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

/*-*- 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_(a,b) __attribute__ ((format (printf, a, b)))
#define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
#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 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 UNIQUE(prefix) CONCATENATE(prefix, __LINE__)

/* 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) (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__ ({                                \
                        const typeof(a) _a = (a);       \
                        const typeof(b) _b = (b);       \
                        _a > _b ? _a : _b;              \
                })

/* 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))

#define MAX3(x,y,z)                                     \
        __extension__ ({                                \
                        const typeof(x) _c = MAX(x,y);  \
                        MAX(_c, z);                     \
                })

#undef MIN
#define MIN(a,b)                                        \
        __extension__ ({                                \
                        const typeof(a) _a = (a);       \
                        const typeof(b) _b = (b);       \
                        _a < _b ? _a : _b;              \
                })

#define MIN3(x,y,z)                                     \
        __extension__ ({                                \
                        const typeof(x) _c = MIN(x,y);  \
                        MIN(_c, z);                     \
                })

#define LESS_BY(A,B)                                    \
        __extension__ ({                                \
                        const typeof(A) _A = (A);       \
                        const typeof(B) _B = (B);       \
                        _A > _B ? _A - _B : 0;          \
                })

#ifndef CLAMP
#define CLAMP(x, low, high)                                             \
        __extension__ ({                                                \
                        const typeof(x) _x = (x);                       \
                        const typeof(low) _low = (low);                 \
                        const 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)
/* 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 UNIQUE(_assert_struct_) {                                \
                char x[(expr) ? 0 : -1];                                \
        };                                                              \
        REENABLE_WARNING
#endif

#define assert_return(expr, r)                                          \
        do {                                                            \
                if (_unlikely_(!(expr))) {                              \
                        log_assert_failed_return(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
                        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 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 architectures, 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_EQUAL(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)                                           \
        (2+(sizeof(type) <= 1 ? 3 :                                     \
            sizeof(type) <= 2 ? 5 :                                     \
            sizeof(type) <= 4 ? 10 :                                    \
            sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))

#define SET_FLAG(v, flag, b) \
        (v) = (b) ? ((v) | (flag)) : ((v) & ~(flag))

#define IN_SET(x, y, ...)                                               \
        ({                                                              \
                const typeof(y) _y = (y);                               \
                const typeof(_y) _x = (x);                              \
                unsigned _i;                                            \
                bool _found = false;                                    \
                for (_i = 0; _i < 1 + sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \
                        if (((const typeof(_x)[]) { _y, __VA_ARGS__ })[_i] == _x) { \
                                _found = true;                          \
                                break;                                  \
                        }                                               \
                _found;                                                 \
        })

/* 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

#include "log.h"
Commit	Line	Data
03467c88	1	/-- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil --/
60918275	2
c2f1db8f	3	#pragma once
60918275	4
a7334b09 LP	5	/***
	6	This file is part of systemd.
	7
	8	Copyright 2010 Lennart Poettering
	9
	10	systemd is free software; you can redistribute it and/or modify it
5430f7f2 LP	11	under the terms of the GNU Lesser General Public License as published by
5430f7f2 LP	12	the Free Software Foundation; either version 2.1 of the License, or
a7334b09 LP	13	(at your option) any later version.
	14
	15	systemd is distributed in the hope that it will be useful, but
	16	WITHOUT ANY WARRANTY; without even the implied warranty of
	17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5430f7f2	18	Lesser General Public License for more details.
a7334b09	19
5430f7f2	20	You should have received a copy of the GNU Lesser General Public License
a7334b09 LP	21	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	22	***/
	23
60918275	24	#include <assert.h>
6a39419f	25	#include <sys/param.h>
60918275	26	#include <sys/types.h>
c31e1495 LP	27	#include <sys/uio.h>
c31e1495 LP	28	#include <inttypes.h>
60918275	29
44b601bc	30	#define _printf_(a,b) __attribute__ ((format (printf, a, b)))
750ef272	31	#define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
93a46b0b	32	#define _sentinel_ __attribute__ ((sentinel))
93a46b0b LP	33	#define _unused_ __attribute__ ((unused))
	34	#define _destructor_ __attribute__ ((destructor))
	35	#define _pure_ __attribute__ ((pure))
	36	#define _const_ __attribute__ ((const))
	37	#define _deprecated_ __attribute__ ((deprecated))
	38	#define _packed_ __attribute__ ((packed))
	39	#define _malloc_ __attribute__ ((malloc))
	40	#define _weak_ __attribute__ ((weak))
	41	#define _likely_(x) (__builtin_expect(!!(x),1))
	42	#define _unlikely_(x) (__builtin_expect(!!(x),0))
40473a70 LP	43	#define _public_ __attribute__ ((visibility("default")))
40473a70 LP	44	#define _hidden_ __attribute__ ((visibility("hidden")))
ad780f19	45	#define _weakref_(x) __attribute__((weakref(#x)))
19d1e4ee	46	#define _alignas_(x) __attribute__((aligned(__alignof(x))))
dfb33a97	47	#define _cleanup_(x) __attribute__((cleanup(x)))
60918275	48
7ebe131a LP	49	/* Temporarily disable some warnings */
	50	#define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT \
	51	_Pragma("GCC diagnostic push"); \
	52	_Pragma("GCC diagnostic ignored \"-Wdeclaration-after-statement\"")
	53
bcfce235 LP	54	#define DISABLE_WARNING_FORMAT_NONLITERAL \
	55	_Pragma("GCC diagnostic push"); \
	56	_Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
	57
f0f2e63b LP	58	#define DISABLE_WARNING_MISSING_PROTOTYPES \
	59	_Pragma("GCC diagnostic push"); \
	60	_Pragma("GCC diagnostic ignored \"-Wmissing-prototypes\"")
	61
8fca4e30 LP	62	#define DISABLE_WARNING_NONNULL \
	63	_Pragma("GCC diagnostic push"); \
	64	_Pragma("GCC diagnostic ignored \"-Wnonnull\"")
	65
d442e2ec DH	66	#define DISABLE_WARNING_SHADOW \
	67	_Pragma("GCC diagnostic push"); \
	68	_Pragma("GCC diagnostic ignored \"-Wshadow\"")
	69
7ebe131a LP	70	#define REENABLE_WARNING \
	71	_Pragma("GCC diagnostic pop")
	72
49e5de64 ZJS	73	/* automake test harness */
	74	#define EXIT_TEST_SKIP 77
	75
bef2733f LP	76	#define XSTRINGIFY(x) #x
	77	#define STRINGIFY(x) XSTRINGIFY(x)
	78
ab9cbe34 LS	79	#define XCONCATENATE(x, y) x ## y
	80	#define CONCATENATE(x, y) XCONCATENATE(x, y)
	81
	82	#define UNIQUE(prefix) CONCATENATE(prefix, __LINE__)
	83
60918275	84	/* Rounds up */
9be9c7cf LP	85
	86	#define ALIGN4(l) (((l) + 3) & ~3)
	87	#define ALIGN8(l) (((l) + 7) & ~7)
	88
	89	#if __SIZEOF_POINTER__ == 8
	90	#define ALIGN(l) ALIGN8(l)
	91	#elif __SIZEOF_POINTER__ == 4
	92	#define ALIGN(l) ALIGN4(l)
	93	#else
	94	#error "Wut? Pointers are neither 4 nor 8 bytes long?"
	95	#endif
	96
49aa47c7 LP	97	#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) p))
49aa47c7 LP	98	#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) p))
e86b80b8 LP	99	#define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p))
e86b80b8 LP	100
37f85e66	101	static inline size_t ALIGN_TO(size_t l, size_t ali) {
37f85e66	102	return ((l + ali - 1) & ~(ali - 1));
22be093f LP	103	}
22be093f LP	104
1c231f56	105	#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) p, ali))
49aa47c7	106
625e870b DH	107	/* align to next higher power-of-2 (except for: 0 => 0, overflow => 0) */
	108	static inline unsigned long ALIGN_POWER2(unsigned long u) {
	109	/* clz(0) is undefined */
	110	if (u == 1)
	111	return 1;
	112
	113	/* left-shift overflow is undefined */
	114	if (__builtin_clzl(u - 1UL) < 1)
	115	return 0;
	116
	117	return 1UL << (sizeof(u) * 8 - __builtin_clzl(u - 1UL));
	118	}
	119
60918275 LP	120	#define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
60918275 LP	121
bbc98d32 KS	122	/*
	123	* container_of - cast a member of a structure out to the containing structure
	124	* @ptr: the pointer to the member.
	125	* @type: the type of the container struct this is embedded in.
	126	* @member: the name of the member within the struct.
	127	*
	128	*/
fa70beaa LP	129	#define container_of(ptr, type, member) \
	130	__extension__ ({ \
	131	const typeof( ((type )0)->member ) __mptr = (ptr); \
	132	(type )( (char )__mptr - offsetof(type,member) ); \
	133	})
bbc98d32	134
9607d947	135	#undef MAX
fdcba430 DH	136	#define MAX(a,b) \
	137	__extension__ ({ \
	138	const typeof(a) _a = (a); \
	139	const typeof(b) _b = (b); \
	140	_a > _b ? _a : _b; \
60918275 LP	141	})
60918275 LP	142
7242d742 DH	143	/* evaluates to (void) if _A or _B are not constant or of different types */
	144	#define CONST_MAX(_A, _B) \
	145	__extension__ (__builtin_choose_expr( \
	146	__builtin_constant_p(_A) && \
	147	__builtin_constant_p(_B) && \
	148	__builtin_types_compatible_p(typeof(_A), typeof(_B)), \
	149	((_A) > (_B)) ? (_A) : (_B), \
	150	(void)0))
	151
fdcba430 DH	152	#define MAX3(x,y,z) \
	153	__extension__ ({ \
	154	const typeof(x) _c = MAX(x,y); \
	155	MAX(_c, z); \
9607d947	156	})
3b63d2d3	157
9607d947	158	#undef MIN
fdcba430 DH	159	#define MIN(a,b) \
	160	__extension__ ({ \
	161	const typeof(a) _a = (a); \
	162	const typeof(b) _b = (b); \
	163	_a < _b ? _a : _b; \
60918275 LP	164	})
60918275 LP	165
fdcba430 DH	166	#define MIN3(x,y,z) \
	167	__extension__ ({ \
	168	const typeof(x) _c = MIN(x,y); \
	169	MIN(_c, z); \
7df23077 DH	170	})
7df23077 DH	171
fdcba430 DH	172	#define LESS_BY(A,B) \
	173	__extension__ ({ \
	174	const typeof(A) _A = (A); \
	175	const typeof(B) _B = (B); \
	176	_A > _B ? _A - _B : 0; \
348ced90 ZJS	177	})
348ced90 ZJS	178
907809fc	179	#ifndef CLAMP
60918275 LP	180	#define CLAMP(x, low, high) \
60918275 LP	181	__extension__ ({ \
fdcba430 DH	182	const typeof(x) _x = (x); \
	183	const typeof(low) _low = (low); \
	184	const typeof(high) _high = (high); \
60918275 LP	185	((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
60918275 LP	186	})
907809fc	187	#endif
60918275	188
dd8f71ee LP	189	#define assert_se(expr) \
dd8f71ee LP	190	do { \
93a46b0b	191	if (_unlikely_(!(expr))) \
b7f33638	192	log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee LP	193	} while (false) \
	194
	195	/* We override the glibc assert() here. */
	196	#undef assert
	197	#ifdef NDEBUG
	198	#define assert(expr) do {} while(false)
	199	#else
	200	#define assert(expr) assert_se(expr)
	201	#endif
60918275	202
dd8f71ee LP	203	#define assert_not_reached(t) \
dd8f71ee LP	204	do { \
b7f33638	205	log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee	206	} while (false)
60918275	207
f791c684	208	#if defined(static_assert)
7ebe131a LP	209	/* static_assert() is sometimes defined in a way that trips up
	210	* -Wdeclaration-after-statement, hence let's temporarily turn off
	211	* this warning around it. */
	212	#define assert_cc(expr) \
	213	DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
	214	static_assert(expr, #expr); \
	215	REENABLE_WARNING
f791c684	216	#else
7ebe131a LP	217	#define assert_cc(expr) \
	218	DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
	219	struct UNIQUE(_assert_struct_) { \
	220	char x[(expr) ? 0 : -1]; \
	221	}; \
	222	REENABLE_WARNING
f791c684	223	#endif
60918275	224
80514f9c LP	225	#define assert_return(expr, r) \
	226	do { \
	227	if (_unlikely_(!(expr))) { \
	228	log_assert_failed_return(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
	229	return (r); \
	230	} \
18387b59 LP	231	} while (false)
18387b59 LP	232
a3dc3547 KS	233	#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
a3dc3547 KS	234	#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
60918275	235	#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
a3dc3547	236	#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	237
a3dc3547 KS	238	#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
a3dc3547 KS	239	#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u)))
c6c18be3	240	#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
a3dc3547	241	#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	242
a3dc3547 KS	243	#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
	244	#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u)))
	245	#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
	246	#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	247
a3dc3547 KS	248	#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p)))
	249	#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u)))
	250	#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p)))
	251	#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	252
74b2466e LP	253	#define PTR_TO_SIZE(p) ((size_t) ((uintptr_t) (p)))
	254	#define SIZE_TO_PTR(u) ((void *) ((uintptr_t) (u)))
	255
476fe607 LP	256	#define memzero(x,l) (memset((x), 0, (l)))
	257	#define zero(x) (memzero(&(x), sizeof(x)))
	258
a9c55a88 LP	259	#define CHAR_TO_STR(x) ((char[2]) { x, 0 })
a9c55a88 LP	260
034c6ed7 LP	261	#define char_array_0(x) x[sizeof(x)-1] = 0;
034c6ed7 LP	262
bff7c062	263	#define IOVEC_SET_STRING(i, s) \
2fa086a8	264	do { \
bff7c062 LP	265	struct iovec *_i = &(i); \
	266	char _s = (char )(s); \
	267	_i->iov_base = _s; \
	268	_i->iov_len = strlen(_s); \
9b3c575e	269	} while(false)
2fa086a8	270
c31e1495 LP	271	static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
	272	unsigned j;
	273	size_t r = 0;
	274
	275	for (j = 0; j < n; j++)
	276	r += i[j].iov_len;
	277
	278	return r;
	279	}
	280
	281	static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
	282	unsigned j;
	283
	284	for (j = 0; j < n; j++) {
	285	size_t sub;
	286
	287	if (_unlikely_(k <= 0))
	288	break;
	289
	290	sub = MIN(i[j].iov_len, k);
	291	i[j].iov_len -= sub;
	292	i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
	293	k -= sub;
	294	}
	295
	296	return k;
	297	}
	298
cecd32f6 LP	299	#define VA_FORMAT_ADVANCE(format, ap) \
	300	do { \
	301	int _argtypes[128]; \
963ddb91 LP	302	size_t _i, _k; \
963ddb91 LP	303	_k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
cecd32f6	304	assert(_k < ELEMENTSOF(_argtypes)); \
963ddb91 LP	305	for (_i = 0; _i < _k; _i++) { \
	306	if (_argtypes[_i] & PA_FLAG_PTR) { \
	307	(void) va_arg(ap, void*); \
	308	continue; \
	309	} \
	310	\
	311	switch (_argtypes[_i]) { \
	312	case PA_INT: \
	313	case PA_INT\|PA_FLAG_SHORT: \
	314	case PA_CHAR: \
	315	(void) va_arg(ap, int); \
	316	break; \
	317	case PA_INT\|PA_FLAG_LONG: \
	318	(void) va_arg(ap, long int); \
	319	break; \
	320	case PA_INT\|PA_FLAG_LONG_LONG: \
	321	(void) va_arg(ap, long long int); \
	322	break; \
	323	case PA_WCHAR: \
	324	(void) va_arg(ap, wchar_t); \
	325	break; \
	326	case PA_WSTRING: \
	327	case PA_STRING: \
	328	case PA_POINTER: \
	329	(void) va_arg(ap, void*); \
	330	break; \
	331	case PA_FLOAT: \
	332	case PA_DOUBLE: \
	333	(void) va_arg(ap, double); \
	334	break; \
	335	case PA_DOUBLE\|PA_FLAG_LONG_DOUBLE: \
	336	(void) va_arg(ap, long double); \
	337	break; \
	338	default: \
	339	assert_not_reached("Unknown format string argument."); \
	340	} \
	341	} \
	342	} while(false)
	343
e5f476db	344	/* Because statfs.t_type can be int on some architectures, we have to cast
bdd29249 HH	345	* the const magic to the type, otherwise the compiler warns about
	346	* signed/unsigned comparison, because the magic can be 32 bit unsigned.
	347	*/
c51cf056	348	#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)
bdd29249	349
fa70beaa LP	350	/* Returns the number of chars needed to format variables of the
	351	* specified type as a decimal string. Adds in extra space for a
	352	* negative '-' prefix. */
fa70beaa	353	#define DECIMAL_STR_MAX(type) \
5bcb0f2b	354	(2+(sizeof(type) <= 1 ? 3 : \
fa70beaa LP	355	sizeof(type) <= 2 ? 5 : \
	356	sizeof(type) <= 4 ? 10 : \
	357	sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
	358
264ad849 LP	359	#define SET_FLAG(v, flag, b) \
	360	(v) = (b) ? ((v) \| (flag)) : ((v) & ~(flag))
	361
dc36d78e	362	#define IN_SET(x, y, ...) \
059d9fbb	363	({ \
dc36d78e LP	364	const typeof(y) _y = (y); \
dc36d78e LP	365	const typeof(_y) _x = (x); \
059d9fbb LP	366	unsigned _i; \
059d9fbb LP	367	bool _found = false; \
dc36d78e LP	368	for (_i = 0; _i < 1 + sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \
dc36d78e LP	369	if (((const typeof(_x)[]) { _y, __VA_ARGS__ })[_i] == _x) { \
059d9fbb LP	370	_found = true; \
	371	break; \
	372	} \
	373	_found; \
cabb7806 LP	374	})
cabb7806 LP	375
919ce0b7 SL	376	/* Define C11 thread_local attribute even on older gcc compiler
919ce0b7 SL	377	* version */
ec202eae SL	378	#ifndef thread_local
	379	/*
	380	* Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__
	381	* see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769
	382	*/
	383	#if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) \|\| (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16))
	384	#define thread_local _Thread_local
	385	#else
	386	#define thread_local __thread
	387	#endif
	388	#endif
cabb7806	389
919ce0b7 SL	390	/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
	391	* compiler versions */
	392	#ifndef noreturn
	393	#if __STDC_VERSION__ >= 201112L
	394	#define noreturn _Noreturn
	395	#else
	396	#define noreturn __attribute__((noreturn))
	397	#endif
	398	#endif
	399
dd8f71ee	400	#include "log.h"