kernel.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:6k
- #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>
- #include <linux/stddef.h>
- #include <linux/types.h>
- #include <linux/compiler.h>
- #include <asm/byteorder.h>
- /* Optimization barrier */
- /* The "volatile" is due to gcc bugs */
- #define barrier() __asm__ __volatile__("": : :"memory")
- #define INT_MAX ((int)(~0U>>1))
- #define INT_MIN (-INT_MAX - 1)
- #define UINT_MAX (~0U)
- #define LONG_MAX ((long)(~0UL>>1))
- #define LONG_MIN (-LONG_MAX - 1)
- #define ULONG_MAX (~0UL)
- #define STACK_MAGIC 0xdeadbeef
- #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
- #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 */
- extern int console_printk[];
- #define console_loglevel (console_printk[0])
- #define default_message_loglevel (console_printk[1])
- #define minimum_console_loglevel (console_printk[2])
- #define default_console_loglevel (console_printk[3])
- # define NORET_TYPE /**/
- # define ATTRIB_NORET __attribute__((noreturn))
- # define NORET_AND noreturn,
- #ifdef __i386__
- #define FASTCALL(x) x __attribute__((regparm(3)))
- #else
- #define FASTCALL(x) x
- #endif
- struct completion;
- extern struct notifier_block *panic_notifier_list;
- NORET_TYPE void panic(const char * fmt, ...)
- __attribute__ ((NORET_AND format (printf, 1, 2)));
- asmlinkage NORET_TYPE void do_exit(long error_code)
- ATTRIB_NORET;
- NORET_TYPE void complete_and_exit(struct completion *, long)
- ATTRIB_NORET;
- extern int abs(int);
- extern unsigned long simple_strtoul(const char *,char **,unsigned int);
- extern long simple_strtol(const char *,char **,unsigned int);
- extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
- extern long long simple_strtoll(const char *,char **,unsigned int);
- extern int sprintf(char * buf, const char * fmt, ...)
- __attribute__ ((format (printf, 2, 3)));
- extern int vsprintf(char *buf, const char *, va_list);
- extern int snprintf(char * buf, size_t size, const char * fmt, ...)
- __attribute__ ((format (printf, 3, 4)));
- extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
- extern int sscanf(const char *, const char *, ...)
- __attribute__ ((format (scanf,2,3)));
- extern int vsscanf(const char *, const char *, va_list);
- extern int get_option(char **str, int *pint);
- extern char *get_options(char *str, int nints, int *ints);
- extern unsigned long long memparse(char *ptr, char **retptr);
- extern void dev_probe_lock(void);
- extern void dev_probe_unlock(void);
- extern int session_of_pgrp(int pgrp);
- asmlinkage int printk(const char * fmt, ...)
- __attribute__ ((format (printf, 1, 2)));
- static inline void console_silent(void)
- {
- console_loglevel = 0;
- }
- static inline void console_verbose(void)
- {
- if (console_loglevel)
- console_loglevel = 15;
- }
- extern void bust_spinlocks(int yes);
- extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
- extern int tainted;
- extern const char *print_tainted(void);
- extern void dump_stack(void);
- #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)
- /*
- * Display an IP address in readable format.
- */
- #define NIPQUAD(addr)
- ((unsigned char *)&addr)[0],
- ((unsigned char *)&addr)[1],
- ((unsigned char *)&addr)[2],
- ((unsigned char *)&addr)[3]
- #if defined(__LITTLE_ENDIAN)
- #define HIPQUAD(addr)
- ((unsigned char *)&addr)[3],
- ((unsigned char *)&addr)[2],
- ((unsigned char *)&addr)[1],
- ((unsigned char *)&addr)[0]
- #elif defined(__BIG_ENDIAN)
- #define HIPQUAD NIPQUAD
- #else
- #error "Please fix asm/byteorder.h"
- #endif /* __LITTLE_ENDIAN */
- /*
- * min()/max() macros that also do
- * strict type-checking.. See the
- * "unnecessary" pointer comparison.
- */
- #define min(x,y) ({
- const typeof(x) _x = (x);
- const typeof(y) _y = (y);
- (void) (&_x == &_y);
- _x < _y ? _x : _y; })
- #define max(x,y) ({
- const typeof(x) _x = (x);
- const typeof(y) _y = (y);
- (void) (&_x == &_y);
- _x > _y ? _x : _y; })
- /*
- * ..and if you can't take the strict
- * types, you can specify one yourself.
- *
- * Or not use min/max at all, of course.
- */
- #define min_t(type,x,y)
- ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
- #define max_t(type,x,y)
- ({ type __x = (x); type __y = (y); __x > __y ? __x: __y; })
- extern void __out_of_line_bug(int line) ATTRIB_NORET;
- #define out_of_line_bug() __out_of_line_bug(__LINE__)
- #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 */
- unsigned short pad; /* explicit padding for m68k */
- unsigned long totalhigh; /* Total high memory size */
- unsigned long freehigh; /* Available high memory size */
- unsigned int mem_unit; /* Memory unit size in bytes */
- char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
- };
- #define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
- #endif /* _LINUX_KERNEL_H */