[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / posix-timers.h

#ifndef _linux_POSIX_TIMERS_H
#define _linux_POSIX_TIMERS_H

#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/sched.h>

union cpu_time_count {
	cputime_t cpu;
	unsigned long long sched;
};

struct cpu_timer_list {
	struct list_head entry;
	union cpu_time_count expires, incr;
	struct task_struct *task;
	int firing;
};

#define CPUCLOCK_PID(clock)		((pid_t) ~((clock) >> 3))
#define CPUCLOCK_PERTHREAD(clock) \
	(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
#define CPUCLOCK_PID_MASK	7
#define CPUCLOCK_PERTHREAD_MASK	4
#define CPUCLOCK_WHICH(clock)	((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
#define CPUCLOCK_CLOCK_MASK	3
#define CPUCLOCK_PROF		0
#define CPUCLOCK_VIRT		1
#define CPUCLOCK_SCHED		2
#define CPUCLOCK_MAX		3

#define MAKE_PROCESS_CPUCLOCK(pid, clock) \
	((~(clockid_t) (pid) << 3) | (clockid_t) (clock))
#define MAKE_THREAD_CPUCLOCK(tid, clock) \
	MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK)

/* POSIX.1b interval timer structure. */
struct k_itimer {
	struct list_head list;		/* free/ allocate list */
	spinlock_t it_lock;
	clockid_t it_clock;		/* which timer type */
	timer_t it_id;			/* timer id */
	int it_overrun;			/* overrun on pending signal  */
	int it_overrun_last;		/* overrun on last delivered signal */
	int it_requeue_pending;         /* waiting to requeue this timer */
#define REQUEUE_PENDING 1
	int it_sigev_notify;		/* notify word of sigevent struct */
	int it_sigev_signo;		/* signo word of sigevent struct */
	sigval_t it_sigev_value;	/* value word of sigevent struct */
	struct task_struct *it_process;	/* process to send signal to */
	struct sigqueue *sigq;		/* signal queue entry. */
	union {
		struct {
			struct timer_list timer;
			struct list_head abs_timer_entry; /* clock abs_timer_list */
			struct timespec wall_to_prev;   /* wall_to_monotonic used when set */
			unsigned long incr; /* interval in jiffies */
		} real;
		struct cpu_timer_list cpu;
		struct {
			unsigned int clock;
			unsigned int node;
			unsigned long incr;
			unsigned long expires;
		} mmtimer;
	} it;
};

struct k_clock_abs {
	struct list_head list;
	spinlock_t lock;
};
struct k_clock {
	int res;		/* in nano seconds */
	int (*clock_getres) (clockid_t which_clock, struct timespec *tp);
	struct k_clock_abs *abs_struct;
	int (*clock_set) (clockid_t which_clock, struct timespec * tp);
	int (*clock_get) (clockid_t which_clock, struct timespec * tp);
	int (*timer_create) (struct k_itimer *timer);
	int (*nsleep) (clockid_t which_clock, int flags, struct timespec *);
	int (*timer_set) (struct k_itimer * timr, int flags,
			  struct itimerspec * new_setting,
			  struct itimerspec * old_setting);
	int (*timer_del) (struct k_itimer * timr);
#define TIMER_RETRY 1
	void (*timer_get) (struct k_itimer * timr,
			   struct itimerspec * cur_setting);
};

void register_posix_clock(clockid_t clock_id, struct k_clock *new_clock);

/* Error handlers for timer_create, nanosleep and settime */
int do_posix_clock_notimer_create(struct k_itimer *timer);
int do_posix_clock_nonanosleep(clockid_t, int flags, struct timespec *);
int do_posix_clock_nosettime(clockid_t, struct timespec *tp);

/* function to call to trigger timer event */
int posix_timer_event(struct k_itimer *timr, int si_private);

struct now_struct {
	unsigned long jiffies;
};

#define posix_get_now(now) (now)->jiffies = jiffies;
#define posix_time_before(timer, now) \
                      time_before((timer)->expires, (now)->jiffies)

#define posix_bump_timer(timr, now)					\
         do {								\
              long delta, orun;						\
	      delta = now.jiffies - (timr)->it.real.timer.expires;	\
              if (delta >= 0) {						\
	           orun = 1 + (delta / (timr)->it.real.incr);		\
	          (timr)->it.real.timer.expires +=			\
			 orun * (timr)->it.real.incr;			\
                  (timr)->it_overrun += orun;				\
              }								\
            }while (0)

int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *);
int posix_cpu_clock_get(clockid_t which_clock, struct timespec *);
int posix_cpu_clock_set(clockid_t which_clock, const struct timespec *tp);
int posix_cpu_timer_create(struct k_itimer *);
int posix_cpu_nsleep(clockid_t, int, struct timespec *);
int posix_cpu_timer_set(struct k_itimer *, int,
			struct itimerspec *, struct itimerspec *);
int posix_cpu_timer_del(struct k_itimer *);
void posix_cpu_timer_get(struct k_itimer *, struct itimerspec *);

void posix_cpu_timer_schedule(struct k_itimer *);

void run_posix_cpu_timers(struct task_struct *);
void posix_cpu_timers_exit(struct task_struct *);
void posix_cpu_timers_exit_group(struct task_struct *);

void set_process_cpu_timer(struct task_struct *, unsigned int,
			   cputime_t *, cputime_t *);

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _linux_POSIX_TIMERS_H
	2	#define _linux_POSIX_TIMERS_H
	3
	4	#include <linux/spinlock.h>
	5	#include <linux/list.h>
	6	#include <linux/sched.h>
	7
	8	union cpu_time_count {
	9	cputime_t cpu;
	10	unsigned long long sched;
	11	};
	12
	13	struct cpu_timer_list {
	14	struct list_head entry;
	15	union cpu_time_count expires, incr;
	16	struct task_struct *task;
	17	int firing;
	18	};
	19
	20	#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
	21	#define CPUCLOCK_PERTHREAD(clock) \
	22	(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
	23	#define CPUCLOCK_PID_MASK 7
	24	#define CPUCLOCK_PERTHREAD_MASK 4
	25	#define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
	26	#define CPUCLOCK_CLOCK_MASK 3
	27	#define CPUCLOCK_PROF 0
	28	#define CPUCLOCK_VIRT 1
	29	#define CPUCLOCK_SCHED 2
	30	#define CPUCLOCK_MAX 3
	31
	32	#define MAKE_PROCESS_CPUCLOCK(pid, clock) \
	33	((~(clockid_t) (pid) << 3) \| (clockid_t) (clock))
	34	#define MAKE_THREAD_CPUCLOCK(tid, clock) \
	35	MAKE_PROCESS_CPUCLOCK((tid), (clock) \| CPUCLOCK_PERTHREAD_MASK)
	36
	37	/* POSIX.1b interval timer structure. */
	38	struct k_itimer {
	39	struct list_head list; /* free/ allocate list */
	40	spinlock_t it_lock;
	41	clockid_t it_clock; /* which timer type */
	42	timer_t it_id; /* timer id */
	43	int it_overrun; /* overrun on pending signal */
	44	int it_overrun_last; /* overrun on last delivered signal */
	45	int it_requeue_pending; /* waiting to requeue this timer */
	46	#define REQUEUE_PENDING 1
	47	int it_sigev_notify; /* notify word of sigevent struct */
	48	int it_sigev_signo; /* signo word of sigevent struct */
	49	sigval_t it_sigev_value; /* value word of sigevent struct */
	50	struct task_struct it_process; / process to send signal to */
	51	struct sigqueue sigq; / signal queue entry. */
	52	union {
	53	struct {
	54	struct timer_list timer;
	55	struct list_head abs_timer_entry; /* clock abs_timer_list */
	56	struct timespec wall_to_prev; /* wall_to_monotonic used when set */
	57	unsigned long incr; /* interval in jiffies */
	58	} real;
	59	struct cpu_timer_list cpu;
	60	struct {
	61	unsigned int clock;
	62	unsigned int node;
	63	unsigned long incr;
	64	unsigned long expires;
65	} mmtimer;
66	} it;
67	};
68
69	struct k_clock_abs {
70	struct list_head list;
71	spinlock_t lock;
72	};
73	struct k_clock {
74	int res; /* in nano seconds */
75	int (clock_getres) (clockid_t which_clock, struct timespec tp);
76	struct k_clock_abs *abs_struct;
77	int (clock_set) (clockid_t which_clock, struct timespec tp);
78	int (clock_get) (clockid_t which_clock, struct timespec tp);
79	int (timer_create) (struct k_itimer timer);
80	int (nsleep) (clockid_t which_clock, int flags, struct timespec );
81	int (timer_set) (struct k_itimer timr, int flags,
82	struct itimerspec * new_setting,
83	struct itimerspec * old_setting);
84	int (timer_del) (struct k_itimer timr);
85	#define TIMER_RETRY 1
86	void (timer_get) (struct k_itimer timr,
87	struct itimerspec * cur_setting);
88	};
89
90	void register_posix_clock(clockid_t clock_id, struct k_clock *new_clock);
91
92	/* Error handlers for timer_create, nanosleep and settime */
93	int do_posix_clock_notimer_create(struct k_itimer *timer);
94	int do_posix_clock_nonanosleep(clockid_t, int flags, struct timespec *);
95	int do_posix_clock_nosettime(clockid_t, struct timespec *tp);
96
97	/* function to call to trigger timer event */
98	int posix_timer_event(struct k_itimer *timr, int si_private);
99
100	struct now_struct {
101	unsigned long jiffies;
102	};
103
104	#define posix_get_now(now) (now)->jiffies = jiffies;
105	#define posix_time_before(timer, now) \
106	time_before((timer)->expires, (now)->jiffies)
107
108	#define posix_bump_timer(timr, now) \
109	do { \
110	long delta, orun; \
111	delta = now.jiffies - (timr)->it.real.timer.expires; \
112	if (delta >= 0) { \
113	orun = 1 + (delta / (timr)->it.real.incr); \
114	(timr)->it.real.timer.expires += \
115	orun * (timr)->it.real.incr; \
116	(timr)->it_overrun += orun; \
117	} \
118	}while (0)
119
120	int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *);
121	int posix_cpu_clock_get(clockid_t which_clock, struct timespec *);
122	int posix_cpu_clock_set(clockid_t which_clock, const struct timespec *tp);
123	int posix_cpu_timer_create(struct k_itimer *);
124	int posix_cpu_nsleep(clockid_t, int, struct timespec *);
125	int posix_cpu_timer_set(struct k_itimer *, int,
126	struct itimerspec , struct itimerspec );
127	int posix_cpu_timer_del(struct k_itimer *);
128	void posix_cpu_timer_get(struct k_itimer , struct itimerspec );
129
130	void posix_cpu_timer_schedule(struct k_itimer *);
131
132	void run_posix_cpu_timers(struct task_struct *);
133	void posix_cpu_timers_exit(struct task_struct *);
134	void posix_cpu_timers_exit_group(struct task_struct *);
135
136	void set_process_cpu_timer(struct task_struct *, unsigned int,
137	cputime_t , cputime_t );
138
139	#endif