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/* thread_info.h: common low-level thread information accessors
 *
 * Copyright (C) 2002  David Howells (dhowells@redhat.com)
 * - Incorporating suggestions made by Linus Torvalds
 */
 
#ifndef _LINUX_THREAD_INFO_H
#define _LINUX_THREAD_INFO_H
 
#include <linux/types.h>
 
/*
 * System call restart block.
 */
struct restart_block {
	long (*fn)(struct restart_block *);
	union {
		struct {
			unsigned long arg0, arg1, arg2, arg3;
		};
		/* For futex_wait */
		struct {
			u32 *uaddr;
			u32 val;
			u32 flags;
			u64 time;
		} futex;
	};
};
 
extern long do_no_restart_syscall(struct restart_block *parm);
 
#include <linux/bitops.h>
#include <asm/thread_info.h>
 
#ifdef __KERNEL__
 
/*
 * flag set/clear/test wrappers
 * - pass TIF_xxxx constants to these functions
 */
 
static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
{
	set_bit(flag,&ti->flags);
}
 
static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
{
	clear_bit(flag,&ti->flags);
}
 
static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
{
	return test_and_set_bit(flag,&ti->flags);
}
 
static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
{
	return test_and_clear_bit(flag,&ti->flags);
}
 
static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
{
	return test_bit(flag,&ti->flags);
}
 
#define set_thread_flag(flag) \
	set_ti_thread_flag(current_thread_info(), flag)
#define clear_thread_flag(flag) \
	clear_ti_thread_flag(current_thread_info(), flag)
#define test_and_set_thread_flag(flag) \
	test_and_set_ti_thread_flag(current_thread_info(), flag)
#define test_and_clear_thread_flag(flag) \
	test_and_clear_ti_thread_flag(current_thread_info(), flag)
#define test_thread_flag(flag) \
	test_ti_thread_flag(current_thread_info(), flag)
 
#define set_need_resched()	set_thread_flag(TIF_NEED_RESCHED)
#define clear_need_resched()	clear_thread_flag(TIF_NEED_RESCHED)
 
#endif
 
#endif /* _LINUX_THREAD_INFO_H */