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 #define USCHED_GET_CPU 4 78 79 /* 80 * Kernel variables and procedures, or user system calls. 81 */ 82 #ifdef _KERNEL 83 84 extern struct usched usched_bsd4; 85 extern struct usched usched_dummy; 86 extern cpumask_t usched_mastermask; 87 88 int usched_ctl(struct usched *, int); 89 struct usched *usched_init(void); 90 91 #endif 92 93 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL) 94 95 int usched_set(pid_t, int, void *, int); 96 97 #endif 98 99 #endif 100 101