sys/sys/usched.h

   1 /*
   2  * SYS/USCHED.H
   3  *
   4  *      Userland scheduler API
   5  *
   6  * $DragonFly: src/sys/sys/usched.h,v 1.7 2005/11/16 02:24:33 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_QUEUE_H_
  15 #include <sys/queue.h>
  16 #endif
  17
  18 struct proc;
  19 struct globaldata;
  20
  21 struct usched {
  22     TAILQ_ENTRY(usched) entry;
  23     const char *name;
  24     const char *desc;
  25     void (*usched_register)(void);
  26     void (*usched_unregister)(void);
  27     void (*acquire_curproc)(struct lwp *);
  28     void (*release_curproc)(struct lwp *);
  29     void (*select_curproc)(struct globaldata *);
  30     void (*setrunqueue)(struct lwp *);
  31     void (*remrunqueue)(struct lwp *);
  32     void (*schedulerclock)(struct lwp *, sysclock_t, sysclock_t);
  33     void (*recalculate)(struct lwp *);
  34     void (*resetpriority)(struct lwp *);
  35     void (*heuristic_forking)(struct lwp *, struct lwp *);
  36     void (*heuristic_exiting)(struct lwp *, struct lwp *);
  37     void (*setcpumask)(struct usched *, cpumask_t);
  38 };
  39
  40 union usched_data {
  41     /*
  42      * BSD4 scheduler.
  43      */
  44     struct {
  45         short   priority;       /* lower is better */
  46         char    interactive;    /* (currently not used) */
  47         char    rqindex;
  48         int     origcpu;
  49         int     estcpu;         /* dynamic priority modification */
  50     } bsd4;
  51
  52     int         pad[4];         /* PAD for future expansion */
  53 };
  54
  55 /*
  56  * Flags for usched_ctl()
  57  */
  58 #define        USCH_ADD        0x00000001
  59 #define        USCH_REM        0x00000010
  60
  61 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
  62
  63 /*
  64  * Kernel variables and procedures, or user system calls.
  65  */
  66 #ifdef _KERNEL
  67
  68 extern struct usched    usched_bsd4;
  69
  70 int usched_ctl(struct usched *, int);
  71 struct usched *usched_init(void);
  72
  73 #else
  74
  75 int usched_set(const char *, int);
  76
  77 #endif
  78
  79 #endif
  80