sys/sys/usched.h

   1 /*
   2  * SYS/USCHED.H
   3  *
   4  *      Userland scheduler API
   5  *
   6  * $DragonFly: src/sys/sys/usched.h,v 1.15 2008/04/21 15:24:47 dillon Exp $
   7  */
   8
   9 #ifndef _SYS_USCHED_H_
  10 #define _SYS_USCHED_H_
  11
  12 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  13
  14 #ifndef _SYS_TYPES_H_
  15 #include <sys/types.h>
  16 #endif
  17 #ifndef _SYS_QUEUE_H_
  18 #include <sys/queue.h>
  19 #endif
  20 #ifndef _SYS_SYSTIMER_H_
  21 #include <sys/systimer.h>
  22 #endif
  23
  24 #define NAME_LENGTH 32
  25
  26 struct lwp;
  27 struct proc;
  28 struct globaldata;
  29
  30 struct usched {
  31     TAILQ_ENTRY(usched) entry;
  32     const char *name;
  33     const char *desc;
  34     void (*usched_register)(void);
  35     void (*usched_unregister)(void);
  36     void (*acquire_curproc)(struct lwp *);
  37     void (*release_curproc)(struct lwp *);
  38     void (*setrunqueue)(struct lwp *);
  39     void (*schedulerclock)(struct lwp *, sysclock_t, sysclock_t);
  40     void (*recalculate)(struct lwp *);
  41     void (*resetpriority)(struct lwp *);
  42     void (*heuristic_forking)(struct lwp *, struct lwp *);
  43     void (*heuristic_exiting)(struct lwp *, struct lwp *);
  44     void (*setcpumask)(struct usched *, cpumask_t);
  45     void (*yield)(struct lwp *);
  46 };
  47
  48 union usched_data {
  49     /*
  50      * BSD4 scheduler.
  51      */
  52     struct {
  53         short   priority;       /* lower is better */
  54         char    unused01;       /* (currently not used) */
  55         char    rqindex;
  56         int     origcpu;
  57         int     estcpu;         /* dynamic priority modification */
  58         u_short rqtype;         /* protected copy of rtprio type */
  59         u_short unused02;
  60     } bsd4;
  61
  62     int         pad[4];         /* PAD for future expansion */
  63 };
  64
  65 /*
  66  * Flags for usched_ctl()
  67  */
  68 #define        USCH_ADD        0x00000001
  69 #define        USCH_REM        0x00000010
  70
  71 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
  72
  73 #define USCHED_SET_SCHEDULER    0
  74 #define USCHED_SET_CPU          1
  75 #define USCHED_ADD_CPU          2
  76 #define USCHED_DEL_CPU          3
  77
  78 /*
  79  * Kernel variables and procedures, or user system calls.
  80  */
  81 #ifdef _KERNEL
  82
  83 extern struct usched    usched_bsd4;
  84 extern struct usched    usched_dummy;
  85 extern cpumask_t usched_mastermask;
  86
  87 int usched_ctl(struct usched *, int);
  88 struct usched *usched_init(void);
  89
  90 #endif
  91
  92 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL)
  93
  94 int usched_set(pid_t, int, void *, int);
  95
  96 #endif
  97
  98 #endif
  99