sched_policy_config.c

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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:        sched_policy_config.c,v $
   29  * Revision 2.2  93/11/17  17:21:49  dbg
   30  *      Conditionalized on MACH_RT.
   31  *      [93/05/17            dbg]
   32  * 
   33  *      Created.
   34  *      [93/04/02            dbg]
   35  * 
   36  */
   37 
   38 #include <mach_rt.h>
   39 
   40 /*
   41  *      List of scheduling policies.
   42  *
   43  *      The list is kept as an array - scheduling policies are
   44  *      not (yet) added or removed while the system is running.
   45  *
   46  *      Rank is determined by the position in the array.  The
   47  *      higher-indexed policies have higher rank.
   48  */
   49 
   50 #include <kern/sched_policy.h>
   51 
   52 extern struct sched_policy      bg_sched_policy,
   53                                 ts_sched_policy,
   54                                 fp_sched_policy;
   55 #if     MACH_RT
   56 extern struct sched_policy      dm_sched_policy,
   57                                 rm_sched_policy,
   58                                 edf_sched_policy;
   59 #endif
   60 
   61 sched_policy_t  sched_policy_array[] = {
   62         &bg_sched_policy,
   63         &ts_sched_policy,
   64         &fp_sched_policy,
   65 #if     MACH_RT
   66         &rm_sched_policy,
   67         &dm_sched_policy,
   68         &edf_sched_policy
   69 #endif
   70 };
   71 
   72 int     sched_policy_count = sizeof(sched_policy_array)
   73                                 / sizeof(sched_policy_array[0]);
   74 
   75 void
   76 sched_policy_init(void)
   77 {
   78         /*
   79          *      Run down the list, assigning rank.
   80          */
   81         int     i;
   82 
   83         for (i = 0; i < sched_policy_count; i++)
   84             sched_policy_array[i]->rank = i;
   85 }
   86 
   87 /*
   88  *      Lookup a scheduling policy by name.
   89  */
   90 sched_policy_t
   91 sched_policy_lookup(
   92         int     policy)
   93 {
   94         int     i;
   95 
   96         for (i = 0; i < sched_policy_count; i++)
   97             if (sched_policy_array[i]->name == policy)
   98                 return sched_policy_array[i];
   99 
  100         return 0;
  101 }
  102

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FreeBSD/Linux Kernel Cross Reference sys/kern/sched_policy_config.c

FreeBSD/Linux Kernel Cross Reference
sys/kern/sched_policy_config.c