4 * Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2000 Bernardo Innocenti <bernie@develer.com>
11 * \author Bernardo Innocenti <bernie@develer.com>
13 * \brief Hardware independent timer driver (interface)
18 * Revision 1.1 2004/05/23 18:23:30 bernie
19 * Import drv/timer module.
27 #include <mware/list.h>
28 #include <kern/event.h>
30 /*! Number of timer ticks per second. */
31 #define TICKS_PER_SEC 1000
35 Node link; /*!< Link into timers queue */
36 time_t delay; /*!< Timer delay in ms */
37 time_t tick; /*!< Timer will expire at this tick */
38 Event expire; /*!< Event to execute when the timer expires */
41 extern void timer_init(void);
42 extern Timer *timer_new(void);
43 extern void timer_delete(Timer *timer);
44 extern void timer_add(Timer *timer);
45 extern Timer *timer_abort(Timer *timer);
46 extern void timer_delay(time_t time);
47 extern void timer_udelay(utime_t utime);
48 extern inline time_t timer_gettick(void);
49 extern inline time_t timer_gettick_irq(void);
51 #ifdef CONFIG_KERN_SIGNALS
52 /*! Set the timer so that it sends a signal when it expires */
53 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs)
55 INITEVENT_SIG(&timer->expire, proc, sigs);
59 /*! Set the timer so that it calls an user hook when it expires */
60 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data)
62 INITEVENT_INT(&timer->expire, func, user_data);
65 /*! Set the timer delay (the time before the event will be triggered) */
66 INLINE void timer_set_delay(Timer* timer, time_t delay)
73 * Return the system tick counter (expressed in ms)
74 * This function must disable interrupts on 8/16bit CPUs because the
75 * clock variable is larger than the processor word size and can't
76 * be copied atomically.
78 extern inline time_t timer_gettick(void)
80 extern volatile time_t _clock;
85 DISABLE_IRQSAVE(flags);
87 ENABLE_IRQRESTORE(flags);
94 * Like \c timer_gettick, faster version to be called
95 * from interrupt context only.
97 extern inline time_t timer_gettick_irq(void)
99 extern volatile time_t _clock;
104 #endif /* DRV_TIMER_H */