap, void*); \ |
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continue; \ |
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} \ |
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\ |
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switch (_argtypes[_i]) { \ |
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case PA_INT: \ |
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case PA_INT|PA_FLAG_SHORT: \ |
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case PA_CHAR: \ |
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(void) va_arg(ap, int); \ |
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break; \ |
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case PA_INT|PA_FLAG_LONG: \ |
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(void) va_arg(ap, long int); \ |
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break; \ |
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case PA_INT|PA_FLAG_LONG_LONG: \ |
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(void) va_arg(ap, long long int); \ |
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break; \ |
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case PA_WCHAR: \ |
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(void) va_arg(ap, wchar_t); \ |
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break; \ |
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case PA_WSTRING: \ |
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case PA_STRING: \ |
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case PA_POINTER: \ |
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(void) va_arg(ap, void*); \ |
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break; \ |
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case PA_FLOAT: \ |
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case PA_DOUBLE: \ |
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(void) va_arg(ap, double); \ |
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break; \ |
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case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: \ |
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(void) va_arg(ap, long double); \ |
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break; \ |
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default: \ |
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assert_not_reached("Unknown format string argument."); \ |
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} \ |
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} \ |
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} while(false) |
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/* Because statfs.t_type can be int on some architecures, we have to cast |
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* the const magic to the type, otherwise the compiler warns about |
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* signed/unsigned comparison, because the magic can be 32 bit unsigned. |
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*/ |
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#define F_TYPE_CMP(a, b) (a == (typeof(a)) b) |
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/* Returns the number of chars needed to format variables of the |
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* specified type as a decimal string. Adds in extra space for a |
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* negative '-' prefix. */ |
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#define DECIMAL_STR_MAX(type) \ |
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(1+(sizeof(type) <= 1 ? 3 : \ |
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sizeof(type) <= 2 ? 5 : \ |
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sizeof(type) <= 4 ? 10 : \ |
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sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)]))) |
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#include "log.h"
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