src/shared/macro.h - systemd-stable - Rivoreo Source Code Repositories

 /*-*- 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_attr_(a,b) __attribute__ ((format (printf, a, b)))
 #define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
 #define _sentinel_ __attribute__ ((sentinel))
 #define _noreturn_ __attribute__((noreturn))
 #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 _introspect_(x) __attribute__((section("introspect." x)))
 #define _alignas_(x) __attribute__((aligned(__alignof(x))))
 #define _cleanup_(x) __attribute__((cleanup(x)))

 /* automake test harness */
 #define EXIT_TEST_SKIP 77

 #define XSTRINGIFY(x) #x
 #define STRINGIFY(x) XSTRINGIFY(x)

 /* 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))

 #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;      \
                 })

 #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)
 #define assert_cc(expr)                         \
         do {                                    \
                 static_assert(expr, #expr);     \
         } while (false)
 #else
 #define assert_cc(expr)                         \
         do {                                    \
                 switch (0) {                    \
                 case 0:                         \
                 case !!(expr):                  \
                         ;                       \
                 }                               \
         } while (false)
 #endif

 #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
 #define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))

 #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
 #define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))

 #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
 #define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u)))

 #define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
 #define INT_TO_PTR(u) ((void*) ((intptr_t) (u)))

 #define TO_INT32(p) ((int32_t) ((intptr_t) (p)))
 #define INT32_TO_PTR(u) ((void*) ((intptr_t) (u)))

 #define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
 #define LONG_TO_PTR(u) ((void*) ((intptr_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 architecures, 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_CMP(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)                                           \
         (1+(sizeof(type) <= 1 ? 3 :                                     \
             sizeof(type) <= 2 ? 5 :                                     \
             sizeof(type) <= 4 ? 10 :                                    \
             sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))

 #include "log.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_attr_(a,b) __attribute__ ((format (printf, a, b)))
	#define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
	#define _sentinel_ __attribute__ ((sentinel))
	#define _noreturn_ __attribute__((noreturn))
	#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 _introspect_(x) __attribute__((section("introspect." x)))
	#define _alignas_(x) __attribute__((aligned(__alignof(x))))
	#define _cleanup_(x) __attribute__((cleanup(x)))

	/* automake test harness */
	#define EXIT_TEST_SKIP 77

	#define XSTRINGIFY(x) #x
	#define STRINGIFY(x) XSTRINGIFY(x)

	/* 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))

	#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; \
	})

	#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)
	#define assert_cc(expr) \
	do { \
	static_assert(expr, #expr); \
	} while (false)
	#else
	#define assert_cc(expr) \
	do { \
	switch (0) { \
	case 0: \
	case !!(expr): \
	; \
	} \
	} while (false)
	#endif

	#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
	#define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))

	#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
	#define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))

	#define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p)))
	#define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u)))

	#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
	#define INT_TO_PTR(u) ((void*) ((intptr_t) (u)))

	#define TO_INT32(p) ((int32_t) ((intptr_t) (p)))
	#define INT32_TO_PTR(u) ((void*) ((intptr_t) (u)))

	#define PTR_TO_LONG(p) ((long) ((intptr_t) (p)))
	#define LONG_TO_PTR(u) ((void*) ((intptr_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 architecures, 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_CMP(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) \
	(1+(sizeof(type) <= 1 ? 3 : \
	sizeof(type) <= 2 ? 5 : \
	sizeof(type) <= 4 ? 10 : \
	sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))

	#include "log.h"