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- /*
- * Copyright (C) 2006, 2007 Free Software Foundation, Inc.
- *
- * 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; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Author: Barry deFreese and others.
- */
- #ifndef _KERN_MACH_CLOCK_H_
- #define _KERN_MACH_CLOCK_H_
- /*
- * Mach time-out and time-of-day facility.
- */
- #include <mach/machine/kern_return.h>
- #include <mach/time_value.h>
- #include <kern/host.h>
- #include <kern/queue.h>
- #include <sys/types.h>
- struct io_req;
- typedef struct io_req *io_req_t;
- /* Timers in kernel. */
- extern unsigned long elapsed_ticks; /* number of ticks elapsed since bootup */
- extern int hz; /* number of ticks per second */
- extern int tick; /* number of usec per tick */
- typedef void timer_func_t(void *);
- /* Time-out element. */
- struct timer_elt {
- queue_chain_t chain; /* chain in order of expiration */
- timer_func_t *fcn; /* function to call */
- void * param; /* with this parameter */
- unsigned long ticks; /* expiration time, in ticks */
- int set; /* unset | set | allocated */
- };
- #define TELT_UNSET 0 /* timer not set */
- #define TELT_SET 1 /* timer set */
- #define TELT_ALLOC 2 /* timer allocated from pool */
- typedef struct timer_elt timer_elt_data_t;
- typedef struct timer_elt *timer_elt_t;
- extern void clock_interrupt(
- int usec,
- boolean_t usermode,
- boolean_t basepri,
- vm_offset_t pc);
- extern void softclock (void);
- /* For `private' timer elements. */
- extern void set_timeout(
- timer_elt_t telt,
- unsigned int interval);
- extern boolean_t reset_timeout(timer_elt_t telt);
- #define set_timeout_setup(telt,fcn,param,interval) \
- ((telt)->fcn = (fcn), \
- (telt)->param = (param), \
- (telt)->private = TRUE, \
- set_timeout((telt), (interval)))
- #define reset_timeout_check(t) \
- MACRO_BEGIN \
- if ((t)->set) \
- reset_timeout((t)); \
- MACRO_END
- extern void init_timeout (void);
- /*
- * Record a timestamp in STAMP. Records values in the boot-time clock
- * frame.
- */
- extern void record_time_stamp (time_value_t *stamp);
- /*
- * Read a timestamp in STAMP into RESULT. Returns values in the
- * real-time clock frame.
- */
- extern void read_time_stamp (time_value_t *stamp, time_value_t *result);
- extern kern_return_t host_get_time(
- host_t host,
- time_value_t *current_time);
- extern kern_return_t host_set_time(
- host_t host,
- time_value_t new_time);
- extern kern_return_t host_adjust_time(
- host_t host,
- time_value_t new_adjustment,
- time_value_t *old_adjustment);
- extern void mapable_time_init (void);
- /* For public timer elements. */
- extern void timeout(timer_func_t *fcn, void *param, int interval);
- extern boolean_t untimeout(timer_func_t *fcn, const void *param);
- extern int timeopen(dev_t dev, int flag, io_req_t ior);
- extern void timeclose(dev_t dev, int flag);
- #endif /* _KERN_MACH_CLOCK_H_ */
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