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Annotation of Gnu-Mach/kern/mach_clock.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (C) 2006, 2007 Free Software Foundation, Inc.
        !             3:  *
        !             4:  * This program is free software; you can redistribute it and/or modify
        !             5:  * it under the terms of the GNU General Public License as published by
        !             6:  * the Free Software Foundation; either version 2, or (at your option)
        !             7:  * any later version.
        !             8:  *
        !             9:  * This program is distributed in the hope that it will be useful,
        !            10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            12:  * GNU General Public License for more details.
        !            13:  *
        !            14:  * You should have received a copy of the GNU General Public License
        !            15:  * along with this program; if not, write to the Free Software
        !            16:  * Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
        !            17:  *
        !            18:  * Author: Barry deFreese and others.
        !            19:  */
        !            20: 
        !            21: #ifndef _KERN_MACH_CLOCK_H_
        !            22: #define _KERN_MACH_CLOCK_H_
        !            23: 
        !            24: /*
        !            25:  * Mach time-out and time-of-day facility.
        !            26:  */
        !            27: 
        !            28: #include <mach/machine/kern_return.h>
        !            29: #include <mach/time_value.h>
        !            30: #include <kern/host.h>
        !            31: #include <kern/queue.h>
        !            32: 
        !            33: 
        !            34: /* Timers in kernel.  */
        !            35: extern unsigned long   elapsed_ticks;  /* number of ticks elapsed since bootup */
        !            36: extern int             hz;             /* number of ticks per second */
        !            37: extern int             tick;           /* number of usec per tick */
        !            38: 
        !            39: 
        !            40: typedef void timer_func_t(void *);
        !            41: 
        !            42: /* Time-out element.  */
        !            43: struct timer_elt {
        !            44:        queue_chain_t   chain;          /* chain in order of expiration */
        !            45:        timer_func_t    *fcn;           /* function to call */
        !            46:        void *          param;          /* with this parameter */
        !            47:        unsigned long   ticks;          /* expiration time, in ticks */
        !            48:        int             set;            /* unset | set | allocated */
        !            49: };
        !            50: #define        TELT_UNSET      0               /* timer not set */
        !            51: #define        TELT_SET        1               /* timer set */
        !            52: #define        TELT_ALLOC      2               /* timer allocated from pool */
        !            53: 
        !            54: typedef        struct timer_elt        timer_elt_data_t;
        !            55: typedef        struct timer_elt        *timer_elt_t;
        !            56: 
        !            57: 
        !            58: extern void clock_interrupt(
        !            59:    int usec,
        !            60:    boolean_t usermode,
        !            61:    boolean_t basepri);
        !            62: 
        !            63: extern void softclock (void);
        !            64: 
        !            65: /* For `private' timer elements.  */
        !            66: extern void set_timeout(
        !            67:    timer_elt_t telt,
        !            68:    unsigned int interval);
        !            69: extern boolean_t reset_timeout(timer_elt_t telt);
        !            70: 
        !            71: #define        set_timeout_setup(telt,fcn,param,interval)      \
        !            72:        ((telt)->fcn = (fcn),                           \
        !            73:         (telt)->param = (param),                       \
        !            74:         (telt)->private = TRUE,                        \
        !            75:        set_timeout((telt), (interval)))
        !            76: 
        !            77: #define        reset_timeout_check(t)                          \
        !            78:        MACRO_BEGIN                                     \
        !            79:        if ((t)->set)                                   \
        !            80:            reset_timeout((t));                         \
        !            81:        MACRO_END
        !            82: 
        !            83: extern void init_timeout (void);
        !            84: 
        !            85: /* Read the current time into STAMP.  */
        !            86: extern void record_time_stamp (time_value_t *stamp);
        !            87: 
        !            88: extern kern_return_t host_get_time(
        !            89:    host_t host,
        !            90:    time_value_t *current_time);
        !            91: 
        !            92: extern kern_return_t host_set_time(
        !            93:    host_t host,
        !            94:    time_value_t new_time);
        !            95: 
        !            96: extern kern_return_t host_adjust_time(
        !            97:    host_t host,
        !            98:    time_value_t new_adjustment,
        !            99:    time_value_t *old_adjustment);
        !           100: 
        !           101: extern void mapable_time_init (void);
        !           102: 
        !           103: /* For public timer elements.  */
        !           104: extern void timeout(timer_func_t *fcn, void *param, int interval);
        !           105: extern boolean_t untimeout(timer_func_t *fcn, void *param);
        !           106: 
        !           107: #endif /* _KERN_MACH_CLOCK_H_ */

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