[thirdparty/systemd.git] / src / basic / macro.h

#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)))

/* 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));
}

#define ELEMENTSOF(x)                                                    \
        __extension__ (__builtin_choose_expr(                            \
                !__builtin_types_compatible_p(typeof(x), typeof(&*(x))), \
                sizeof(x)/sizeof((x)[0]),                                \
                (void)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) __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"
Commit	Line	Data
c2f1db8f	1	#pragma once
60918275	2
a7334b09 LP	3	/***
	4	This file is part of systemd.
	5
	6	Copyright 2010 Lennart Poettering
	7
	8	systemd is free software; you can redistribute it and/or modify it
5430f7f2 LP	9	under the terms of the GNU Lesser General Public License as published by
5430f7f2 LP	10	the Free Software Foundation; either version 2.1 of the License, or
a7334b09 LP	11	(at your option) any later version.
	12
	13	systemd is distributed in the hope that it will be useful, but
	14	WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5430f7f2	16	Lesser General Public License for more details.
a7334b09	17
5430f7f2	18	You should have received a copy of the GNU Lesser General Public License
a7334b09 LP	19	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	20	***/
	21
c31e1495	22	#include <inttypes.h>
c01ff965	23	#include <stdbool.h>
afc5dbf3	24	#include <sys/param.h>
27d13af7	25	#include <sys/sysmacros.h>
afc5dbf3	26	#include <sys/types.h>
60918275	27
44b601bc	28	#define _printf_(a,b) __attribute__ ((format (printf, a, b)))
26e9e10b ZJS	29	#ifdef __clang__
	30	# define _alloc_(...)
	31	#else
	32	# define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
	33	#endif
93a46b0b	34	#define _sentinel_ __attribute__ ((sentinel))
93a46b0b LP	35	#define _unused_ __attribute__ ((unused))
	36	#define _destructor_ __attribute__ ((destructor))
	37	#define _pure_ __attribute__ ((pure))
	38	#define _const_ __attribute__ ((const))
	39	#define _deprecated_ __attribute__ ((deprecated))
	40	#define _packed_ __attribute__ ((packed))
	41	#define _malloc_ __attribute__ ((malloc))
	42	#define _weak_ __attribute__ ((weak))
	43	#define _likely_(x) (__builtin_expect(!!(x),1))
	44	#define _unlikely_(x) (__builtin_expect(!!(x),0))
40473a70 LP	45	#define _public_ __attribute__ ((visibility("default")))
40473a70 LP	46	#define _hidden_ __attribute__ ((visibility("hidden")))
ad780f19	47	#define _weakref_(x) __attribute__((weakref(#x)))
19d1e4ee	48	#define _alignas_(x) __attribute__((aligned(__alignof(x))))
dfb33a97	49	#define _cleanup_(x) __attribute__((cleanup(x)))
60918275	50
7ebe131a LP	51	/* Temporarily disable some warnings */
	52	#define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT \
	53	_Pragma("GCC diagnostic push"); \
	54	_Pragma("GCC diagnostic ignored \"-Wdeclaration-after-statement\"")
	55
bcfce235 LP	56	#define DISABLE_WARNING_FORMAT_NONLITERAL \
	57	_Pragma("GCC diagnostic push"); \
	58	_Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
	59
f0f2e63b LP	60	#define DISABLE_WARNING_MISSING_PROTOTYPES \
	61	_Pragma("GCC diagnostic push"); \
	62	_Pragma("GCC diagnostic ignored \"-Wmissing-prototypes\"")
	63
8fca4e30 LP	64	#define DISABLE_WARNING_NONNULL \
	65	_Pragma("GCC diagnostic push"); \
	66	_Pragma("GCC diagnostic ignored \"-Wnonnull\"")
	67
d442e2ec DH	68	#define DISABLE_WARNING_SHADOW \
	69	_Pragma("GCC diagnostic push"); \
	70	_Pragma("GCC diagnostic ignored \"-Wshadow\"")
	71
df99a9ef ZJS	72	#define DISABLE_WARNING_INCOMPATIBLE_POINTER_TYPES \
	73	_Pragma("GCC diagnostic push"); \
	74	_Pragma("GCC diagnostic ignored \"-Wincompatible-pointer-types\"")
	75
7ebe131a LP	76	#define REENABLE_WARNING \
	77	_Pragma("GCC diagnostic pop")
	78
49e5de64 ZJS	79	/* automake test harness */
	80	#define EXIT_TEST_SKIP 77
	81
bef2733f LP	82	#define XSTRINGIFY(x) #x
	83	#define STRINGIFY(x) XSTRINGIFY(x)
	84
ab9cbe34 LS	85	#define XCONCATENATE(x, y) x ## y
	86	#define CONCATENATE(x, y) XCONCATENATE(x, y)
	87
fb835651 DH	88	#define UNIQ_T(x, uniq) CONCATENATE(__unique_prefix_, CONCATENATE(x, uniq))
	89	#define UNIQ __COUNTER__
	90
13b498f9 TJ	91	/* builtins */
	92	#if __SIZEOF_INT__ == 4
	93	#define BUILTIN_FFS_U32(x) __builtin_ffs(x);
	94	#elif __SIZEOF_LONG__ == 4
	95	#define BUILTIN_FFS_U32(x) __builtin_ffsl(x);
	96	#else
	97	#error "neither int nor long are four bytes long?!?"
	98	#endif
	99
60918275	100	/* Rounds up */
9be9c7cf LP	101
	102	#define ALIGN4(l) (((l) + 3) & ~3)
	103	#define ALIGN8(l) (((l) + 7) & ~7)
	104
	105	#if __SIZEOF_POINTER__ == 8
	106	#define ALIGN(l) ALIGN8(l)
	107	#elif __SIZEOF_POINTER__ == 4
	108	#define ALIGN(l) ALIGN4(l)
	109	#else
	110	#error "Wut? Pointers are neither 4 nor 8 bytes long?"
	111	#endif
	112
5f86c1f4 LP	113	#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) (p)))
	114	#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) (p)))
	115	#define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) (p)))
e86b80b8	116
37f85e66	117	static inline size_t ALIGN_TO(size_t l, size_t ali) {
37f85e66	118	return ((l + ali - 1) & ~(ali - 1));
22be093f LP	119	}
22be093f LP	120
5f86c1f4	121	#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) (p), (ali)))
49aa47c7	122
625e870b DH	123	/* align to next higher power-of-2 (except for: 0 => 0, overflow => 0) */
	124	static inline unsigned long ALIGN_POWER2(unsigned long u) {
	125	/* clz(0) is undefined */
	126	if (u == 1)
	127	return 1;
	128
	129	/* left-shift overflow is undefined */
	130	if (__builtin_clzl(u - 1UL) < 1)
	131	return 0;
	132
	133	return 1UL << (sizeof(u) * 8 - __builtin_clzl(u - 1UL));
	134	}
	135
7f39a210 MS	136	#define ELEMENTSOF(x) \
	137	__extension__ (__builtin_choose_expr( \
	138	!__builtin_types_compatible_p(typeof(x), typeof(&*(x))), \
	139	sizeof(x)/sizeof((x)[0]), \
	140	(void)0))
bbc98d32 KS	141	/*
	142	* container_of - cast a member of a structure out to the containing structure
	143	* @ptr: the pointer to the member.
	144	* @type: the type of the container struct this is embedded in.
	145	* @member: the name of the member within the struct.
bbc98d32	146	*/
fb835651 DH	147	#define container_of(ptr, type, member) __container_of(UNIQ, (ptr), type, member)
fb835651 DH	148	#define __container_of(uniq, ptr, type, member) \
fa70beaa	149	__extension__ ({ \
fb835651 DH	150	const typeof( ((type)0)->member ) UNIQ_T(A, uniq) = (ptr); \
	151	(type)( (char )UNIQ_T(A, uniq) - offsetof(type,member) ); \
	152	})
bbc98d32	153
9607d947	154	#undef MAX
667a0377 DH	155	#define MAX(a, b) __MAX(UNIQ, (a), UNIQ, (b))
667a0377 DH	156	#define __MAX(aq, a, bq, b) \
fdcba430	157	__extension__ ({ \
667a0377 DH	158	const typeof(a) UNIQ_T(A, aq) = (a); \
	159	const typeof(b) UNIQ_T(B, bq) = (b); \
	160	UNIQ_T(A,aq) > UNIQ_T(B,bq) ? UNIQ_T(A,aq) : UNIQ_T(B,bq); \
	161	})
60918275	162
7242d742 DH	163	/* evaluates to (void) if _A or _B are not constant or of different types */
	164	#define CONST_MAX(_A, _B) \
	165	__extension__ (__builtin_choose_expr( \
	166	__builtin_constant_p(_A) && \
	167	__builtin_constant_p(_B) && \
	168	__builtin_types_compatible_p(typeof(_A), typeof(_B)), \
	169	((_A) > (_B)) ? (_A) : (_B), \
	170	(void)0))
	171
40a1eebd DH	172	/* takes two types and returns the size of the larger one */
	173	#define MAXSIZE(A, B) (sizeof(union _packed_ { typeof(A) a; typeof(B) b; }))
	174
fdcba430 DH	175	#define MAX3(x,y,z) \
	176	__extension__ ({ \
	177	const typeof(x) _c = MAX(x,y); \
	178	MAX(_c, z); \
9607d947	179	})
3b63d2d3	180
9607d947	181	#undef MIN
667a0377 DH	182	#define MIN(a, b) __MIN(UNIQ, (a), UNIQ, (b))
667a0377 DH	183	#define __MIN(aq, a, bq, b) \
fdcba430	184	__extension__ ({ \
667a0377 DH	185	const typeof(a) UNIQ_T(A, aq) = (a); \
	186	const typeof(b) UNIQ_T(B, bq) = (b); \
	187	UNIQ_T(A,aq) < UNIQ_T(B,bq) ? UNIQ_T(A,aq) : UNIQ_T(B,bq); \
	188	})
60918275	189
fdcba430 DH	190	#define MIN3(x,y,z) \
	191	__extension__ ({ \
	192	const typeof(x) _c = MIN(x,y); \
	193	MIN(_c, z); \
7df23077 DH	194	})
7df23077 DH	195
667a0377 DH	196	#define LESS_BY(a, b) __LESS_BY(UNIQ, (a), UNIQ, (b))
667a0377 DH	197	#define __LESS_BY(aq, a, bq, b) \
fdcba430	198	__extension__ ({ \
667a0377 DH	199	const typeof(a) UNIQ_T(A, aq) = (a); \
	200	const typeof(b) UNIQ_T(B, bq) = (b); \
	201	UNIQ_T(A,aq) > UNIQ_T(B,bq) ? UNIQ_T(A,aq) - UNIQ_T(B,bq) : 0; \
	202	})
348ced90	203
667a0377 DH	204	#undef CLAMP
	205	#define CLAMP(x, low, high) __CLAMP(UNIQ, (x), UNIQ, (low), UNIQ, (high))
	206	#define __CLAMP(xq, x, lowq, low, highq, high) \
60918275	207	__extension__ ({ \
667a0377 DH	208	const typeof(x) UNIQ_T(X,xq) = (x); \
	209	const typeof(low) UNIQ_T(LOW,lowq) = (low); \
	210	const typeof(high) UNIQ_T(HIGH,highq) = (high); \
	211	UNIQ_T(X,xq) > UNIQ_T(HIGH,highq) ? \
	212	UNIQ_T(HIGH,highq) : \
	213	UNIQ_T(X,xq) < UNIQ_T(LOW,lowq) ? \
	214	UNIQ_T(LOW,lowq) : \
	215	UNIQ_T(X,xq); \
	216	})
60918275	217
180a60bc DH	218	/* [(x + y - 1) / y] suffers from an integer overflow, even though the
	219	* computation should be possible in the given type. Therefore, we use
	220	* [x / y + !!(x % y)]. Note that on "Real CPUs" a division returns both the
	221	* quotient and the remainder, so both should be equally fast. */
	222	#define DIV_ROUND_UP(_x, _y) \
	223	__extension__ ({ \
	224	const typeof(_x) __x = (_x); \
	225	const typeof(_y) __y = (_y); \
	226	(__x / __y + !!(__x % __y)); \
	227	})
	228
34c38d2a	229	#define assert_message_se(expr, message) \
dd8f71ee	230	do { \
93a46b0b	231	if (_unlikely_(!(expr))) \
34c38d2a MS	232	log_assert_failed(message, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
	233	} while (false)
	234
	235	#define assert_se(expr) assert_message_se(expr, #expr)
dd8f71ee LP	236
	237	/* We override the glibc assert() here. */
	238	#undef assert
	239	#ifdef NDEBUG
9ed794a3	240	#define assert(expr) do {} while (false)
dd8f71ee	241	#else
34c38d2a	242	#define assert(expr) assert_message_se(expr, #expr)
dd8f71ee	243	#endif
60918275	244
dd8f71ee LP	245	#define assert_not_reached(t) \
dd8f71ee LP	246	do { \
b7f33638	247	log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee	248	} while (false)
60918275	249
f791c684	250	#if defined(static_assert)
7ebe131a LP	251	/* static_assert() is sometimes defined in a way that trips up
	252	* -Wdeclaration-after-statement, hence let's temporarily turn off
	253	* this warning around it. */
	254	#define assert_cc(expr) \
	255	DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
	256	static_assert(expr, #expr); \
	257	REENABLE_WARNING
f791c684	258	#else
7ebe131a LP	259	#define assert_cc(expr) \
7ebe131a LP	260	DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
6825a04d	261	struct CONCATENATE(_assert_struct_, __COUNTER__) { \
7ebe131a LP	262	char x[(expr) ? 0 : -1]; \
	263	}; \
	264	REENABLE_WARNING
f791c684	265	#endif
60918275	266
34c38d2a MS	267	#define assert_log(expr, message) ((_likely_(expr)) \
	268	? (true) \
	269	: (log_assert_failed_return(message, __FILE__, __LINE__, __PRETTY_FUNCTION__), false))
366e6411	270
80514f9c LP	271	#define assert_return(expr, r) \
80514f9c LP	272	do { \
34c38d2a	273	if (!assert_log(expr, #expr)) \
80514f9c	274	return (r); \
18387b59 LP	275	} while (false)
18387b59 LP	276
aa029628 TG	277	#define assert_return_errno(expr, r, err) \
aa029628 TG	278	do { \
34c38d2a	279	if (!assert_log(expr, #expr)) { \
aa029628 TG	280	errno = err; \
	281	return (r); \
	282	} \
	283	} while (false)
	284
a3dc3547 KS	285	#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
a3dc3547 KS	286	#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
60918275	287	#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
a3dc3547	288	#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	289
a3dc3547 KS	290	#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
a3dc3547 KS	291	#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u)))
c6c18be3	292	#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
a3dc3547	293	#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	294
a3dc3547 KS	295	#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
	296	#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u)))
	297	#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
	298	#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	299
a3dc3547 KS	300	#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p)))
	301	#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u)))
	302	#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p)))
	303	#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	304
74b2466e LP	305	#define PTR_TO_SIZE(p) ((size_t) ((uintptr_t) (p)))
	306	#define SIZE_TO_PTR(u) ((void *) ((uintptr_t) (u)))
	307
a9c55a88 LP	308	#define CHAR_TO_STR(x) ((char[2]) { x, 0 })
a9c55a88 LP	309
034c6ed7 LP	310	#define char_array_0(x) x[sizeof(x)-1] = 0;
034c6ed7 LP	311
fa70beaa LP	312	/* Returns the number of chars needed to format variables of the
fa70beaa LP	313	* specified type as a decimal string. Adds in extra space for a
b7ce6b59 LP	314	* negative '-' prefix (hence works correctly on signed
b7ce6b59 LP	315	* types). Includes space for the trailing NUL. */
fa70beaa	316	#define DECIMAL_STR_MAX(type) \
5bcb0f2b	317	(2+(sizeof(type) <= 1 ? 3 : \
fa70beaa LP	318	sizeof(type) <= 2 ? 5 : \
	319	sizeof(type) <= 4 ? 10 : \
	320	sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
	321
0d1dbeb3 LP	322	#define DECIMAL_STR_WIDTH(x) \
	323	({ \
	324	typeof(x) _x_ = (x); \
	325	unsigned ans = 1; \
	326	while (_x_ /= 10) \
	327	ans++; \
	328	ans; \
	329	})
	330
264ad849 LP	331	#define SET_FLAG(v, flag, b) \
	332	(v) = (b) ? ((v) \| (flag)) : ((v) & ~(flag))
	333
d5b26d50 DM	334	#define CASE_F(X) case X:
	335	#define CASE_F_1(CASE, X) CASE_F(X)
	336	#define CASE_F_2(CASE, X, ...) CASE(X) CASE_F_1(CASE, __VA_ARGS__)
	337	#define CASE_F_3(CASE, X, ...) CASE(X) CASE_F_2(CASE, __VA_ARGS__)
	338	#define CASE_F_4(CASE, X, ...) CASE(X) CASE_F_3(CASE, __VA_ARGS__)
	339	#define CASE_F_5(CASE, X, ...) CASE(X) CASE_F_4(CASE, __VA_ARGS__)
	340	#define CASE_F_6(CASE, X, ...) CASE(X) CASE_F_5(CASE, __VA_ARGS__)
	341	#define CASE_F_7(CASE, X, ...) CASE(X) CASE_F_6(CASE, __VA_ARGS__)
	342	#define CASE_F_8(CASE, X, ...) CASE(X) CASE_F_7(CASE, __VA_ARGS__)
	343	#define CASE_F_9(CASE, X, ...) CASE(X) CASE_F_8(CASE, __VA_ARGS__)
	344	#define CASE_F_10(CASE, X, ...) CASE(X) CASE_F_9(CASE, __VA_ARGS__)
	345	#define CASE_F_11(CASE, X, ...) CASE(X) CASE_F_10(CASE, __VA_ARGS__)
	346	#define CASE_F_12(CASE, X, ...) CASE(X) CASE_F_11(CASE, __VA_ARGS__)
	347	#define CASE_F_13(CASE, X, ...) CASE(X) CASE_F_12(CASE, __VA_ARGS__)
	348	#define CASE_F_14(CASE, X, ...) CASE(X) CASE_F_13(CASE, __VA_ARGS__)
	349	#define CASE_F_15(CASE, X, ...) CASE(X) CASE_F_14(CASE, __VA_ARGS__)
	350	#define CASE_F_16(CASE, X, ...) CASE(X) CASE_F_15(CASE, __VA_ARGS__)
	351	#define CASE_F_17(CASE, X, ...) CASE(X) CASE_F_16(CASE, __VA_ARGS__)
	352	#define CASE_F_18(CASE, X, ...) CASE(X) CASE_F_17(CASE, __VA_ARGS__)
	353	#define CASE_F_19(CASE, X, ...) CASE(X) CASE_F_18(CASE, __VA_ARGS__)
	354	#define CASE_F_20(CASE, X, ...) CASE(X) CASE_F_19(CASE, __VA_ARGS__)
	355
	356	#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
	357	#define FOR_EACH_MAKE_CASE(...) \
	358	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, \
	359	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) \
	360	(CASE_F,__VA_ARGS__)
	361
	362	#define IN_SET(x, ...) \
	363	({ \
	364	bool _found = false; \
	365	/* If the build breaks in the line below, you need to extend the case macros */ \
	366	static _unused_ char _static_assert__macros_need_to_be_extended[20 - sizeof((int[]){__VA_ARGS__})/sizeof(int)]; \
	367	switch(x) { \
	368	FOR_EACH_MAKE_CASE(__VA_ARGS__) \
	369	_found = true; \
	370	break; \
	371	default: \
	372	break; \
	373	} \
	374	_found; \
cabb7806 LP	375	})
cabb7806 LP	376
35aa04e9 LP	377	#define SWAP_TWO(x, y) do { \
	378	typeof(x) _t = (x); \
	379	(x) = (y); \
	380	(y) = (_t); \
	381	} while (false)
	382
919ce0b7 SL	383	/* Define C11 thread_local attribute even on older gcc compiler
919ce0b7 SL	384	* version */
ec202eae SL	385	#ifndef thread_local
	386	/*
	387	* Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__
	388	* see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769
	389	*/
	390	#if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) \|\| (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16))
	391	#define thread_local _Thread_local
	392	#else
	393	#define thread_local __thread
	394	#endif
	395	#endif
cabb7806	396
919ce0b7 SL	397	/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
	398	* compiler versions */
	399	#ifndef noreturn
	400	#if __STDC_VERSION__ >= 201112L
	401	#define noreturn _Noreturn
	402	#else
	403	#define noreturn __attribute__((noreturn))
	404	#endif
	405	#endif
	406
a2341f68 ZJS	407	#define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
	408	static inline void func##p(type *p) { \
	409	if (*p) \
	410	func(*p); \
	411	} \
	412	struct __useless_struct_to_allow_trailing_semicolon__
	413
dd8f71ee	414	#include "log.h"