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install/macro.h
284 строки
11 KB
Harald Hoyer
dracut-install: make use of _cleanup_* macros
29 апр 2013, 13:35
29 апр 2013, 13:35
3ed08d1
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #pragma once /*** 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 Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser 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 _alignas_(x) __attribute__((aligned(__alignof(x)))) #define _cleanup_(x) __attribute__((cleanup(x))) /* automake test harness */ #define EXIT_TEST_SKIP 77 #define XSTRINGIFY(x) #x #define STRINGIFY(x) XSTRINGIFY(x) /* Rounds up */ #define ALIGN4(l) (((l) + 3) & ~3) #define ALIGN8(l) (((l) + 7) & ~7) #if __SIZEOF_POINTER__ == 8 #define ALIGN(l) ALIGN8(l) #elif __SIZEOF_POINTER__ == 4 #define ALIGN(l) ALIGN4(l) #else #error "Wut? Pointers are neither 4 nor 8 bytes long?" #endif #define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) p)) #define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) p)) #define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p)) static inline size_t ALIGN_TO(size_t l, size_t ali) { return ((l + ali - 1) & ~(ali - 1)); } #define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) p)) #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0])) /* * container_of - cast a member of a structure out to the containing structure * @ptr: the pointer to the member. * @type: the type of the container struct this is embedded in. * @member: the name of the member within the struct. * */ #define container_of(ptr, type, member) \ __extension__ ({ \ const typeof( ((type *)0)->member ) *__mptr = (ptr); \ (type *)( (char *)__mptr - offsetof(type,member) ); \ }) #undef MAX #define MAX(a,b) \ __extension__ ({ \ typeof(a) _a = (a); \ typeof(b) _b = (b); \ _a > _b ? _a : _b; \ }) #define MAX3(x,y,z) \ __extension__ ({ \ typeof(x) _c = MAX(x,y); \ MAX(_c, z); \ }) #undef MIN #define MIN(a,b) \ __extension__ ({ \ typeof(a) _a = (a); \ typeof(b) _b = (b); \ _a < _b ? _a : _b; \ }) #ifndef CLAMP #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)); \ }) #endif #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) #if defined(static_assert) #define assert_cc(expr) \ do { \ static_assert(expr, #expr); \ } while (false) #else #define assert_cc(expr) \ do { \ switch (0) { \ case 0: \ case !!(expr): \ ; \ } \ } while (false) #endif #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_TO_STR(x) ((char[2]) { x, 0 }) #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; } #define VA_FORMAT_ADVANCE(format, ap) \ do { \ int _argtypes[128]; \ size_t _i, _k; \ _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \ assert(_k < ELEMENTSOF(_argtypes)); \ for (_i = 0; _i < _k; _i++) { \ if (_argtypes[_i] & PA_FLAG_PTR) { \ (void) va_arg(ap, void*); \ continue; \ } \ \ switch (_argtypes[_i]) { \ case PA_INT: \ case PA_INT|PA_FLAG_SHORT: \ case PA_CHAR: \ (void) va_arg(ap, int); \ break; \ case PA_INT|PA_FLAG_LONG: \ (void) va_arg(ap, long int); \ break; \ case PA_INT|PA_FLAG_LONG_LONG: \ (void) va_arg(ap, long long int); \ break; \ case PA_WCHAR: \ (void) va_arg(ap, wchar_t); \ break; \ case PA_WSTRING: \ case PA_STRING: \ case PA_POINTER: \ (void) va_arg(ap, void*); \ break; \ case PA_FLOAT: \ case PA_DOUBLE: \ (void) va_arg(ap, double); \ break; \ case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: \ (void) va_arg(ap, long double); \ break; \ default: \ assert_not_reached("Unknown format string argument."); \ } \ } \ } while(false) /* Because statfs.t_type can be int on some architecures, we have to cast * the const magic to the type, otherwise the compiler warns about * signed/unsigned comparison, because the magic can be 32 bit unsigned. */ #define F_TYPE_CMP(a, b) (a == (typeof(a)) b) /* Returns the number of chars needed to format variables of the * specified type as a decimal string. Adds in extra space for a * negative '-' prefix. */ #define DECIMAL_STR_MAX(type) \ (1+(sizeof(type) <= 1 ? 3 : \ sizeof(type) <= 2 ? 5 : \ sizeof(type) <= 4 ? 10 : \ sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)]))) #include "log.h"