1 /* 2 ** Copyright 2003-2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved. 3 ** Distributed under the terms of the OpenBeOS License. 4 */ 5 #ifndef _KERNEL_TIMER_H 6 #define _KERNEL_TIMER_H 7 8 9 #include <KernelExport.h> 10 11 12 #ifdef __cplusplus 13 extern "C" { 14 #endif 15 16 struct kernel_args; 17 18 #define B_TIMER_REAL_TIME_BASE 0x2000 19 // For an absolute timer the given time is interpreted as a real-time, not 20 // as a system time. Note that setting the real-time clock will cause the 21 // timer to be updated -- it will expire according to the new clock. 22 // Relative timers are unaffected by this flag. 23 #define B_TIMER_USE_TIMER_STRUCT_TIMES 0x4000 24 // For add_timer(): Use the timer::schedule_time (absolute time) and 25 // timer::period values instead of the period parameter. 26 #define B_TIMER_FLAGS \ 27 (B_TIMER_USE_TIMER_STRUCT_TIMES | B_TIMER_REAL_TIME_BASE) 28 29 /* Timer info structure */ 30 struct timer_info { 31 const char *name; 32 int (*get_priority)(void); 33 status_t (*set_hardware_timer)(bigtime_t timeout); 34 status_t (*clear_hardware_timer)(void); 35 status_t (*init)(struct kernel_args *args); 36 }; 37 38 typedef struct timer_info timer_info; 39 40 41 /* kernel functions */ 42 status_t timer_init(struct kernel_args *); 43 void timer_init_post_rtc(void); 44 void timer_real_time_clock_changed(); 45 int32 timer_interrupt(void); 46 47 #ifdef __cplusplus 48 } 49 #endif 50 51 #endif /* _KERNEL_TIMER_H */ 52