realtime_policy.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1993 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon 
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        realtime_policy.h,v $
   29  * Revision 2.2  93/11/17  17:46:32  dbg
   30  *      Made policy_param_realtime always include start_time and
   31  *      start_when.
   32  *      [93/06/21            dbg]
   33  * 
   34  *      Now has just real-time thread attributes.
   35  *      [93/03/31            dbg]
   36  * 
   37  *      Removed task_attributes.
   38  *      [93/03/26            dbg]
   39  * 
   40  *      Included extended rt_thread attributes.
   41  *      [93/03/24            dbg]
   42  * 
   43  *      64 bit cleanup.
   44  *      [93/02/19            dbg]
   45  * 
   46  *      Pulled together from pset_attributes.h, task_attributes.h,
   47  *      thread_attributes.h.
   48  *      [93/02/04            dbg]
   49  * 
   50  */
   51 
   52 /*
   53  *      Real-time scheduling policies and parameters.
   54  */
   55 
   56 #ifndef _MACH_REALTIME_POLICY_H_
   57 #define _MACH_REALTIME_POLICY_H_
   58 
   59 #include <mach/boolean.h>
   60 #include <mach/time_spec.h>
   61 #include <mach/policy.h>
   62 
   63 #define POLICY_RATE_MONOTONIC           3
   64 #define POLICY_DEADLINE_MONOTONIC       4
   65 #define POLICY_EARLIEST_DEADLINE_FIRST  5
   66 
   67 struct policy_param_realtime {
   68         time_spec_t     start_time;
   69         natural_t       start_when;
   70         time_spec_t     period;
   71         time_spec_t     deadline;
   72 };
   73 typedef struct policy_param_realtime    policy_param_realtime_t;
   74 
   75 #define POLICY_PARAM_REALTIME_COUNT \
   76         (sizeof(struct policy_param_realtime) / sizeof(natural_t))
   77 
   78 /*
   79  *      Values for start_when:
   80  */
   81 #define START_TIME_ABSOLUTE     0       /* start time is absolute */
   82 #define START_TIME_RELATIVE     1       /* start time is relative to
   83                                            current time */
   84 #define START_TIME_NO_CHANGE    2       /* use current start time -
   85                                            just change period and deadline */
   86 
   87 #endif  /* _MACH_REALTIME_POLICY_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/mach/realtime_policy.h

FreeBSD/Linux Kernel Cross Reference
sys/mach/realtime_policy.h