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Annotation of kernel/kern/time_out.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
        !            28:  * All Rights Reserved.
        !            29:  * 
        !            30:  * Permission to use, copy, modify and distribute this software and its
        !            31:  * documentation is hereby granted, provided that both the copyright
        !            32:  * notice and this permission notice appear in all copies of the
        !            33:  * software, derivative works or modified versions, and any portions
        !            34:  * thereof, and that both notices appear in supporting documentation.
        !            35:  * 
        !            36:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            37:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            38:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            39:  * 
        !            40:  * Carnegie Mellon requests users of this software to return to
        !            41:  * 
        !            42:  *  Software Distribution Coordinator  or  [email protected]
        !            43:  *  School of Computer Science
        !            44:  *  Carnegie Mellon University
        !            45:  *  Pittsburgh PA 15213-3890
        !            46:  * 
        !            47:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            48:  * the rights to redistribute these changes.
        !            49:  */
        !            50: 
        !            51: #ifndef        _KERN_TIME_OUT_H_
        !            52: #define        _KERN_TIME_OUT_H_
        !            53: 
        !            54: /*
        !            55:  * Mach time-out and time-of-day facility.
        !            56:  */
        !            57: 
        !            58: /*
        !            59:  *     Timers in kernel:
        !            60:  */
        !            61: extern int     hz;             /* number of ticks per second */
        !            62: extern int     tick;           /* number of usec per tick */
        !            63: 
        !            64: #import <kern/thread_call.h>
        !            65: #import <kern/thread_call_private.h>
        !            66: 
        !            67: /*
        !            68:  *     Time-out element.
        !            69:  */
        !            70: struct timer_elt {
        !            71:        struct _thread_call
        !            72:                        call;
        !            73:        int             (*fcn)();       /* function to call */
        !            74:        char *          param;          /* with this parameter */
        !            75:        unsigned long   ticks;          /* expiration time, in ticks */
        !            76:        int             set;            /* unset | set | allocated */
        !            77: };
        !            78: #define        TELT_UNSET      0               /* timer not set */
        !            79: #define        TELT_SET        1               /* timer set */
        !            80: #define        TELT_ALLOC      2               /* timer allocated from pool */
        !            81: 
        !            82: typedef        struct timer_elt        timer_elt_data_t;
        !            83: typedef        struct timer_elt        *timer_elt_t;
        !            84: 
        !            85: /* for 'private' timer elements */
        !            86: extern void            set_timeout();
        !            87: extern boolean_t       reset_timeout();
        !            88: 
        !            89: #define        set_timeout_setup(telt,fcn,param,interval)      \
        !            90:        ((telt)->fcn = (fcn),                           \
        !            91:         (telt)->param = (param),                       \
        !            92:         (telt)->private = TRUE,                        \
        !            93:         set_timeout((telt), (interval)))
        !            94: 
        !            95: #define        reset_timeout_check(t) \
        !            96:        MACRO_BEGIN \
        !            97:        if ((t)->set) \
        !            98:            reset_timeout((t)); \
        !            99:        MACRO_END
        !           100: 
        !           101: #endif /* _KERN_TIME_OUT_H_ */

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