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const.h File Reference

Global constants definition. More...

#include <kernel/config.h>
#include <types.h>

Go to the source code of this file.

Defines
#define	TRUE   1
	Logical value of TRUE.
#define	FALSE   0
	Logical value of FALSE.
#define	NULL   0
	NULL constant.
#define	__LITTLE_ENDIAN__   1234
	Little endian architecture.
#define	__BIG_ENDIAN__   4321
	Big endian architecture.
#define	__BYTE_ORDER__   __LITTLE_ENDIAN__
	The current architecture.
#define	MIN(a, b)   ((a) < (b) ? (a) : (b))
	This macro returns the minimum value between a and b.
#define	MAX(a, b)   ((a) > (b) ? (a) : (b))
	This macro returns the maximum value between a and b.
#define	ABS(a)   ((a) < 0 ? -(a) : (a))
	This macro returns the absolute value of a.
#define	TRUNC(addr, align)   ((addr) & ~((align) - 1))
	This macro truncates addr to the align boundary.
#define	ALIGN_DOWN(addr, align)   TRUNC(addr, align)
	This macro rounds down addr to the align boundary.
#define	ALIGN_UP(addr, align)   ( ((addr) + (align) - 1) & (~((align) - 1)) )
	This macro rounds up addr to the align boundary.

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Detailed Description

Global constants definition.

Author:

Andrea Righi <drizzt@inwind.it>

Date:

Last update:
2003-12-16 Andrea Righi: Added pid_t typedef.
2004-13-01 Andrea Righi: New kernel style.

Note:

Copyright (©) 2003 Andrea Righi

Definition in file const.h.

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Define Documentation

#define __BIG_ENDIAN__   4321

Big endian architecture. Definition at line 30 of file const.h.

#define __BYTE_ORDER__   __LITTLE_ENDIAN__

The current architecture. Definition at line 32 of file const.h.

#define __LITTLE_ENDIAN__   1234

Little endian architecture. Definition at line 28 of file const.h.

#define ABS (  a    )     ((a) < 0 ? -(a) : (a))

This macro returns the absolute value of a. Definition at line 41 of file const.h.

#define ALIGN_DOWN (  addr, align    )     TRUNC(addr, align)

This macro rounds down addr to the align boundary. Definition at line 45 of file const.h.

#define ALIGN_UP (  addr, align    )     ( ((addr) + (align) - 1) & (~((align) - 1)) )

This macro rounds up addr to the align boundary. Definition at line 47 of file const.h.

#define FALSE   0

Logical value of FALSE. Definition at line 23 of file const.h.

#define MAX (  a, b    )     ((a) > (b) ? (a) : (b))

This macro returns the maximum value between a and b. Definition at line 39 of file const.h.

#define MIN (  a, b    )     ((a) < (b) ? (a) : (b))

This macro returns the minimum value between a and b. Definition at line 37 of file const.h.

#define NULL   0

NULL constant. Definition at line 25 of file const.h.

#define TRUE   1

Logical value of TRUE. Definition at line 21 of file const.h.

#define TRUNC (  addr, align    )     ((addr) & ~((align) - 1))

This macro truncates addr to the align boundary. Definition at line 43 of file const.h.

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