4 * Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2000 Bernardo Innocenti <bernie@develer.com>
6 * This file is part of DevLib - See devlib/README for information.
11 * \author Bernardo Innocenti <bernie@develer.com>
13 * \brief Hardware independent timer driver (interface)
18 * Revision 1.2 2004/06/03 11:27:09 bernie
19 * Add dual-license information.
21 * Revision 1.1 2004/05/23 18:23:30 bernie
22 * Import drv/timer module.
30 #include <mware/list.h>
31 #include <kern/event.h>
33 /*! Number of timer ticks per second. */
34 #define TICKS_PER_SEC 1000
38 Node link; /*!< Link into timers queue */
39 time_t delay; /*!< Timer delay in ms */
40 time_t tick; /*!< Timer will expire at this tick */
41 Event expire; /*!< Event to execute when the timer expires */
44 extern void timer_init(void);
45 extern Timer *timer_new(void);
46 extern void timer_delete(Timer *timer);
47 extern void timer_add(Timer *timer);
48 extern Timer *timer_abort(Timer *timer);
49 extern void timer_delay(time_t time);
50 extern void timer_udelay(utime_t utime);
51 extern inline time_t timer_gettick(void);
52 extern inline time_t timer_gettick_irq(void);
54 #ifdef CONFIG_KERN_SIGNALS
55 /*! Set the timer so that it sends a signal when it expires */
56 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs)
58 INITEVENT_SIG(&timer->expire, proc, sigs);
62 /*! Set the timer so that it calls an user hook when it expires */
63 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data)
65 INITEVENT_INT(&timer->expire, func, user_data);
68 /*! Set the timer delay (the time before the event will be triggered) */
69 INLINE void timer_set_delay(Timer* timer, time_t delay)
76 * Return the system tick counter (expressed in ms)
77 * This function must disable interrupts on 8/16bit CPUs because the
78 * clock variable is larger than the processor word size and can't
79 * be copied atomically.
81 extern inline time_t timer_gettick(void)
83 extern volatile time_t _clock;
88 DISABLE_IRQSAVE(flags);
90 ENABLE_IRQRESTORE(flags);
97 * Like \c timer_gettick, faster version to be called
98 * from interrupt context only.
100 extern inline time_t timer_gettick_irq(void)
102 extern volatile time_t _clock;
107 #endif /* DRV_TIMER_H */