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Annotation of funnyos/sys/kern_sched.h, Revision 1.2

1.1       nbrk        1: /*
1.2     ! nbrk        2:  * $Id: kern_sched.h,v 1.1 2007/11/19 15:54:33 nbrk Exp $
1.1       nbrk        3:  */
                      4: #ifndef _SYS_KERN_SCHED_H
                      5: #define _SYS_KERN_SCHED_H
                      6: #include <sys/types.h>
                      7:
                      8: /*
                      9:  * Task header is used by user to describe task in config.c
                     10:  */
                     11: struct taskheader {
                     12:        const char *th_name;                            /* task name */
1.2     ! nbrk       13:        uint8_t         th_priority;                    /* priority, bigger the value = higher priority */
        !            14:        void            (*th_enter)(void);              /* entry point */
1.1       nbrk       15: };
                     16:
                     17: /*
                     18:  * Kernel sees each system task as struct task;
                     19:  * it is used for scheduling and context switches.
                     20:  */
                     21: struct task {
                     22:        struct taskheader       *ta_theader;    /* points to user-described data */
                     23:        uint8_t                         ta_taskid;              /* task id (TID) */
                     24:
                     25:        uint8_t                         ta_state;               /* task state (running, blocked, etc.) */
                     26:        uint32_t                        ta_timeo;               /* timeout (in HZ) if task is blocked */
                     27:        uint32_t                        *ta_stackptr;   /* task stack addr (used to switch-back to that task) */
1.2     ! nbrk       28:
        !            29:        struct task             *ta_nextp;
1.1       nbrk       30: };
                     31:
                     32: /*
                     33:  * Tasks states.
                     34:  */
                     35: #define TASK_NOSCHED   0x00    /* task not ready or halted; will not schedule this */
                     36: #define TASK_READY             0x01    /* ready for schedule */
                     37: #define TASK_RUNNING   0x02    /* running now */
                     38: #define TASK_SLEEPING  0x04    /* task waits for (planned) timeout */
1.2     ! nbrk       39:
        !            40:
        !            41: /*
        !            42:  * Functions.
        !            43:  */
        !            44: void   sched_init(void);
1.1       nbrk       45:
                     46:
                     47: #endif /* not _SYS_KERN_SCHED_H */
                     48: