diff options
| author | Michael Biebl <biebl@debian.org> | 2021-10-01 23:05:04 +0200 |
|---|---|---|
| committer | Michael Biebl <biebl@debian.org> | 2021-10-01 23:05:04 +0200 |
| commit | e74c568b07b50b97873fb4ee1d776dedefbd54d6 (patch) | |
| tree | 3469f17ea9af91f7ff169b890633bda68b0cf76e /shared/systemd/src/basic/macro.h | |
| parent | bfe522304da217296e2a61040f58e35ec5d6f3f2 (diff) | |
New upstream version 1.32.12 upstream/1.32.12
Diffstat (limited to 'shared/systemd/src/basic/macro.h')
| -rw-r--r-- | shared/systemd/src/basic/macro.h | 666 |
1 files changed, 0 insertions, 666 deletions
diff --git a/shared/systemd/src/basic/macro.h b/shared/systemd/src/basic/macro.h deleted file mode 100644 index 34416b3d..00000000 --- a/shared/systemd/src/basic/macro.h +++ /dev/null @@ -1,666 +0,0 @@ -/* SPDX-License-Identifier: LGPL-2.1-or-later */ -#pragma once - -#include <assert.h> -#include <errno.h> -#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 _section_(x) __attribute__((__section__(x))) -#define _used_ __attribute__((__used__)) -#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 _align_(x) __attribute__((__aligned__(x))) -#define _alignas_(x) __attribute__((__aligned__(__alignof(x)))) -#define _alignptr_ __attribute__((__aligned__(sizeof(void*)))) -#define _cleanup_(x) __attribute__((__cleanup__(x))) -#if __GNUC__ >= 7 -#define _fallthrough_ __attribute__((__fallthrough__)) -#else -#define _fallthrough_ -#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 - -#if !defined(HAS_FEATURE_MEMORY_SANITIZER) -# if defined(__has_feature) -# if __has_feature(memory_sanitizer) -# define HAS_FEATURE_MEMORY_SANITIZER 1 -# endif -# endif -# if !defined(HAS_FEATURE_MEMORY_SANITIZER) -# define HAS_FEATURE_MEMORY_SANITIZER 0 -# endif -#endif - -#if !defined(HAS_FEATURE_ADDRESS_SANITIZER) -# ifdef __SANITIZE_ADDRESS__ -# define HAS_FEATURE_ADDRESS_SANITIZER 1 -# elif defined(__has_feature) -# if __has_feature(address_sanitizer) -# define HAS_FEATURE_ADDRESS_SANITIZER 1 -# endif -# endif -# if !defined(HAS_FEATURE_ADDRESS_SANITIZER) -# define HAS_FEATURE_ADDRESS_SANITIZER 0 -# endif -#endif - -/* Note: on GCC "no_sanitize_address" is a function attribute only, on llvm it may also be applied to global - * variables. We define a specific macro which knows this. Note that on GCC we don't need this decorator so much, since - * our primary usecase for this attribute is registration structures placed in named ELF sections which shall not be - * padded, but GCC doesn't pad those anyway if AddressSanitizer is enabled. */ -#if HAS_FEATURE_ADDRESS_SANITIZER && defined(__clang__) -#define _variable_no_sanitize_address_ __attribute__((__no_sanitize_address__)) -#else -#define _variable_no_sanitize_address_ -#endif - -/* Apparently there's no has_feature() call defined to check for ubsan, hence let's define this - * unconditionally on llvm */ -#if defined(__clang__) -#define _function_no_sanitize_float_cast_overflow_ __attribute__((no_sanitize("float-cast-overflow"))) -#else -#define _function_no_sanitize_float_cast_overflow_ -#endif - -#if (defined (__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) || defined (__clang__) -/* Temporarily disable some warnings */ -#define DISABLE_WARNING_DEPRECATED_DECLARATIONS \ - _Pragma("GCC diagnostic push"); \ - _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") - -#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\"") - -#if HAVE_WSTRINGOP_TRUNCATION -# define DISABLE_WARNING_STRINGOP_TRUNCATION \ - _Pragma("GCC diagnostic push"); \ - _Pragma("GCC diagnostic ignored \"-Wstringop-truncation\"") -#else -# define DISABLE_WARNING_STRINGOP_TRUNCATION \ - _Pragma("GCC diagnostic push") -#endif - -#define DISABLE_WARNING_FLOAT_EQUAL \ - _Pragma("GCC diagnostic push"); \ - _Pragma("GCC diagnostic ignored \"-Wfloat-equal\"") - -#define DISABLE_WARNING_TYPE_LIMITS \ - _Pragma("GCC diagnostic push"); \ - _Pragma("GCC diagnostic ignored \"-Wtype-limits\"") - -#define REENABLE_WARNING \ - _Pragma("GCC diagnostic pop") -#else -#define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT -#define DISABLE_WARNING_FORMAT_NONLITERAL -#define DISABLE_WARNING_MISSING_PROTOTYPES -#define DISABLE_WARNING_NONNULL -#define DISABLE_WARNING_SHADOW -#define REENABLE_WARNING -#endif - -/* 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) { - - /* Avoid subtraction overflow */ - if (u == 0) - return 0; - - /* 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)); -} - -static inline size_t GREEDY_ALLOC_ROUND_UP(size_t l) { - size_t m; - - /* Round up allocation sizes a bit to some reasonable, likely larger value. This is supposed to be - * used for cases which are likely called in an allocation loop of some form, i.e. that repetitively - * grow stuff, for example strv_extend() and suchlike. - * - * Note the difference to GREEDY_REALLOC() here, as this helper operates on a single size value only, - * and rounds up to next multiple of 2, needing no further counter. - * - * Note the benefits of direct ALIGN_POWER2() usage: type-safety for size_t, sane handling for very - * small (i.e. <= 2) and safe handling for very large (i.e. > SSIZE_MAX) values. */ - - if (l <= 2) - return 2; /* Never allocate less than 2 of something. */ - - m = ALIGN_POWER2(l); - if (m == 0) /* overflow? */ - return l; - - return m; -} - -#ifndef __COVERITY__ -# define VOID_0 ((void)0) -#else -# define VOID_0 ((void*)0) -#endif - -#define ELEMENTSOF(x) \ - (__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) \ - ({ \ - 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) \ - ({ \ - 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) \ - (__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) \ - ({ \ - const typeof(x) _c = MAX(x, y); \ - MAX(_c, z); \ - }) - -#define MAX4(x, y, z, a) \ - ({ \ - const typeof(x) _d = MAX3(x, y, z); \ - MAX(_d, a); \ - }) - -#undef MIN -#define MIN(a, b) __MIN(UNIQ, (a), UNIQ, (b)) -#define __MIN(aq, a, bq, b) \ - ({ \ - 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_MIN(_A, _B) \ - (__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)) - -#define MIN3(x, y, z) \ - ({ \ - 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) \ - ({ \ - 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; \ - }) - -#define CMP(a, b) __CMP(UNIQ, (a), UNIQ, (b)) -#define __CMP(aq, a, bq, b) \ - ({ \ - const typeof(a) UNIQ_T(A, aq) = (a); \ - const typeof(b) UNIQ_T(B, bq) = (b); \ - UNIQ_T(A, aq) < UNIQ_T(B, bq) ? -1 : \ - UNIQ_T(A, aq) > UNIQ_T(B, bq) ? 1 : 0; \ - }) - -#undef CLAMP -#define CLAMP(x, low, high) __CLAMP(UNIQ, (x), UNIQ, (low), UNIQ, (high)) -#define __CLAMP(xq, x, lowq, low, highq, high) \ - ({ \ - 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) __DIV_ROUND_UP(UNIQ, (x), UNIQ, (y)) -#define __DIV_ROUND_UP(xq, x, yq, y) \ - ({ \ - const typeof(x) UNIQ_T(X, xq) = (x); \ - const typeof(y) UNIQ_T(Y, yq) = (y); \ - (UNIQ_T(X, xq) / UNIQ_T(Y, yq) + !!(UNIQ_T(X, xq) % UNIQ_T(Y, yq))); \ - }) - -#ifdef __COVERITY__ - -/* Use special definitions of assertion macros in order to prevent - * false positives of ASSERT_SIDE_EFFECT on Coverity static analyzer - * for uses of assert_se() and assert_return(). - * - * These definitions make expression go through a (trivial) function - * call to ensure they are not discarded. Also use ! or !! to ensure - * the boolean expressions are seen as such. - * - * This technique has been described and recommended in: - * https://community.synopsys.com/s/question/0D534000046Yuzb/suppressing-assertsideeffect-for-functions-that-allow-for-sideeffects - */ - -extern void __coverity_panic__(void); - -static inline void __coverity_check__(int condition) { - if (!condition) - __coverity_panic__(); -} - -static inline int __coverity_check_and_return__(int condition) { - return condition; -} - -#define assert_message_se(expr, message) __coverity_check__(!!(expr)) - -#define assert_log(expr, message) __coverity_check_and_return__(!!(expr)) - -#else /* ! __COVERITY__ */ - -#define assert_message_se(expr, message) \ - do { \ - if (_unlikely_(!(expr))) \ - log_assert_failed(message, PROJECT_FILE, __LINE__, __PRETTY_FUNCTION__); \ - } while (false) - -#define assert_log(expr, message) ((_likely_(expr)) \ - ? (true) \ - : (log_assert_failed_return(message, PROJECT_FILE, __LINE__, __PRETTY_FUNCTION__), false)) - -#endif /* __COVERITY__ */ - -#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) \ - log_assert_failed_unreachable(t, PROJECT_FILE, __LINE__, __PRETTY_FUNCTION__) - -#if defined(static_assert) -#define assert_cc(expr) \ - static_assert(expr, #expr) -#else -#define assert_cc(expr) \ - struct CONCATENATE(_assert_struct_, __COUNTER__) { \ - char x[(expr) ? 0 : -1]; \ - } -#endif - -#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 return_with_errno(r, err) \ - do { \ - errno = abs(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) ((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_UINT8(p) ((uint8_t) ((uintptr_t) (p))) -#define UINT8_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; - -#define sizeof_field(struct_type, member) sizeof(((struct_type *) 0)->member) - -/* 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) != 0) \ - ans++; \ - ans; \ - }) - -#define UPDATE_FLAG(orig, flag, b) \ - ((b) ? ((orig) | (flag)) : ((orig) & ~(flag))) -#define SET_FLAG(v, flag, b) \ - (v) = UPDATE_FLAG(v, flag, b) -#define FLAGS_SET(v, flags) \ - ((~(v) & (flags)) == 0) - -#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. (We use "long double" as \ - * type for the array, in the hope that checkers such as ubsan don't complain that the initializers for \ - * the array are not representable by the base type. Ideally we'd use typeof(x) as base type, but that \ - * doesn't work, as we want to use this on bitfields and gcc refuses typeof() on bitfields.) */ \ - static const long double __assert_in_set[] _unused_ = { __VA_ARGS__ }; \ - assert_cc(ELEMENTSOF(__assert_in_set) <= 20); \ - 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 STRV_MAKE(...) ((char**) ((const char*[]) { __VA_ARGS__, NULL })) -#define STRV_MAKE_EMPTY ((char*[1]) { NULL }) - -/* Pointers range from NULL to POINTER_MAX */ -#define POINTER_MAX ((void*) UINTPTR_MAX) - -/* Iterates through a specified list of pointers. Accepts NULL pointers, but uses POINTER_MAX as internal marker for EOL. */ -#define FOREACH_POINTER(p, x, ...) \ - for (typeof(p) *_l = (typeof(p)[]) { ({ p = x; }), ##__VA_ARGS__, POINTER_MAX }; \ - p != (typeof(p)) POINTER_MAX; \ - p = *(++_l)) - -/* 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 DEFINE_TRIVIAL_DESTRUCTOR(name, type, func) \ - static inline void name(type *p) { \ - func(p); \ - } - -#define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \ - static inline void func##p(type *p) { \ - if (*p) \ - func(*p); \ - } - -#define _DEFINE_TRIVIAL_REF_FUNC(type, name, scope) \ - scope type *name##_ref(type *p) { \ - if (!p) \ - return NULL; \ - \ - assert(p->n_ref > 0); \ - p->n_ref++; \ - return p; \ - } - -#define _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, scope) \ - scope type *name##_unref(type *p) { \ - if (!p) \ - return NULL; \ - \ - assert(p->n_ref > 0); \ - p->n_ref--; \ - if (p->n_ref > 0) \ - return NULL; \ - \ - return free_func(p); \ - } - -#define DEFINE_TRIVIAL_REF_FUNC(type, name) \ - _DEFINE_TRIVIAL_REF_FUNC(type, name,) -#define DEFINE_PRIVATE_TRIVIAL_REF_FUNC(type, name) \ - _DEFINE_TRIVIAL_REF_FUNC(type, name, static) -#define DEFINE_PUBLIC_TRIVIAL_REF_FUNC(type, name) \ - _DEFINE_TRIVIAL_REF_FUNC(type, name, _public_) - -#define DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func) \ - _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func,) -#define DEFINE_PRIVATE_TRIVIAL_UNREF_FUNC(type, name, free_func) \ - _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, static) -#define DEFINE_PUBLIC_TRIVIAL_UNREF_FUNC(type, name, free_func) \ - _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, _public_) - -#define DEFINE_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \ - DEFINE_TRIVIAL_REF_FUNC(type, name); \ - DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func); - -#define DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \ - DEFINE_PRIVATE_TRIVIAL_REF_FUNC(type, name); \ - DEFINE_PRIVATE_TRIVIAL_UNREF_FUNC(type, name, free_func); - -#define DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \ - DEFINE_PUBLIC_TRIVIAL_REF_FUNC(type, name); \ - DEFINE_PUBLIC_TRIVIAL_UNREF_FUNC(type, name, free_func); - -/* A macro to force copying of a variable from memory. This is useful whenever we want to read something from - * memory and want to make sure the compiler won't optimize away the destination variable for us. It's not - * supposed to be a full CPU memory barrier, i.e. CPU is still allowed to reorder the reads, but it is not - * allowed to remove our local copies of the variables. We want this to work for unaligned memory, hence - * memcpy() is great for our purposes. */ -#define READ_NOW(x) \ - ({ \ - typeof(x) _copy; \ - memcpy(&_copy, &(x), sizeof(_copy)); \ - asm volatile ("" : : : "memory"); \ - _copy; \ - }) - -static inline size_t size_add(size_t x, size_t y) { - return y >= SIZE_MAX - x ? SIZE_MAX : x + y; -} - -#include "log.h" |