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 1.5 2004/06/07 15:57:12 aleph
19 * Add function prototypes
21 * Revision 1.4 2004/06/06 18:25:44 bernie
22 * Rename event macros to look like regular functions.
24 * Revision 1.3 2004/06/06 16:57:18 bernie
25 * Mark some functions INLINE instead of 'extern inline'.
27 * Revision 1.2 2004/06/03 11:27:09 bernie
28 * Add dual-license information.
30 * Revision 1.1 2004/05/23 18:23:30 bernie
31 * Import drv/timer module.
39 #include <mware/list.h>
40 #include <kern/event.h>
42 /*! Number of timer ticks per second. */
43 #define TICKS_PER_SEC 1000
47 Node link; /*!< Link into timers queue */
48 time_t delay; /*!< Timer delay in ms */
49 time_t tick; /*!< Timer will expire at this tick */
50 Event expire; /*!< Event to execute when the timer expires */
54 extern void timer_init(void);
55 extern Timer *timer_new(void);
56 extern void timer_delete(Timer *timer);
57 extern void timer_add(Timer *timer);
58 extern Timer *timer_abort(Timer *timer);
59 extern void timer_delay(time_t time);
60 extern void timer_udelay(utime_t utime);
61 INLINE time_t timer_gettick(void);
62 INLINE time_t timer_gettick_irq(void);
63 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data);
64 INLINE void timer_set_delay(Timer* timer, time_t delay);
66 #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
68 /*! Set the timer so that it sends a signal when it expires */
69 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs);
70 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs)
72 event_initSignal(&timer->expire, proc, sigs);
75 #endif /* CONFIG_KERN_SIGNALS */
77 /*! Set the timer so that it calls an user hook when it expires */
78 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data)
80 event_initSoftInt(&timer->expire, func, user_data);
83 /*! Set the timer delay (the time before the event will be triggered) */
84 INLINE void timer_set_delay(Timer* timer, time_t delay)
91 * Return the system tick counter (expressed in ms)
92 * This function must disable interrupts on 8/16bit CPUs because the
93 * clock variable is larger than the processor word size and can't
94 * be copied atomically.
96 INLINE time_t timer_gettick(void)
98 extern volatile time_t _clock;
103 DISABLE_IRQSAVE(flags);
105 ENABLE_IRQRESTORE(flags);
112 * Like \c timer_gettick, faster version to be called
113 * from interrupt context only.
115 INLINE time_t timer_gettick_irq(void)
117 extern volatile time_t _clock;
122 #endif /* DRV_TIMER_H */