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 1.6 2004/06/07 18:10:06 aleph
19 * Remove free pool of timers; use user-provided Timer structure instead
21 * Revision 1.5 2004/06/07 15:57:12 aleph
22 * Add function prototypes
24 * Revision 1.4 2004/06/06 18:25:44 bernie
25 * Rename event macros to look like regular functions.
27 * Revision 1.3 2004/06/06 16:57:18 bernie
28 * Mark some functions INLINE instead of 'extern inline'.
30 * Revision 1.2 2004/06/03 11:27:09 bernie
31 * Add dual-license information.
33 * Revision 1.1 2004/05/23 18:23:30 bernie
34 * Import drv/timer module.
42 #include <mware/list.h>
43 #include <kern/event.h>
45 /*! Number of timer ticks per second. */
46 #define TICKS_PER_SEC 1000
50 Node link; /*!< Link into timers queue */
51 time_t delay; /*!< Timer delay in ms */
52 time_t tick; /*!< Timer will expire at this tick */
53 Event expire; /*!< Event to execute when the timer expires */
57 extern void timer_init(void);
58 extern void timer_add(Timer *timer);
59 extern Timer *timer_abort(Timer *timer);
60 extern void timer_delay(time_t time);
61 extern void timer_udelay(utime_t utime);
62 INLINE time_t timer_gettick(void);
63 INLINE time_t timer_gettick_irq(void);
64 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data);
65 INLINE void timer_set_delay(Timer* timer, time_t delay);
67 #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
69 /*! Set the timer so that it sends a signal when it expires */
70 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs);
71 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs)
73 event_initSignal(&timer->expire, proc, sigs);
76 #endif /* CONFIG_KERN_SIGNALS */
78 /*! Set the timer so that it calls an user hook when it expires */
79 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data)
81 event_initSoftInt(&timer->expire, func, user_data);
84 /*! Set the timer delay (the time before the event will be triggered) */
85 INLINE void timer_set_delay(Timer* timer, time_t delay)
92 * Return the system tick counter (expressed in ms)
93 * This function must disable interrupts on 8/16bit CPUs because the
94 * clock variable is larger than the processor word size and can't
95 * be copied atomically.
97 INLINE time_t timer_gettick(void)
99 extern volatile time_t _clock;
104 DISABLE_IRQSAVE(flags);
106 ENABLE_IRQRESTORE(flags);
113 * Like \c timer_gettick, faster version to be called
114 * from interrupt context only.
116 INLINE time_t timer_gettick_irq(void)
118 extern volatile time_t _clock;
123 #endif /* DRV_TIMER_H */