259 lines
7.2 KiB
C
259 lines
7.2 KiB
C
#ifndef _LINUX_TIMER_H
|
|
#define _LINUX_TIMER_H
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/ktime.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/debugobjects.h>
|
|
#include <linux/stringify.h>
|
|
|
|
struct tvec_base;
|
|
|
|
struct timer_list {
|
|
struct list_head entry;
|
|
unsigned long expires;
|
|
|
|
void (*function)(unsigned long);
|
|
unsigned long data;
|
|
|
|
struct tvec_base *base;
|
|
#ifdef CONFIG_TIMER_STATS
|
|
void *start_site;
|
|
char start_comm[16];
|
|
int start_pid;
|
|
#endif
|
|
#ifdef CONFIG_LOCKDEP
|
|
struct lockdep_map lockdep_map;
|
|
#endif
|
|
};
|
|
|
|
extern struct tvec_base boot_tvec_bases;
|
|
|
|
#ifdef CONFIG_LOCKDEP
|
|
/*
|
|
* NB: because we have to copy the lockdep_map, setting the lockdep_map key
|
|
* (second argument) here is required, otherwise it could be initialised to
|
|
* the copy of the lockdep_map later! We use the pointer to and the string
|
|
* "<file>:<line>" as the key resp. the name of the lockdep_map.
|
|
*/
|
|
#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn) \
|
|
.lockdep_map = STATIC_LOCKDEP_MAP_INIT(_kn, &_kn),
|
|
#else
|
|
#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)
|
|
#endif
|
|
|
|
#define TIMER_INITIALIZER(_function, _expires, _data) { \
|
|
.entry = { .prev = TIMER_ENTRY_STATIC }, \
|
|
.function = (_function), \
|
|
.expires = (_expires), \
|
|
.data = (_data), \
|
|
.base = &boot_tvec_bases, \
|
|
__TIMER_LOCKDEP_MAP_INITIALIZER( \
|
|
__FILE__ ":" __stringify(__LINE__)) \
|
|
}
|
|
|
|
#define DEFINE_TIMER(_name, _function, _expires, _data) \
|
|
struct timer_list _name = \
|
|
TIMER_INITIALIZER(_function, _expires, _data)
|
|
|
|
void init_timer_key(struct timer_list *timer,
|
|
const char *name,
|
|
struct lock_class_key *key);
|
|
void init_timer_deferrable_key(struct timer_list *timer,
|
|
const char *name,
|
|
struct lock_class_key *key);
|
|
|
|
#ifdef CONFIG_LOCKDEP
|
|
#define init_timer(timer) \
|
|
do { \
|
|
static struct lock_class_key __key; \
|
|
init_timer_key((timer), #timer, &__key); \
|
|
} while (0)
|
|
|
|
#define init_timer_deferrable(timer) \
|
|
do { \
|
|
static struct lock_class_key __key; \
|
|
init_timer_deferrable_key((timer), #timer, &__key); \
|
|
} while (0)
|
|
|
|
#define init_timer_on_stack(timer) \
|
|
do { \
|
|
static struct lock_class_key __key; \
|
|
init_timer_on_stack_key((timer), #timer, &__key); \
|
|
} while (0)
|
|
|
|
#define setup_timer(timer, fn, data) \
|
|
do { \
|
|
static struct lock_class_key __key; \
|
|
setup_timer_key((timer), #timer, &__key, (fn), (data));\
|
|
} while (0)
|
|
|
|
#define setup_timer_on_stack(timer, fn, data) \
|
|
do { \
|
|
static struct lock_class_key __key; \
|
|
setup_timer_on_stack_key((timer), #timer, &__key, \
|
|
(fn), (data)); \
|
|
} while (0)
|
|
#else
|
|
#define init_timer(timer)\
|
|
init_timer_key((timer), NULL, NULL)
|
|
#define init_timer_deferrable(timer)\
|
|
init_timer_deferrable_key((timer), NULL, NULL)
|
|
#define init_timer_on_stack(timer)\
|
|
init_timer_on_stack_key((timer), NULL, NULL)
|
|
#define setup_timer(timer, fn, data)\
|
|
setup_timer_key((timer), NULL, NULL, (fn), (data))
|
|
#define setup_timer_on_stack(timer, fn, data)\
|
|
setup_timer_on_stack_key((timer), NULL, NULL, (fn), (data))
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_OBJECTS_TIMERS
|
|
extern void init_timer_on_stack_key(struct timer_list *timer,
|
|
const char *name,
|
|
struct lock_class_key *key);
|
|
extern void destroy_timer_on_stack(struct timer_list *timer);
|
|
#else
|
|
static inline void destroy_timer_on_stack(struct timer_list *timer) { }
|
|
static inline void init_timer_on_stack_key(struct timer_list *timer,
|
|
const char *name,
|
|
struct lock_class_key *key)
|
|
{
|
|
init_timer_key(timer, name, key);
|
|
}
|
|
#endif
|
|
|
|
static inline void setup_timer_key(struct timer_list * timer,
|
|
const char *name,
|
|
struct lock_class_key *key,
|
|
void (*function)(unsigned long),
|
|
unsigned long data)
|
|
{
|
|
timer->function = function;
|
|
timer->data = data;
|
|
init_timer_key(timer, name, key);
|
|
}
|
|
|
|
static inline void setup_timer_on_stack_key(struct timer_list *timer,
|
|
const char *name,
|
|
struct lock_class_key *key,
|
|
void (*function)(unsigned long),
|
|
unsigned long data)
|
|
{
|
|
timer->function = function;
|
|
timer->data = data;
|
|
init_timer_on_stack_key(timer, name, key);
|
|
}
|
|
|
|
/**
|
|
* timer_pending - is a timer pending?
|
|
* @timer: the timer in question
|
|
*
|
|
* timer_pending will tell whether a given timer is currently pending,
|
|
* or not. Callers must ensure serialization wrt. other operations done
|
|
* to this timer, eg. interrupt contexts, or other CPUs on SMP.
|
|
*
|
|
* return value: 1 if the timer is pending, 0 if not.
|
|
*/
|
|
static inline int timer_pending(const struct timer_list * timer)
|
|
{
|
|
return timer->entry.next != NULL;
|
|
}
|
|
|
|
extern void add_timer_on(struct timer_list *timer, int cpu);
|
|
extern int del_timer(struct timer_list * timer);
|
|
extern int mod_timer(struct timer_list *timer, unsigned long expires);
|
|
extern int mod_timer_pending(struct timer_list *timer, unsigned long expires);
|
|
extern int mod_timer_pinned(struct timer_list *timer, unsigned long expires);
|
|
|
|
#define TIMER_NOT_PINNED 0
|
|
#define TIMER_PINNED 1
|
|
/*
|
|
* The jiffies value which is added to now, when there is no timer
|
|
* in the timer wheel:
|
|
*/
|
|
#define NEXT_TIMER_MAX_DELTA ((1UL << 30) - 1)
|
|
|
|
/*
|
|
* Return when the next timer-wheel timeout occurs (in absolute jiffies),
|
|
* locks the timer base:
|
|
*/
|
|
extern unsigned long next_timer_interrupt(void);
|
|
/*
|
|
* Return when the next timer-wheel timeout occurs (in absolute jiffies),
|
|
* locks the timer base and does the comparison against the given
|
|
* jiffie.
|
|
*/
|
|
extern unsigned long get_next_timer_interrupt(unsigned long now);
|
|
|
|
/*
|
|
* Timer-statistics info:
|
|
*/
|
|
#ifdef CONFIG_TIMER_STATS
|
|
|
|
extern int timer_stats_active;
|
|
|
|
#define TIMER_STATS_FLAG_DEFERRABLE 0x1
|
|
|
|
extern void init_timer_stats(void);
|
|
|
|
extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
|
|
void *timerf, char *comm,
|
|
unsigned int timer_flag);
|
|
|
|
extern void __timer_stats_timer_set_start_info(struct timer_list *timer,
|
|
void *addr);
|
|
|
|
static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
|
|
{
|
|
if (likely(!timer_stats_active))
|
|
return;
|
|
__timer_stats_timer_set_start_info(timer, __builtin_return_address(0));
|
|
}
|
|
|
|
static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
|
|
{
|
|
timer->start_site = NULL;
|
|
}
|
|
#else
|
|
static inline void init_timer_stats(void)
|
|
{
|
|
}
|
|
|
|
static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
|
|
{
|
|
}
|
|
|
|
static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
extern void add_timer(struct timer_list *timer);
|
|
|
|
#ifdef CONFIG_SMP
|
|
extern int try_to_del_timer_sync(struct timer_list *timer);
|
|
extern int del_timer_sync(struct timer_list *timer);
|
|
#else
|
|
# define try_to_del_timer_sync(t) del_timer(t)
|
|
# define del_timer_sync(t) del_timer(t)
|
|
#endif
|
|
|
|
#define del_singleshot_timer_sync(t) del_timer_sync(t)
|
|
|
|
extern void init_timers(void);
|
|
extern void run_local_timers(void);
|
|
struct hrtimer;
|
|
extern enum hrtimer_restart it_real_fn(struct hrtimer *);
|
|
|
|
unsigned long __round_jiffies(unsigned long j, int cpu);
|
|
unsigned long __round_jiffies_relative(unsigned long j, int cpu);
|
|
unsigned long round_jiffies(unsigned long j);
|
|
unsigned long round_jiffies_relative(unsigned long j);
|
|
|
|
unsigned long __round_jiffies_up(unsigned long j, int cpu);
|
|
unsigned long __round_jiffies_up_relative(unsigned long j, int cpu);
|
|
unsigned long round_jiffies_up(unsigned long j);
|
|
unsigned long round_jiffies_up_relative(unsigned long j);
|
|
|
|
#endif
|