defs.h

Go to the documentation of this file.

/*
 * /phoenix/include/defs.h
 *
 * This file is a part of Phoenix operating system.
 * Copyright (c) 2011-2012, Artyom Lebedev <artyom.lebedev@gmail.com>
 * All rights reserved.
 * See COPYING file for copyright details.
 */

#ifndef DEFS_H_
#define DEFS_H_

#define OFFSETOF(type, member)      __builtin_offsetof(type, member)

#define SIZEOF_ARRAY(array)         (sizeof(array) / sizeof((array)[0]))

#define __CONCAT2(x, y)             x##y

#define __CONCAT(x, y)              __CONCAT2(x, y)

#define __STR2(x)                   # x

#define __STR(x)                    __STR2(x)

#define __UID(str)                  __CONCAT(str, __COUNTER__)

#define LIKELY(condition)           __builtin_expect(!!(condition), 1)

#define UNLIKELY(condition)         __builtin_expect(!!(condition), 0)

#define UNUSED                      __attribute__((unused))

#define BIN(x) ((x & 0x1) | ((x & 0x10) ? 0x2 : 0) | \
    ((x & 0x100) ? 0x4 : 0) | ((x & 0x1000) ? 0x8 : 0) | \
    ((x & 0x10000) ? 0x10 : 0) | ((x & 0x100000) ? 0x20 : 0) | \
    ((x & 0x1000000) ? 0x40 : 0) | ((x & 0x10000000) ? 0x80 : 0))

#define NBBY                        8

#ifdef __cplusplus

#define TYPECAST(type, value)           static_cast<type>(value)
#else /* __cplusplus */
#define TYPECAST(type, value)           ((type)value)
#endif /* __cplusplus */

#define TYPE_INT_MIN(type)          (TYPECAST(type, 1) << (sizeof(type) * NBBY - 1))

#define TYPE_INT_MAX(type)          (~TYPE_INT_MIN(type))

#define TYPE_UINT_MAX(type)         (TYPECAST(type, ~0ul))

#define ASMCALL                     extern "C" __attribute__((regparm(0)))

#define ASM                         __asm__ __volatile__

#define ASM_NAME(name)              __asm__(__STR2(name))

/* Shortcuts for various compiler attributes */
#define __PACKED                    __attribute__((packed))
#define __FORMAT(type, fmtIdx, argIdx)  __attribute__ ((format(type, fmtIdx, argIdx)))
#define __NORETURN                  __attribute__ ((noreturn))
#define __NOINLINE                  __attribute__ ((noinline))

#define MIN(x, y)                   ((x) < (y) ? (x) : (y))

#define MAX(x, y)                   ((x) > (y) ? (x) : (y))

#define ROUND_UP(size, align)      (((size) + (align) - 1) / (align) * (align))

#define ROUND_DOWN(size, align)    ((size) / (align) * (align))
#define IS_POWER_OF_2(value)       ((((value) - 1) & (value)) == 0)

#define ROUND_UP2(size, align)     (((size) + (align) - 1) & (~((align) - 1)))

#define ROUND_DOWN2(size, align)   ((size) & (~((align) - 1)))

//XXX should be removed after Eclipse will have 'constexpr' and 'nullptr' keyword recognized.
#ifdef __CDT_PARSER__
#define constexpr
#define nullptr ((void *)0)
#endif /* __CDT_PARSER__ */

#endif /* DEFS_H_ */