| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| #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 <inttypes.h> |
| #include <stdbool.h> |
| #include <sys/param.h> |
| #include <sys/sysmacros.h> |
| #include <sys/types.h> |
| |
| #define _printf_(a,b) __attribute__ ((format (printf, a, b))) |
| #ifdef __clang__ |
| # define _alloc_(...) |
| #else |
| # define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__))) |
| #endif |
| #define _sentinel_ __attribute__ ((sentinel)) |
| #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 _alignas_(x) __attribute__((aligned(__alignof(x)))) |
| #define _cleanup_(x) __attribute__((cleanup(x))) |
| #if __GNUC__ >= 7 |
| #define _fallthrough_ __attribute__((fallthrough)) |
| #else |
| #define _fallthrough_ |
| #endif |
| |
| /* Temporarily disable some warnings */ |
| #define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wdeclaration-after-statement\"") |
| |
| #define DISABLE_WARNING_FORMAT_NONLITERAL \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"") |
| |
| #define DISABLE_WARNING_MISSING_PROTOTYPES \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wmissing-prototypes\"") |
| |
| #define DISABLE_WARNING_NONNULL \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wnonnull\"") |
| |
| #define DISABLE_WARNING_SHADOW \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wshadow\"") |
| |
| #define DISABLE_WARNING_INCOMPATIBLE_POINTER_TYPES \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wincompatible-pointer-types\"") |
| |
| #define REENABLE_WARNING \ |
| _Pragma("GCC diagnostic pop") |
| |
| /* automake test harness */ |
| #define EXIT_TEST_SKIP 77 |
| |
| #define XSTRINGIFY(x) #x |
| #define STRINGIFY(x) XSTRINGIFY(x) |
| |
| #define XCONCATENATE(x, y) x ## y |
| #define CONCATENATE(x, y) XCONCATENATE(x, y) |
| |
| #define UNIQ_T(x, uniq) CONCATENATE(__unique_prefix_, CONCATENATE(x, uniq)) |
| #define UNIQ __COUNTER__ |
| |
| /* builtins */ |
| #if __SIZEOF_INT__ == 4 |
| #define BUILTIN_FFS_U32(x) __builtin_ffs(x); |
| #elif __SIZEOF_LONG__ == 4 |
| #define BUILTIN_FFS_U32(x) __builtin_ffsl(x); |
| #else |
| #error "neither int nor long are four bytes long?!?" |
| #endif |
| |
| /* 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), (ali))) |
| |
| /* align to next higher power-of-2 (except for: 0 => 0, overflow => 0) */ |
| static inline unsigned long ALIGN_POWER2(unsigned long u) { |
| /* clz(0) is undefined */ |
| if (u == 1) |
| return 1; |
| |
| /* left-shift overflow is undefined */ |
| if (__builtin_clzl(u - 1UL) < 1) |
| return 0; |
| |
| return 1UL << (sizeof(u) * 8 - __builtin_clzl(u - 1UL)); |
| } |
| |
| #ifndef __COVERITY__ |
| # define VOID_0 ((void)0) |
| #else |
| # define VOID_0 ((void*)0) |
| #endif |
| |
| #define ELEMENTSOF(x) \ |
| __extension__ (__builtin_choose_expr( \ |
| !__builtin_types_compatible_p(typeof(x), typeof(&*(x))), \ |
| sizeof(x)/sizeof((x)[0]), \ |
| VOID_0)) |
| |
| /* |
| * STRLEN - return the length of a string literal, minus the trailing NUL byte. |
| * Contrary to strlen(), this is a constant expression. |
| * @x: a string literal. |
| */ |
| #define STRLEN(x) (sizeof(""x"") - 1) |
| |
| /* |
| * 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) __container_of(UNIQ, (ptr), type, member) |
| #define __container_of(uniq, ptr, type, member) \ |
| __extension__ ({ \ |
| const typeof( ((type*)0)->member ) *UNIQ_T(A, uniq) = (ptr); \ |
| (type*)( (char *)UNIQ_T(A, uniq) - offsetof(type,member) ); \ |
| }) |
| |
| #undef MAX |
| #define MAX(a, b) __MAX(UNIQ, (a), UNIQ, (b)) |
| #define __MAX(aq, a, bq, b) \ |
| __extension__ ({ \ |
| const typeof(a) UNIQ_T(A, aq) = (a); \ |
| const typeof(b) UNIQ_T(B, bq) = (b); \ |
| UNIQ_T(A,aq) > UNIQ_T(B,bq) ? UNIQ_T(A,aq) : UNIQ_T(B,bq); \ |
| }) |
| |
| /* evaluates to (void) if _A or _B are not constant or of different types */ |
| #define CONST_MAX(_A, _B) \ |
| __extension__ (__builtin_choose_expr( \ |
| __builtin_constant_p(_A) && \ |
| __builtin_constant_p(_B) && \ |
| __builtin_types_compatible_p(typeof(_A), typeof(_B)), \ |
| ((_A) > (_B)) ? (_A) : (_B), \ |
| VOID_0)) |
| |
| /* takes two types and returns the size of the larger one */ |
| #define MAXSIZE(A, B) (sizeof(union _packed_ { typeof(A) a; typeof(B) b; })) |
| |
| #define MAX3(x,y,z) \ |
| __extension__ ({ \ |
| const typeof(x) _c = MAX(x,y); \ |
| MAX(_c, z); \ |
| }) |
| |
| #undef MIN |
| #define MIN(a, b) __MIN(UNIQ, (a), UNIQ, (b)) |
| #define __MIN(aq, a, bq, b) \ |
| __extension__ ({ \ |
| const typeof(a) UNIQ_T(A, aq) = (a); \ |
| const typeof(b) UNIQ_T(B, bq) = (b); \ |
| UNIQ_T(A,aq) < UNIQ_T(B,bq) ? UNIQ_T(A,aq) : UNIQ_T(B,bq); \ |
| }) |
| |
| #define MIN3(x,y,z) \ |
| __extension__ ({ \ |
| const typeof(x) _c = MIN(x,y); \ |
| MIN(_c, z); \ |
| }) |
| |
| #define LESS_BY(a, b) __LESS_BY(UNIQ, (a), UNIQ, (b)) |
| #define __LESS_BY(aq, a, bq, b) \ |
| __extension__ ({ \ |
| const typeof(a) UNIQ_T(A, aq) = (a); \ |
| const typeof(b) UNIQ_T(B, bq) = (b); \ |
| UNIQ_T(A,aq) > UNIQ_T(B,bq) ? UNIQ_T(A,aq) - UNIQ_T(B,bq) : 0; \ |
| }) |
| |
| #undef CLAMP |
| #define CLAMP(x, low, high) __CLAMP(UNIQ, (x), UNIQ, (low), UNIQ, (high)) |
| #define __CLAMP(xq, x, lowq, low, highq, high) \ |
| __extension__ ({ \ |
| const typeof(x) UNIQ_T(X,xq) = (x); \ |
| const typeof(low) UNIQ_T(LOW,lowq) = (low); \ |
| const typeof(high) UNIQ_T(HIGH,highq) = (high); \ |
| UNIQ_T(X,xq) > UNIQ_T(HIGH,highq) ? \ |
| UNIQ_T(HIGH,highq) : \ |
| UNIQ_T(X,xq) < UNIQ_T(LOW,lowq) ? \ |
| UNIQ_T(LOW,lowq) : \ |
| UNIQ_T(X,xq); \ |
| }) |
| |
| /* [(x + y - 1) / y] suffers from an integer overflow, even though the |
| * computation should be possible in the given type. Therefore, we use |
| * [x / y + !!(x % y)]. Note that on "Real CPUs" a division returns both the |
| * quotient and the remainder, so both should be equally fast. */ |
| #define DIV_ROUND_UP(_x, _y) \ |
| __extension__ ({ \ |
| const typeof(_x) __x = (_x); \ |
| const typeof(_y) __y = (_y); \ |
| (__x / __y + !!(__x % __y)); \ |
| }) |
| |
| #define assert_message_se(expr, message) \ |
| do { \ |
| if (_unlikely_(!(expr))) \ |
| log_assert_failed(message, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
| } while (false) |
| |
| #define assert_se(expr) assert_message_se(expr, #expr) |
| |
| /* We override the glibc assert() here. */ |
| #undef assert |
| #ifdef NDEBUG |
| #define assert(expr) do {} while (false) |
| #else |
| #define assert(expr) assert_message_se(expr, #expr) |
| #endif |
| |
| #define assert_not_reached(t) \ |
| do { \ |
| log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
| } while (false) |
| |
| #if defined(static_assert) |
| /* static_assert() is sometimes defined in a way that trips up |
| * -Wdeclaration-after-statement, hence let's temporarily turn off |
| * this warning around it. */ |
| #define assert_cc(expr) \ |
| DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \ |
| static_assert(expr, #expr); \ |
| REENABLE_WARNING |
| #else |
| #define assert_cc(expr) \ |
| DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \ |
| struct CONCATENATE(_assert_struct_, __COUNTER__) { \ |
| char x[(expr) ? 0 : -1]; \ |
| }; \ |
| REENABLE_WARNING |
| #endif |
| |
| #define assert_log(expr, message) ((_likely_(expr)) \ |
| ? (true) \ |
| : (log_assert_failed_return(message, __FILE__, __LINE__, __PRETTY_FUNCTION__), false)) |
| |
| #define assert_return(expr, r) \ |
| do { \ |
| if (!assert_log(expr, #expr)) \ |
| return (r); \ |
| } while (false) |
| |
| #define assert_return_errno(expr, r, err) \ |
| do { \ |
| if (!assert_log(expr, #expr)) { \ |
| errno = err; \ |
| return (r); \ |
| } \ |
| } while (false) |
| |
| #define PTR_TO_INT(p) ((int) ((intptr_t) (p))) |
| #define INT_TO_PTR(u) ((void *) ((intptr_t) (u))) |
| #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p))) |
| #define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
| |
| #define PTR_TO_LONG(p) ((long) ((intptr_t) (p))) |
| #define LONG_TO_PTR(u) ((void *) ((intptr_t) (u))) |
| #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p))) |
| #define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
| |
| #define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p))) |
| #define INT32_TO_PTR(u) ((void *) ((intptr_t) (u))) |
| #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p))) |
| #define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
| |
| #define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p))) |
| #define INT64_TO_PTR(u) ((void *) ((intptr_t) (u))) |
| #define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p))) |
| #define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
| |
| #define PTR_TO_SIZE(p) ((size_t) ((uintptr_t) (p))) |
| #define SIZE_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
| |
| #define CHAR_TO_STR(x) ((char[2]) { x, 0 }) |
| |
| #define char_array_0(x) x[sizeof(x)-1] = 0; |
| |
| /* 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 (hence works correctly on signed |
| * types). Includes space for the trailing NUL. */ |
| #define DECIMAL_STR_MAX(type) \ |
| (2+(sizeof(type) <= 1 ? 3 : \ |
| sizeof(type) <= 2 ? 5 : \ |
| sizeof(type) <= 4 ? 10 : \ |
| sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)]))) |
| |
| #define DECIMAL_STR_WIDTH(x) \ |
| ({ \ |
| typeof(x) _x_ = (x); \ |
| unsigned ans = 1; \ |
| while (_x_ /= 10) \ |
| ans++; \ |
| ans; \ |
| }) |
| |
| #define SET_FLAG(v, flag, b) \ |
| (v) = (b) ? ((v) | (flag)) : ((v) & ~(flag)) |
| |
| #define CASE_F(X) case X: |
| #define CASE_F_1(CASE, X) CASE_F(X) |
| #define CASE_F_2(CASE, X, ...) CASE(X) CASE_F_1(CASE, __VA_ARGS__) |
| #define CASE_F_3(CASE, X, ...) CASE(X) CASE_F_2(CASE, __VA_ARGS__) |
| #define CASE_F_4(CASE, X, ...) CASE(X) CASE_F_3(CASE, __VA_ARGS__) |
| #define CASE_F_5(CASE, X, ...) CASE(X) CASE_F_4(CASE, __VA_ARGS__) |
| #define CASE_F_6(CASE, X, ...) CASE(X) CASE_F_5(CASE, __VA_ARGS__) |
| #define CASE_F_7(CASE, X, ...) CASE(X) CASE_F_6(CASE, __VA_ARGS__) |
| #define CASE_F_8(CASE, X, ...) CASE(X) CASE_F_7(CASE, __VA_ARGS__) |
| #define CASE_F_9(CASE, X, ...) CASE(X) CASE_F_8(CASE, __VA_ARGS__) |
| #define CASE_F_10(CASE, X, ...) CASE(X) CASE_F_9(CASE, __VA_ARGS__) |
| #define CASE_F_11(CASE, X, ...) CASE(X) CASE_F_10(CASE, __VA_ARGS__) |
| #define CASE_F_12(CASE, X, ...) CASE(X) CASE_F_11(CASE, __VA_ARGS__) |
| #define CASE_F_13(CASE, X, ...) CASE(X) CASE_F_12(CASE, __VA_ARGS__) |
| #define CASE_F_14(CASE, X, ...) CASE(X) CASE_F_13(CASE, __VA_ARGS__) |
| #define CASE_F_15(CASE, X, ...) CASE(X) CASE_F_14(CASE, __VA_ARGS__) |
| #define CASE_F_16(CASE, X, ...) CASE(X) CASE_F_15(CASE, __VA_ARGS__) |
| #define CASE_F_17(CASE, X, ...) CASE(X) CASE_F_16(CASE, __VA_ARGS__) |
| #define CASE_F_18(CASE, X, ...) CASE(X) CASE_F_17(CASE, __VA_ARGS__) |
| #define CASE_F_19(CASE, X, ...) CASE(X) CASE_F_18(CASE, __VA_ARGS__) |
| #define CASE_F_20(CASE, X, ...) CASE(X) CASE_F_19(CASE, __VA_ARGS__) |
| |
| #define GET_CASE_F(_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,_19,_20,NAME,...) NAME |
| #define FOR_EACH_MAKE_CASE(...) \ |
| GET_CASE_F(__VA_ARGS__,CASE_F_20,CASE_F_19,CASE_F_18,CASE_F_17,CASE_F_16,CASE_F_15,CASE_F_14,CASE_F_13,CASE_F_12,CASE_F_11, \ |
| CASE_F_10,CASE_F_9,CASE_F_8,CASE_F_7,CASE_F_6,CASE_F_5,CASE_F_4,CASE_F_3,CASE_F_2,CASE_F_1) \ |
| (CASE_F,__VA_ARGS__) |
| |
| #define IN_SET(x, ...) \ |
| ({ \ |
| bool _found = false; \ |
| /* If the build breaks in the line below, you need to extend the case macros */ \ |
| static _unused_ char _static_assert__macros_need_to_be_extended[20 - sizeof((int[]){__VA_ARGS__})/sizeof(int)]; \ |
| switch(x) { \ |
| FOR_EACH_MAKE_CASE(__VA_ARGS__) \ |
| _found = true; \ |
| break; \ |
| default: \ |
| break; \ |
| } \ |
| _found; \ |
| }) |
| |
| #define SWAP_TWO(x, y) do { \ |
| typeof(x) _t = (x); \ |
| (x) = (y); \ |
| (y) = (_t); \ |
| } while (false) |
| |
| /* Define C11 thread_local attribute even on older gcc compiler |
| * version */ |
| #ifndef thread_local |
| /* |
| * Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__ |
| * see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769 |
| */ |
| #if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) || (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16)) |
| #define thread_local _Thread_local |
| #else |
| #define thread_local __thread |
| #endif |
| #endif |
| |
| /* Define C11 noreturn without <stdnoreturn.h> and even on older gcc |
| * compiler versions */ |
| #ifndef noreturn |
| #if __STDC_VERSION__ >= 201112L |
| #define noreturn _Noreturn |
| #else |
| #define noreturn __attribute__((noreturn)) |
| #endif |
| #endif |
| |
| #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \ |
| static inline void func##p(type *p) { \ |
| if (*p) \ |
| func(*p); \ |
| } \ |
| struct __useless_struct_to_allow_trailing_semicolon__ |
| |
| #include "log.h" |