day17命令行窗口

闲置任务

当所有任务都进入睡眠的时候会执行的一个任务

添加卫兵

struct TASK *task_init(struct MEMMAN *memman)
{
	int i;
	struct TASK *task, *idle;
	struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *) ADR_GDT;

	taskctl = (struct TASKCTL *) memman_alloc_4k(memman, sizeof (struct TASKCTL));
	for (i = 0; i < MAX_TASKS; i++) {
		taskctl->tasks0[i].flags = 0;
		taskctl->tasks0[i].sel = (TASK_GDT0 + i) * 8;
		set_segmdesc(gdt + TASK_GDT0 + i, 103, (int) &taskctl->tasks0[i].tss, AR_TSS32);
	}
	for (i = 0; i < MAX_TASKLEVELS; i++) {
		taskctl->level[i].running = 0;
		taskctl->level[i].now = 0;
	}

	task = task_alloc();
	task->flags = 2;	
	task->priority = 2; 
	task->level = 0;	
	task_add(task);
	task_switchsub();	
	load_tr(task->sel);
	task_timer = timer_alloc();
	timer_settime(task_timer, task->priority);
	//获取一个卫兵的任务
	idle = task_alloc();
	idle->tss.esp = memman_alloc_4k(memman, 64 * 1024) + 64 * 1024;
	idle->tss.eip = (int) &task_idle;
	idle->tss.es = 1 * 8;
	idle->tss.cs = 2 * 8;
	idle->tss.ss = 1 * 8;
	idle->tss.ds = 1 * 8;
	idle->tss.fs = 1 * 8;
	idle->tss.gs = 1 * 8;
	task_run(idle, MAX_TASKLEVELS - 1, 1);//设置为最低的优先级

	return task;
}

创建命令行窗口

/* sht_cons创建一个命令行任务 */
sht_cons = sheet_alloc(shtctl);
buf_cons = (unsigned char *) memman_alloc_4k(memman, 256 * 165);
sheet_setbuf(sht_cons, buf_cons, 256, 165, -1); /* 透明色なし */
make_window8(buf_cons, 256, 165, "console", 0);
make_textbox8(sht_cons, 8, 28, 240, 128, COL8_000000);
task_cons = task_alloc();
task_cons->tss.esp = memman_alloc_4k(memman, 64 * 1024) + 64 * 1024 - 8;
task_cons->tss.eip = (int) &console_task;
task_cons->tss.es = 1 * 8;
task_cons->tss.cs = 2 * 8;
task_cons->tss.ss = 1 * 8;
task_cons->tss.ds = 1 * 8;
task_cons->tss.fs = 1 * 8;
task_cons->tss.gs = 1 * 8;
*((int *) (task_cons->tss.esp + 4)) = (int) sht_cons;	//这里是要传入的参数
task_run(task_cons, 2, 2); /* level=2, priority=2 */

//命令行任务
void console_task(struct SHEET *sheet)
{
	struct FIFO32 fifo;
	struct TIMER *timer;
	struct TASK *task = task_now();

	int i, fifobuf[128], cursor_x = 8, cursor_c = COL8_000000;
	fifo32_init(&fifo, 128, fifobuf, task);

	timer = timer_alloc();
	timer_init(timer, &fifo, 1);
	timer_settime(timer, 50);

	for (;;) {
		io_cli();
        //由于存在哨兵所以可以直接进行睡眠
		if (fifo32_status(&fifo) == 0) {
			task_sleep(task);
			io_sti();
		} else {
			i = fifo32_get(&fifo);
			io_sti();
			if (i <= 1) { /* 光标使用的定时器 */
				if (i != 0) {
					timer_init(timer, &fifo, 0); /* 下次置0 */
					cursor_c = COL8_FFFFFF;
				} else {
					timer_init(timer, &fifo, 1); /* 下次置 */
					cursor_c = COL8_000000;
				}
				timer_settime(timer, 50);
				boxfill8(sheet->buf, sheet->bxsize, cursor_c, cursor_x, 28, cursor_x + 7, 43);
				sheet_refresh(sheet, cursor_x, 28, cursor_x + 8, 44);
			}
		}
	}
}

对话框的分开绘制

void make_window8(unsigned char *buf, int xsize, int ysize, char *title, char act)
{
	boxfill8(buf, xsize, COL8_C6C6C6, 0,         0,         xsize - 1, 0        );
	boxfill8(buf, xsize, COL8_FFFFFF, 1,         1,         xsize - 2, 1        );
	boxfill8(buf, xsize, COL8_C6C6C6, 0,         0,         0,         ysize - 1);
	boxfill8(buf, xsize, COL8_FFFFFF, 1,         1,         1,         ysize - 2);
	boxfill8(buf, xsize, COL8_848484, xsize - 2, 1,         xsize - 2, ysize - 2);
	boxfill8(buf, xsize, COL8_000000, xsize - 1, 0,         xsize - 1, ysize - 1);
	boxfill8(buf, xsize, COL8_C6C6C6, 2,         2,         xsize - 3, ysize - 3);
	boxfill8(buf, xsize, COL8_848484, 1,         ysize - 2, xsize - 2, ysize - 2);
	boxfill8(buf, xsize, COL8_000000, 0,         ysize - 1, xsize - 1, ysize - 1);
	make_wtitle8(buf, xsize, title, act);
	return;
}

void make_wtitle8(unsigned char *buf, int xsize, char *title, char act)
{
	static char closebtn[14][16] = {
		"OOOOOOOOOOOOOOO@",
		"OQQQQQQQQQQQQQ$@",
		"OQQQQQQQQQQQQQ$@",
		"OQQQ@@QQQQ@@QQ$@",
		"OQQQQ@@QQ@@QQQ$@",
		"OQQQQQ@@@@QQQQ$@",
		"OQQQQQQ@@QQQQQ$@",
		"OQQQQQ@@@@QQQQ$@",
		"OQQQQ@@QQ@@QQQ$@",
		"OQQQ@@QQQQ@@QQ$@",
		"OQQQQQQQQQQQQQ$@",
		"OQQQQQQQQQQQQQ$@",
		"O$$$$$$$$$$$$$$@",
		"@@@@@@@@@@@@@@@@"
	};
	int x, y;
	char c, tc, tbc;
	if (act != 0) {
		tc = COL8_FFFFFF;
		tbc = COL8_000084;
	} else {
		tc = COL8_C6C6C6;
		tbc = COL8_848484;
	}
	boxfill8(buf, xsize, tbc, 3, 3, xsize - 4, 20);
	putfonts8_asc(buf, xsize, 24, 4, tc, title);
	for (y = 0; y < 14; y++) {
		for (x = 0; x < 16; x++) {
			c = closebtn[y][x];
			if (c == '@') {
				c = COL8_000000;
			} else if (c == '$') {
				c = COL8_848484;
			} else if (c == 'Q') {
				c = COL8_C6C6C6;
			} else {
				c = COL8_FFFFFF;
			}
			buf[(5 + y) * xsize + (xsize - 21 + x)] = c;
		}
	}
	return;
}

这样方便对于对话框的头部的颜色的改变

if (i == 256 + 0x0f) { /* Tab改变两个对话框之间进行切换 */
    if (key_to == 0) {
        key_to = 1;
        make_wtitle8(buf_win,  sht_win->bxsize,  "task_a",  0);
        make_wtitle8(buf_cons, sht_cons->bxsize, "console", 1);
    } else {
        key_to = 0;
        make_wtitle8(buf_win,  sht_win->bxsize,  "task_a",  1);
        make_wtitle8(buf_cons, sht_cons->bxsize, "console", 0);
    }
    sheet_refresh(sht_win,  0, 0, sht_win->bxsize,  21);
    sheet_refresh(sht_cons, 0, 0, sht_cons->bxsize, 21);
}
/* 重新显示光标 */
boxfill8(sht_win->buf, sht_win->bxsize, cursor_c, cursor_x, 28, cursor_x + 7, 43);
sheet_refresh(sht_win, cursor_x, 28, cursor_x + 8, 44);
}