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 1.7 2004/06/27 15:26:17 aleph
19 * Declaration fix for build with GCC 3.4
21 * Revision 1.6 2004/06/07 18:10:06 aleph
22 * Remove free pool of timers; use user-provided Timer structure instead
24 * Revision 1.5 2004/06/07 15:57:12 aleph
25 * Add function prototypes
27 * Revision 1.4 2004/06/06 18:25:44 bernie
28 * Rename event macros to look like regular functions.
30 * Revision 1.3 2004/06/06 16:57:18 bernie
31 * Mark some functions INLINE instead of 'extern inline'.
33 * Revision 1.2 2004/06/03 11:27:09 bernie
34 * Add dual-license information.
36 * Revision 1.1 2004/05/23 18:23:30 bernie
37 * Import drv/timer module.
45 #include <mware/list.h>
46 #include <kern/event.h>
48 /*! Number of timer ticks per second. */
49 #define TICKS_PER_SEC 1000
53 Node link; /*!< Link into timers queue */
54 time_t delay; /*!< Timer delay in ms */
55 time_t tick; /*!< Timer will expire at this tick */
56 Event expire; /*!< Event to execute when the timer expires */
60 extern void timer_init(void);
61 extern void timer_add(Timer *timer);
62 extern Timer *timer_abort(Timer *timer);
63 extern void timer_delay(time_t time);
64 extern void timer_udelay(utime_t utime);
65 INLINE time_t timer_gettick(void);
66 INLINE time_t timer_gettick_irq(void);
67 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data);
68 INLINE void timer_set_delay(Timer* timer, time_t delay);
70 #if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
72 /*! Set the timer so that it sends a signal when it expires */
73 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs);
74 INLINE void timer_set_event_signal(Timer* timer, struct Process* proc, sigset_t sigs)
76 event_initSignal(&timer->expire, proc, sigs);
79 #endif /* CONFIG_KERN_SIGNALS */
81 /*! Set the timer so that it calls an user hook when it expires */
82 INLINE void timer_set_event_softint(Timer* timer, Hook func, void* user_data)
84 event_initSoftInt(&timer->expire, func, user_data);
87 /*! Set the timer delay (the time before the event will be triggered) */
88 INLINE void timer_set_delay(Timer* timer, time_t delay)
94 extern volatile time_t _clock;
97 * Return the system tick counter (expressed in ms)
98 * This function must disable interrupts on 8/16bit CPUs because the
99 * clock variable is larger than the processor word size and can't
100 * be copied atomically.
102 INLINE time_t timer_gettick(void)
107 DISABLE_IRQSAVE(flags);
109 ENABLE_IRQRESTORE(flags);
116 * Like \c timer_gettick, faster version to be called
117 * from interrupt context only.
119 INLINE time_t timer_gettick_irq(void)
124 #endif /* DRV_TIMER_H */