diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/hrtimer.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/hrtimer.h | 453 |
1 files changed, 0 insertions, 453 deletions
diff --git a/ANDROID_3.4.5/include/linux/hrtimer.h b/ANDROID_3.4.5/include/linux/hrtimer.h deleted file mode 100644 index fd0dc30c..00000000 --- a/ANDROID_3.4.5/include/linux/hrtimer.h +++ /dev/null @@ -1,453 +0,0 @@ -/* - * include/linux/hrtimer.h - * - * hrtimers - High-resolution kernel timers - * - * Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de> - * Copyright(C) 2005, Red Hat, Inc., Ingo Molnar - * - * data type definitions, declarations, prototypes - * - * Started by: Thomas Gleixner and Ingo Molnar - * - * For licencing details see kernel-base/COPYING - */ -#ifndef _LINUX_HRTIMER_H -#define _LINUX_HRTIMER_H - -#include <linux/rbtree.h> -#include <linux/ktime.h> -#include <linux/init.h> -#include <linux/list.h> -#include <linux/wait.h> -#include <linux/percpu.h> -#include <linux/timer.h> -#include <linux/timerqueue.h> - -struct hrtimer_clock_base; -struct hrtimer_cpu_base; - -/* - * Mode arguments of xxx_hrtimer functions: - */ -enum hrtimer_mode { - HRTIMER_MODE_ABS = 0x0, /* Time value is absolute */ - HRTIMER_MODE_REL = 0x1, /* Time value is relative to now */ - HRTIMER_MODE_PINNED = 0x02, /* Timer is bound to CPU */ - HRTIMER_MODE_ABS_PINNED = 0x02, - HRTIMER_MODE_REL_PINNED = 0x03, -}; - -/* - * Return values for the callback function - */ -enum hrtimer_restart { - HRTIMER_NORESTART, /* Timer is not restarted */ - HRTIMER_RESTART, /* Timer must be restarted */ -}; - -/* - * Values to track state of the timer - * - * Possible states: - * - * 0x00 inactive - * 0x01 enqueued into rbtree - * 0x02 callback function running - * 0x04 timer is migrated to another cpu - * - * Special cases: - * 0x03 callback function running and enqueued - * (was requeued on another CPU) - * 0x05 timer was migrated on CPU hotunplug - * - * The "callback function running and enqueued" status is only possible on - * SMP. It happens for example when a posix timer expired and the callback - * queued a signal. Between dropping the lock which protects the posix timer - * and reacquiring the base lock of the hrtimer, another CPU can deliver the - * signal and rearm the timer. We have to preserve the callback running state, - * as otherwise the timer could be removed before the softirq code finishes the - * the handling of the timer. - * - * The HRTIMER_STATE_ENQUEUED bit is always or'ed to the current state - * to preserve the HRTIMER_STATE_CALLBACK in the above scenario. This - * also affects HRTIMER_STATE_MIGRATE where the preservation is not - * necessary. HRTIMER_STATE_MIGRATE is cleared after the timer is - * enqueued on the new cpu. - * - * All state transitions are protected by cpu_base->lock. - */ -#define HRTIMER_STATE_INACTIVE 0x00 -#define HRTIMER_STATE_ENQUEUED 0x01 -#define HRTIMER_STATE_CALLBACK 0x02 -#define HRTIMER_STATE_MIGRATE 0x04 - -/** - * struct hrtimer - the basic hrtimer structure - * @node: timerqueue node, which also manages node.expires, - * the absolute expiry time in the hrtimers internal - * representation. The time is related to the clock on - * which the timer is based. Is setup by adding - * slack to the _softexpires value. For non range timers - * identical to _softexpires. - * @_softexpires: the absolute earliest expiry time of the hrtimer. - * The time which was given as expiry time when the timer - * was armed. - * @function: timer expiry callback function - * @base: pointer to the timer base (per cpu and per clock) - * @state: state information (See bit values above) - * @start_site: timer statistics field to store the site where the timer - * was started - * @start_comm: timer statistics field to store the name of the process which - * started the timer - * @start_pid: timer statistics field to store the pid of the task which - * started the timer - * - * The hrtimer structure must be initialized by hrtimer_init() - */ -struct hrtimer { - struct timerqueue_node node; - ktime_t _softexpires; - enum hrtimer_restart (*function)(struct hrtimer *); - struct hrtimer_clock_base *base; - unsigned long state; -#ifdef CONFIG_TIMER_STATS - int start_pid; - void *start_site; - char start_comm[16]; -#endif -}; - -/** - * struct hrtimer_sleeper - simple sleeper structure - * @timer: embedded timer structure - * @task: task to wake up - * - * task is set to NULL, when the timer expires. - */ -struct hrtimer_sleeper { - struct hrtimer timer; - struct task_struct *task; -}; - -/** - * struct hrtimer_clock_base - the timer base for a specific clock - * @cpu_base: per cpu clock base - * @index: clock type index for per_cpu support when moving a - * timer to a base on another cpu. - * @clockid: clock id for per_cpu support - * @active: red black tree root node for the active timers - * @resolution: the resolution of the clock, in nanoseconds - * @get_time: function to retrieve the current time of the clock - * @softirq_time: the time when running the hrtimer queue in the softirq - * @offset: offset of this clock to the monotonic base - */ -struct hrtimer_clock_base { - struct hrtimer_cpu_base *cpu_base; - int index; - clockid_t clockid; - struct timerqueue_head active; - ktime_t resolution; - ktime_t (*get_time)(void); - ktime_t softirq_time; - ktime_t offset; -}; - -enum hrtimer_base_type { - HRTIMER_BASE_MONOTONIC, - HRTIMER_BASE_REALTIME, - HRTIMER_BASE_BOOTTIME, - HRTIMER_MAX_CLOCK_BASES, -}; - -/* - * struct hrtimer_cpu_base - the per cpu clock bases - * @lock: lock protecting the base and associated clock bases - * and timers - * @active_bases: Bitfield to mark bases with active timers - * @expires_next: absolute time of the next event which was scheduled - * via clock_set_next_event() - * @hres_active: State of high resolution mode - * @hang_detected: The last hrtimer interrupt detected a hang - * @nr_events: Total number of hrtimer interrupt events - * @nr_retries: Total number of hrtimer interrupt retries - * @nr_hangs: Total number of hrtimer interrupt hangs - * @max_hang_time: Maximum time spent in hrtimer_interrupt - * @clock_base: array of clock bases for this cpu - */ -struct hrtimer_cpu_base { - raw_spinlock_t lock; - unsigned long active_bases; -#ifdef CONFIG_HIGH_RES_TIMERS - ktime_t expires_next; - int hres_active; - int hang_detected; - unsigned long nr_events; - unsigned long nr_retries; - unsigned long nr_hangs; - ktime_t max_hang_time; -#endif - struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES]; -}; - -static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time) -{ - timer->node.expires = time; - timer->_softexpires = time; -} - -static inline void hrtimer_set_expires_range(struct hrtimer *timer, ktime_t time, ktime_t delta) -{ - timer->_softexpires = time; - timer->node.expires = ktime_add_safe(time, delta); -} - -static inline void hrtimer_set_expires_range_ns(struct hrtimer *timer, ktime_t time, unsigned long delta) -{ - timer->_softexpires = time; - timer->node.expires = ktime_add_safe(time, ns_to_ktime(delta)); -} - -static inline void hrtimer_set_expires_tv64(struct hrtimer *timer, s64 tv64) -{ - timer->node.expires.tv64 = tv64; - timer->_softexpires.tv64 = tv64; -} - -static inline void hrtimer_add_expires(struct hrtimer *timer, ktime_t time) -{ - timer->node.expires = ktime_add_safe(timer->node.expires, time); - timer->_softexpires = ktime_add_safe(timer->_softexpires, time); -} - -static inline void hrtimer_add_expires_ns(struct hrtimer *timer, u64 ns) -{ - timer->node.expires = ktime_add_ns(timer->node.expires, ns); - timer->_softexpires = ktime_add_ns(timer->_softexpires, ns); -} - -static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer) -{ - return timer->node.expires; -} - -static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer) -{ - return timer->_softexpires; -} - -static inline s64 hrtimer_get_expires_tv64(const struct hrtimer *timer) -{ - return timer->node.expires.tv64; -} -static inline s64 hrtimer_get_softexpires_tv64(const struct hrtimer *timer) -{ - return timer->_softexpires.tv64; -} - -static inline s64 hrtimer_get_expires_ns(const struct hrtimer *timer) -{ - return ktime_to_ns(timer->node.expires); -} - -static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer) -{ - return ktime_sub(timer->node.expires, timer->base->get_time()); -} - -#ifdef CONFIG_HIGH_RES_TIMERS -struct clock_event_device; - -extern void hrtimer_interrupt(struct clock_event_device *dev); - -/* - * In high resolution mode the time reference must be read accurate - */ -static inline ktime_t hrtimer_cb_get_time(struct hrtimer *timer) -{ - return timer->base->get_time(); -} - -static inline int hrtimer_is_hres_active(struct hrtimer *timer) -{ - return timer->base->cpu_base->hres_active; -} - -extern void hrtimer_peek_ahead_timers(void); - -/* - * The resolution of the clocks. The resolution value is returned in - * the clock_getres() system call to give application programmers an - * idea of the (in)accuracy of timers. Timer values are rounded up to - * this resolution values. - */ -# define HIGH_RES_NSEC 1 -# define KTIME_HIGH_RES (ktime_t) { .tv64 = HIGH_RES_NSEC } -# define MONOTONIC_RES_NSEC HIGH_RES_NSEC -# define KTIME_MONOTONIC_RES KTIME_HIGH_RES - -#else - -# define MONOTONIC_RES_NSEC LOW_RES_NSEC -# define KTIME_MONOTONIC_RES KTIME_LOW_RES - -static inline void hrtimer_peek_ahead_timers(void) { } - -/* - * In non high resolution mode the time reference is taken from - * the base softirq time variable. - */ -static inline ktime_t hrtimer_cb_get_time(struct hrtimer *timer) -{ - return timer->base->softirq_time; -} - -static inline int hrtimer_is_hres_active(struct hrtimer *timer) -{ - return 0; -} -#endif - -extern void clock_was_set(void); -#ifdef CONFIG_TIMERFD -extern void timerfd_clock_was_set(void); -#else -static inline void timerfd_clock_was_set(void) { } -#endif -extern void hrtimers_resume(void); - -extern ktime_t ktime_get(void); -extern ktime_t ktime_get_real(void); -extern ktime_t ktime_get_boottime(void); -extern ktime_t ktime_get_monotonic_offset(void); - -DECLARE_PER_CPU(struct tick_device, tick_cpu_device); - - -/* Exported timer functions: */ - -/* Initialize timers: */ -extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock, - enum hrtimer_mode mode); - -#ifdef CONFIG_DEBUG_OBJECTS_TIMERS -extern void hrtimer_init_on_stack(struct hrtimer *timer, clockid_t which_clock, - enum hrtimer_mode mode); - -extern void destroy_hrtimer_on_stack(struct hrtimer *timer); -#else -static inline void hrtimer_init_on_stack(struct hrtimer *timer, - clockid_t which_clock, - enum hrtimer_mode mode) -{ - hrtimer_init(timer, which_clock, mode); -} -static inline void destroy_hrtimer_on_stack(struct hrtimer *timer) { } -#endif - -/* Basic timer operations: */ -extern int hrtimer_start(struct hrtimer *timer, ktime_t tim, - const enum hrtimer_mode mode); -extern int hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, - unsigned long range_ns, const enum hrtimer_mode mode); -extern int -__hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, - unsigned long delta_ns, - const enum hrtimer_mode mode, int wakeup); - -extern int hrtimer_cancel(struct hrtimer *timer); -extern int hrtimer_try_to_cancel(struct hrtimer *timer); - -static inline int hrtimer_start_expires(struct hrtimer *timer, - enum hrtimer_mode mode) -{ - unsigned long delta; - ktime_t soft, hard; - soft = hrtimer_get_softexpires(timer); - hard = hrtimer_get_expires(timer); - delta = ktime_to_ns(ktime_sub(hard, soft)); - return hrtimer_start_range_ns(timer, soft, delta, mode); -} - -static inline int hrtimer_restart(struct hrtimer *timer) -{ - return hrtimer_start_expires(timer, HRTIMER_MODE_ABS); -} - -/* Query timers: */ -extern ktime_t hrtimer_get_remaining(const struct hrtimer *timer); -extern int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp); - -extern ktime_t hrtimer_get_next_event(void); - -/* - * A timer is active, when it is enqueued into the rbtree or the - * callback function is running or it's in the state of being migrated - * to another cpu. - */ -static inline int hrtimer_active(const struct hrtimer *timer) -{ - return timer->state != HRTIMER_STATE_INACTIVE; -} - -/* - * Helper function to check, whether the timer is on one of the queues - */ -static inline int hrtimer_is_queued(struct hrtimer *timer) -{ - return timer->state & HRTIMER_STATE_ENQUEUED; -} - -/* - * Helper function to check, whether the timer is running the callback - * function - */ -static inline int hrtimer_callback_running(struct hrtimer *timer) -{ - return timer->state & HRTIMER_STATE_CALLBACK; -} - -/* Forward a hrtimer so it expires after now: */ -extern u64 -hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval); - -/* Forward a hrtimer so it expires after the hrtimer's current now */ -static inline u64 hrtimer_forward_now(struct hrtimer *timer, - ktime_t interval) -{ - return hrtimer_forward(timer, timer->base->get_time(), interval); -} - -/* Precise sleep: */ -extern long hrtimer_nanosleep(struct timespec *rqtp, - struct timespec __user *rmtp, - const enum hrtimer_mode mode, - const clockid_t clockid); -extern long hrtimer_nanosleep_restart(struct restart_block *restart_block); - -extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, - struct task_struct *tsk); - -extern int schedule_hrtimeout_range(ktime_t *expires, unsigned long delta, - const enum hrtimer_mode mode); -extern int schedule_hrtimeout_range_clock(ktime_t *expires, - unsigned long delta, const enum hrtimer_mode mode, int clock); -extern int schedule_hrtimeout(ktime_t *expires, const enum hrtimer_mode mode); - -/* Soft interrupt function to run the hrtimer queues: */ -extern void hrtimer_run_queues(void); -extern void hrtimer_run_pending(void); - -/* Bootup initialization: */ -extern void __init hrtimers_init(void); - -#if BITS_PER_LONG < 64 -extern u64 ktime_divns(const ktime_t kt, s64 div); -#else /* BITS_PER_LONG < 64 */ -# define ktime_divns(kt, div) (u64)((kt).tv64 / (div)) -#endif - -/* Show pending timers: */ -extern void sysrq_timer_list_show(void); - -#endif |