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/*
* Creation Date: <1999/02/18 22:36:58 samuel>
* Time-stamp: <2001/06/24 17:37:05 samuel>
*
* <timer.h>
*
* Timer handling
*
* Copyright (C) 1999, 2000, 2001 Samuel Rydh (samuel@ibrium.se)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation
*
*/
#ifndef _H_TIMER
#define _H_TIMER
#include <sys/types.h>
#include <sys/time.h>
/************************************************************************/
/* Initialize / mainloop-interface */
/************************************************************************/
extern void timer_init( void );
extern void timer_cleanup( void );
extern void _timer_expired( void ); /* private */
/* exports for mainloop.c */
extern void doze( void );
extern void abort_doze( void );
static inline void do_timer_stuff( int has_expired ) {
extern int __recalc_timer;
if( __recalc_timer || has_expired )
_timer_expired();
}
static inline void clear_abort_doze( void ) {
extern volatile int __abort_doze;
__abort_doze = 0;
}
/************************************************************************/
/* Client interface */
/************************************************************************/
/* mticks are measured in DEC units (machine dependent) */
typedef void (*timer_fp)( ulong id, void *usr );
extern int settimer_abs_mticks( ullong mt, timer_fp tproc, void *usr, int activate );
static int settimer_usecs( ulong usecs, timer_fp tproc, void *usr );
extern void cancel_timer( ulong id );
extern int new_ptimer( timer_fp tproc, void *usr );
extern void free_ptimer( int id );
extern int restart_ptimer( int id, ulong uperiod, int allow_skip );
extern int resume_ptimer( int id );
/************************************************************************/
/* Mticks util */
/************************************************************************/
extern ullong get_mticks_( void ); /* in misc.S */
static inline ulong get_tbl( void ){
ulong ret;
asm volatile("mftbl %0" : "=r" (ret) : );
return ret;
}
/* private */
extern ulong __ticks_per_usec_num;
extern ulong __ticks_per_usec_den;
static inline ullong usecs_to_mticks_( ulong usecs ) {
return (ullong)__ticks_per_usec_num * usecs / __ticks_per_usec_den;
}
static inline ulong mticks_to_usecs_( ullong mt ) {
return (mt * __ticks_per_usec_den) / __ticks_per_usec_num;
}
static inline int settimer_usecs( ulong usecs, timer_fp tproc, void *usr ) {
return settimer_abs_mticks( usecs_to_mticks_(usecs)+get_mticks_(), tproc, usr, 1 );
}
static inline int settimer_mticks_( ullong mt, timer_fp tproc, void *usr ) {
return settimer_abs_mticks( get_mticks_() + mt, tproc, usr, 1 );
}
#endif /* _H_TIMER */
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