sys/sys/usched.h

   1 /*
   2  * SYS/USCHED.H
   3  *
   4  *      Userland scheduler API
   5  *
   6  * $DragonFly: src/sys/sys/usched.h,v 1.12 2006/06/10 22:19:39 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 };
  46
  47 union usched_data {
  48     /*
  49      * BSD4 scheduler.
  50      */
  51     struct {
  52         short   priority;       /* lower is better */
  53         char    unused01;       /* (currently not used) */
  54         char    rqindex;
  55         int     origcpu;
  56         int     estcpu;         /* dynamic priority modification */
  57         u_short rqtype;         /* protected copy of rtprio type */
  58         u_short unused02;
  59     } bsd4;
  60
  61     int         pad[4];         /* PAD for future expansion */
  62 };
  63
  64 /*
  65  * Flags for usched_ctl()
  66  */
  67 #define        USCH_ADD        0x00000001
  68 #define        USCH_REM        0x00000010
  69
  70 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
  71
  72 #define USCHED_SET_SCHEDULER    0
  73 #define USCHED_SET_CPU          1
  74 #define USCHED_ADD_CPU          2
  75 #define USCHED_DEL_CPU          3
  76
  77 /*
  78  * Kernel variables and procedures, or user system calls.
  79  */
  80 #ifdef _KERNEL
  81
  82 extern struct usched    usched_bsd4;
  83 extern struct usched    usched_dummy;
  84
  85 int usched_ctl(struct usched *, int);
  86 struct usched *usched_init(void);
  87
  88 #else
  89
  90 int usched_set(pid_t, int, void *, int);
  91
  92 #endif
  93
  94 #endif
  95