itimer.c File Reference

#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/syscalls.h>
#include <linux/time.h>
#include <linux/posix-timers.h>
#include <linux/hrtimer.h>
#include <trace/events/timer.h>
#include <asm/uaccess.h>

Go to the source code of this file.

Macros
#define	timeval_valid(t)   (((t)->tv_sec >= 0) && (((unsigned long) (t)->tv_usec) < USEC_PER_SEC))

Functions
int	do_getitimer (int which, struct itimerval *value)
	SYSCALL_DEFINE2 (getitimer, int, which, struct itimerval __user *, value)
enum hrtimer_restart	it_real_fn (struct hrtimer *timer)
int	do_setitimer (int which, struct itimerval *value, struct itimerval *ovalue)
unsigned int	alarm_setitimer (unsigned int seconds)
	SYSCALL_DEFINE3 (setitimer, int, which, struct itimerval __user *, value, struct itimerval __user *, ovalue)

Macro Definition Documentation

#define timeval_valid

(

t

)

(((t)->tv_sec >= 0) && (((unsigned long) (t)->tv_usec) < USEC_PER_SEC))

Definition at line 187 of file itimer.c.

Function Documentation

unsigned int alarm_setitimer

(

unsigned int

seconds

)

alarm_setitimer - set alarm in seconds

: number of seconds until alarm 0 disables the alarm

Returns the remaining time in seconds of a pending timer or 0 when the timer is not active.

On 32 bit machines the seconds value is limited to (INT_MAX/2) to avoid negative timeval settings which would cause immediate expiry.

Definition at line 253 of file itimer.c.

int do_getitimer	(	int	which,
		struct itimerval *	value
	)

Definition at line 79 of file itimer.c.

int do_setitimer	(	int	which,
		struct itimerval *	value,
		struct itimerval *	ovalue
	)

Definition at line 190 of file itimer.c.

enum hrtimer_restart it_real_fn

(

struct hrtimer *

timer

)

Definition at line 121 of file itimer.c.

SYSCALL_DEFINE2	(	getitimer	,
		int	,
		which	,
		struct itimerval __user *	,
		value
	)

Definition at line 103 of file itimer.c.

SYSCALL_DEFINE3	(	setitimer	,
		int	,
		which	,
		struct itimerval __user *	,
		value	,
		struct itimerval __user *	,
		ovalue
	)

Definition at line 278 of file itimer.c.