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 1.3 2004/06/06 16:57:18 bernie
19 * Mark some functions INLINE instead of 'extern inline'.
21 * Revision 1.2 2004/06/03 11:27:09 bernie
22 * Add dual-license information.
24 * Revision 1.1 2004/05/23 18:23:30 bernie
25 * Import drv/timer module.
33 #include <mware/list.h>
34 #include <kern/event.h>
36 /*! Number of timer ticks per second. */
37 #define TICKS_PER_SEC 1000
41 Node link; /*!< Link into timers queue */
42 time_t delay; /*!< Timer delay in ms */
43 time_t tick; /*!< Timer will expire at this tick */
44 Event expire; /*!< Event to execute when the timer expires */
47 extern void timer_init(void);
48 extern Timer *timer_new(void);
49 extern void timer_delete(Timer *timer);
50 extern void timer_add(Timer *timer);
51 extern Timer *timer_abort(Timer *timer);
52 extern void timer_delay(time_t time);
53 extern void timer_udelay(utime_t utime);
54 INLINE time_t timer_gettick(void);
55 INLINE time_t timer_gettick_irq(void);
57 #ifdef CONFIG_KERN_SIGNALS
58 /*! Set the timer so that it sends a signal when it expires */
59 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs)
61 INITEVENT_SIG(&timer->expire, proc, sigs);
65 /*! Set the timer so that it calls an user hook when it expires */
66 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data)
68 INITEVENT_INT(&timer->expire, func, user_data);
71 /*! Set the timer delay (the time before the event will be triggered) */
72 INLINE void timer_set_delay(Timer* timer, time_t delay)
79 * Return the system tick counter (expressed in ms)
80 * This function must disable interrupts on 8/16bit CPUs because the
81 * clock variable is larger than the processor word size and can't
82 * be copied atomically.
84 INLINE time_t timer_gettick(void)
86 extern volatile time_t _clock;
91 DISABLE_IRQSAVE(flags);
93 ENABLE_IRQRESTORE(flags);
100 * Like \c timer_gettick, faster version to be called
101 * from interrupt context only.
103 INLINE time_t timer_gettick_irq(void)
105 extern volatile time_t _clock;
110 #endif /* DRV_TIMER_H */