changepage_nur.c

来自「一些操作系统课程实验的程序」· C语言 代码 · 共 18 行

void ChangePage_NUR(int instr_addr, Page * page, int page_num, int * ptr)
{
	int i;
	
	i = (* ptr) % page_num;
	while (1)
	{
		if (page[i].used_count == 0)
		{
			page[i].page_id = instr_addr / 10;
			page[i].used_count = 1;
			* ptr = ++i;
			return ;
		}
		page[i].used_count = 0;
		i = ++i % page_num;
	}
}