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

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

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

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

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

#ifndef CLAMP
#define CLAMP(x, low, high)                                             \
        __extension__ ({                                                \
                        typeof(x) _x = (x);                             \
                        typeof(low) _low = (low);                       \
                        typeof(high) _high = (high);                    \
                        ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
                })
#endif

#define assert_se(expr)                                                 \
        do {                                                            \
                if (_unlikely_(!(expr)))                                \
                        log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
        } while (false)                                                 \

/* We override the glibc assert() here. */
#undef assert
#ifdef NDEBUG
#define assert(expr) do {} while(false)
#else
#define assert(expr) assert_se(expr)
#endif

#define assert_not_reached(t)                                           \
        do {                                                            \
                log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
        } while (false)

#if defined(static_assert)
/* 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 CR	135	#undef MAX
	136	#define MAX(a,b) \
	137	__extension__ ({ \
	138	typeof(a) _a = (a); \
	139	typeof(b) _b = (b); \
	140	_a > _b ? _a : _b; \
60918275 LP	141	})
60918275 LP	142
9607d947 CR	143	#define MAX3(x,y,z) \
	144	__extension__ ({ \
	145	typeof(x) _c = MAX(x,y); \
	146	MAX(_c, z); \
	147	})
3b63d2d3	148
9607d947	149	#undef MIN
60918275 LP	150	#define MIN(a,b) \
	151	__extension__ ({ \
	152	typeof(a) _a = (a); \
	153	typeof(b) _b = (b); \
	154	_a < _b ? _a : _b; \
	155	})
	156
7df23077 DH	157	#define MIN3(x,y,z) \
	158	__extension__ ({ \
	159	typeof(x) _c = MIN(x,y); \
	160	MIN(_c, z); \
	161	})
	162
348ced90 ZJS	163	#define LESS_BY(A,B) \
	164	__extension__ ({ \
	165	typeof(A) _A = (A); \
	166	typeof(B) _B = (B); \
	167	_A > _B ? _A - _B : 0; \
	168	})
	169
907809fc	170	#ifndef CLAMP
60918275 LP	171	#define CLAMP(x, low, high) \
	172	__extension__ ({ \
	173	typeof(x) _x = (x); \
	174	typeof(low) _low = (low); \
	175	typeof(high) _high = (high); \
	176	((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
	177	})
907809fc	178	#endif
60918275	179
dd8f71ee LP	180	#define assert_se(expr) \
dd8f71ee LP	181	do { \
93a46b0b	182	if (_unlikely_(!(expr))) \
b7f33638	183	log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee LP	184	} while (false) \
	185
	186	/* We override the glibc assert() here. */
	187	#undef assert
	188	#ifdef NDEBUG
	189	#define assert(expr) do {} while(false)
	190	#else
	191	#define assert(expr) assert_se(expr)
	192	#endif
60918275	193
dd8f71ee LP	194	#define assert_not_reached(t) \
dd8f71ee LP	195	do { \
b7f33638	196	log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
dd8f71ee	197	} while (false)
60918275	198
f791c684	199	#if defined(static_assert)
7ebe131a LP	200	/* static_assert() is sometimes defined in a way that trips up
	201	* -Wdeclaration-after-statement, hence let's temporarily turn off
	202	* this warning around it. */
	203	#define assert_cc(expr) \
	204	DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
	205	static_assert(expr, #expr); \
	206	REENABLE_WARNING
f791c684	207	#else
7ebe131a LP	208	#define assert_cc(expr) \
	209	DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \
	210	struct UNIQUE(_assert_struct_) { \
	211	char x[(expr) ? 0 : -1]; \
	212	}; \
	213	REENABLE_WARNING
f791c684	214	#endif
60918275	215
80514f9c LP	216	#define assert_return(expr, r) \
	217	do { \
	218	if (_unlikely_(!(expr))) { \
	219	log_assert_failed_return(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
	220	return (r); \
	221	} \
18387b59 LP	222	} while (false)
18387b59 LP	223
a3dc3547 KS	224	#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
a3dc3547 KS	225	#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
60918275	226	#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
a3dc3547	227	#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	228
a3dc3547 KS	229	#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
a3dc3547 KS	230	#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u)))
c6c18be3	231	#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
a3dc3547	232	#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	233
a3dc3547 KS	234	#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p)))
	235	#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u)))
	236	#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
	237	#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u)))
60918275	238
a3dc3547 KS	239	#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p)))
	240	#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u)))
	241	#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p)))
	242	#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u)))
c6c18be3	243
74b2466e LP	244	#define PTR_TO_SIZE(p) ((size_t) ((uintptr_t) (p)))
	245	#define SIZE_TO_PTR(u) ((void *) ((uintptr_t) (u)))
	246
476fe607 LP	247	#define memzero(x,l) (memset((x), 0, (l)))
	248	#define zero(x) (memzero(&(x), sizeof(x)))
	249
a9c55a88 LP	250	#define CHAR_TO_STR(x) ((char[2]) { x, 0 })
a9c55a88 LP	251
034c6ed7 LP	252	#define char_array_0(x) x[sizeof(x)-1] = 0;
034c6ed7 LP	253
bff7c062	254	#define IOVEC_SET_STRING(i, s) \
2fa086a8	255	do { \
bff7c062 LP	256	struct iovec *_i = &(i); \
	257	char _s = (char )(s); \
	258	_i->iov_base = _s; \
	259	_i->iov_len = strlen(_s); \
9b3c575e	260	} while(false)
2fa086a8	261
c31e1495 LP	262	static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
	263	unsigned j;
	264	size_t r = 0;
	265
	266	for (j = 0; j < n; j++)
	267	r += i[j].iov_len;
	268
	269	return r;
	270	}
	271
	272	static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
	273	unsigned j;
	274
	275	for (j = 0; j < n; j++) {
	276	size_t sub;
	277
	278	if (_unlikely_(k <= 0))
	279	break;
	280
	281	sub = MIN(i[j].iov_len, k);
	282	i[j].iov_len -= sub;
	283	i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
	284	k -= sub;
	285	}
	286
	287	return k;
	288	}
	289
cecd32f6 LP	290	#define VA_FORMAT_ADVANCE(format, ap) \
	291	do { \
	292	int _argtypes[128]; \
963ddb91 LP	293	size_t _i, _k; \
963ddb91 LP	294	_k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
cecd32f6	295	assert(_k < ELEMENTSOF(_argtypes)); \
963ddb91 LP	296	for (_i = 0; _i < _k; _i++) { \
	297	if (_argtypes[_i] & PA_FLAG_PTR) { \
	298	(void) va_arg(ap, void*); \
	299	continue; \
	300	} \
	301	\
	302	switch (_argtypes[_i]) { \
	303	case PA_INT: \
	304	case PA_INT\|PA_FLAG_SHORT: \
	305	case PA_CHAR: \
	306	(void) va_arg(ap, int); \
	307	break; \
	308	case PA_INT\|PA_FLAG_LONG: \
	309	(void) va_arg(ap, long int); \
	310	break; \
	311	case PA_INT\|PA_FLAG_LONG_LONG: \
	312	(void) va_arg(ap, long long int); \
	313	break; \
	314	case PA_WCHAR: \
	315	(void) va_arg(ap, wchar_t); \
	316	break; \
	317	case PA_WSTRING: \
	318	case PA_STRING: \
	319	case PA_POINTER: \
	320	(void) va_arg(ap, void*); \
	321	break; \
	322	case PA_FLOAT: \
	323	case PA_DOUBLE: \
	324	(void) va_arg(ap, double); \
	325	break; \
	326	case PA_DOUBLE\|PA_FLAG_LONG_DOUBLE: \
	327	(void) va_arg(ap, long double); \
	328	break; \
	329	default: \
	330	assert_not_reached("Unknown format string argument."); \
	331	} \
	332	} \
	333	} while(false)
	334
e5f476db	335	/* Because statfs.t_type can be int on some architectures, we have to cast
bdd29249 HH	336	* the const magic to the type, otherwise the compiler warns about
	337	* signed/unsigned comparison, because the magic can be 32 bit unsigned.
	338	*/
c51cf056	339	#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)
bdd29249	340
fa70beaa LP	341	/* Returns the number of chars needed to format variables of the
	342	* specified type as a decimal string. Adds in extra space for a
	343	* negative '-' prefix. */
fa70beaa	344	#define DECIMAL_STR_MAX(type) \
5bcb0f2b	345	(2+(sizeof(type) <= 1 ? 3 : \
fa70beaa LP	346	sizeof(type) <= 2 ? 5 : \
	347	sizeof(type) <= 4 ? 10 : \
	348	sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
	349
264ad849 LP	350	#define SET_FLAG(v, flag, b) \
	351	(v) = (b) ? ((v) \| (flag)) : ((v) & ~(flag))
	352
dc36d78e	353	#define IN_SET(x, y, ...) \
059d9fbb	354	({ \
dc36d78e LP	355	const typeof(y) _y = (y); \
dc36d78e LP	356	const typeof(_y) _x = (x); \
059d9fbb LP	357	unsigned _i; \
059d9fbb LP	358	bool _found = false; \
dc36d78e LP	359	for (_i = 0; _i < 1 + sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \
dc36d78e LP	360	if (((const typeof(_x)[]) { _y, __VA_ARGS__ })[_i] == _x) { \
059d9fbb LP	361	_found = true; \
	362	break; \
	363	} \
	364	_found; \
cabb7806 LP	365	})
cabb7806 LP	366
919ce0b7 SL	367	/* Define C11 thread_local attribute even on older gcc compiler
919ce0b7 SL	368	* version */
ec202eae SL	369	#ifndef thread_local
	370	/*
	371	* Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__
	372	* see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769
	373	*/
	374	#if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) \|\| (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16))
	375	#define thread_local _Thread_local
	376	#else
	377	#define thread_local __thread
	378	#endif
	379	#endif
cabb7806	380
919ce0b7 SL	381	/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
	382	* compiler versions */
	383	#ifndef noreturn
	384	#if __STDC_VERSION__ >= 201112L
	385	#define noreturn _Noreturn
	386	#else
	387	#define noreturn __attribute__((noreturn))
	388	#endif
	389	#endif
	390
dd8f71ee	391	#include "log.h"