touch_access.c

来自「虚拟地址空间基于文件的操作系统」· C语言 代码 · 共 27 行

#include"memory.h"

void touch_file_access(int file_window_number,int logic_address)
{
	int max_file_number;
	int logic_block_number,physical_block_number;
	struct file_window *f;

	max_file_number=(*(memory_body->file_number));
	if((file_window_number<0)
	||(file_window_number>=max_file_number))
		return;
	f=memory_body->file_window+file_window_number;
	if(f->state!=FILE_OPEN)
		return;
	if(logic_address>=f->file.window_length)
		return;
	physical_block_number=search_physical_block(
		file_window_number,logic_address,
		&logic_block_number);
	if(physical_block_number>=0)
		mark_accessed(physical_block_number);
	return ;
}