kernel.h

GNU Mach 微内核源代码, 基于美国卡内基美隆大学的 Mach 研究项目

#ifndef _LINUX_KERNEL_H
#define _LINUX_KERNEL_H

/*
 * 'kernel.h' contains some often-used function prototypes etc
 */

#ifdef __KERNEL__

#include <stdarg.h>
#include <linux/linkage.h>

/* Optimization barrier */
#define barrier() __asm__("": : :"memory")

#define INT_MAX		((int)(~0U>>1))
#define UINT_MAX	(~0U)
#define LONG_MAX	((long)(~0UL>>1))
#define ULONG_MAX	(~0UL)

#define STACK_MAGIC	0xdeadbeef

#define	KERN_EMERG	"<0>"	/* system is unusable			*/
#define	KERN_ALERT	"<1>"	/* action must be taken immediately	*/
#define	KERN_CRIT	"<2>"	/* critical conditions			*/
#define	KERN_ERR	"<3>"	/* error conditions			*/
#define	KERN_WARNING	"<4>"	/* warning conditions			*/
#define	KERN_NOTICE	"<5>"	/* normal but significant condition	*/
#define	KERN_INFO	"<6>"	/* informational			*/
#define	KERN_DEBUG	"<7>"	/* debug-level messages			*/

# define NORET_TYPE    /**/
# define ATTRIB_NORET  __attribute__((noreturn))
# define NORET_AND     noreturn,

extern void math_error(void);
NORET_TYPE void panic(const char * fmt, ...)
	__attribute__ ((NORET_AND format (printf, 1, 2)));
NORET_TYPE void do_exit(long error_code)
	ATTRIB_NORET;
extern unsigned long simple_strtoul(const char *,char **,unsigned int);

extern int linux_sprintf(char *buf, const char *fmt, ...);
extern int linux_vsprintf(char *buf, const char *fmt, va_list args);

#ifndef MACH_INCLUDE
#define sprintf		linux_sprintf
#define vsprintf	linux_vsprintf
#endif

extern int session_of_pgrp(int pgrp);

extern int kill_proc(int pid, int sig, int priv);
extern int kill_pg(int pgrp, int sig, int priv);
extern int kill_sl(int sess, int sig, int priv);

asmlinkage int printk(const char * fmt, ...)
	__attribute__ ((format (printf, 1, 2)));

#if DEBUG
#define pr_debug(fmt,arg...) \
	printk(KERN_DEBUG fmt,##arg)
#else
#define pr_debug(fmt,arg...) \
	do { } while (0)
#endif

#define pr_info(fmt,arg...) \
	printk(KERN_INFO fmt,##arg)

/*
 * "suser()" checks against the effective user id, while "fsuser()"
 * is used for file permission checking and checks against the fsuid..
 */
#ifdef MACH
#define fsuser() 1
#else
#define fsuser() (current->fsuid == 0)
#endif

/*
 *      Display an IP address in readable format. 
 */
  
#define NIPQUAD(addr) \
        (((addr) >> 0)  & 0xff), \
        (((addr) >> 8)  & 0xff), \
        (((addr) >> 16) & 0xff), \
        (((addr) >> 24) & 0xff)

#endif /* __KERNEL__ */

#define SI_LOAD_SHIFT	16
struct sysinfo {
	long uptime;			/* Seconds since boot */
	unsigned long loads[3];		/* 1, 5, and 15 minute load averages */
	unsigned long totalram;		/* Total usable main memory size */
	unsigned long freeram;		/* Available memory size */
	unsigned long sharedram;	/* Amount of shared memory */
	unsigned long bufferram;	/* Memory used by buffers */
	unsigned long totalswap;	/* Total swap space size */
	unsigned long freeswap;		/* swap space still available */
	unsigned short procs;		/* Number of current processes */
	char _f[22];			/* Pads structure to 64 bytes */
};

#endif