61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
#ifndef _TASK_H_
|
|
#define _TASK_H_
|
|
|
|
#include "memory.h"
|
|
#include "timer.h"
|
|
|
|
#define MAX_TASKS 1000 // 最大任务数量
|
|
#define TASK_GDT0 3 // 定义从GDT的几号开始分配给TSS
|
|
|
|
#define MAX_TASKS_LV 100
|
|
#define MAX_TASKLEVELS 10
|
|
|
|
struct TSS32 {
|
|
int backlink, esp0, ss0, esp1, ss1, esp2, ss2, cr3;
|
|
int eip, eflags, eax, ecx, edx, ebx, esp, ebp, esi, edi;
|
|
int es, cs, ss, ds, fs, gs;
|
|
int ldtr, iomap;
|
|
};
|
|
|
|
struct FIFO32;
|
|
|
|
struct Task {
|
|
int sel, flags; // sel用于存放GDT的编号
|
|
int level, priority;
|
|
struct FIFO32 fifo;
|
|
struct TSS32 tss;
|
|
};
|
|
|
|
struct TaskLevel {
|
|
int running; // 正在运行的任务数量
|
|
int now; // 记录正在运行的任务
|
|
struct Task *tasks[MAX_TASKS_LV];
|
|
};
|
|
|
|
struct TaskCtl {
|
|
int now_lv; // 现在活动中的level
|
|
int lv_change; // 在下次任务切换时是否需要改变level
|
|
struct TaskLevel level[MAX_TASKLEVELS];
|
|
struct Task tasks0[MAX_TASKS];
|
|
};
|
|
|
|
extern struct TaskCtl *taskctl;
|
|
extern struct Timer *task_timer;
|
|
|
|
void load_tr(int tr);
|
|
void far_jmp(int eip, int cs);
|
|
void far_call(int eip, int cs);
|
|
|
|
struct Task *task_init(struct MemMan *memman);
|
|
struct Task *task_alloc(void);
|
|
void task_run(struct Task *task, int level, int priority);
|
|
void task_switch(void);
|
|
void task_sleep(struct Task *task);
|
|
struct Task *task_now(void);
|
|
void task_add(struct Task *task);
|
|
void task_remove(struct Task *task);
|
|
void task_switchsub(void);
|
|
void task_idle(void);
|
|
|
|
#endif // _TASK_H_
|