filesystem.java

来自「Nachos 5 java version」· Java 代码 · 共 32 行

// PART OF THE MACHINE SIMULATION. DO NOT CHANGE.

package nachos.machine;

/**
 * A file system that allows the user to create, open, and delete files.
 */
public interface FileSystem {
    /**
     * Atomically open a file, optionally creating it if it does not already
     * exist.
     *
     * @param	name	the name of the file to open.
     * @param	create	<tt>true</tt> to create the file if it does not already
     * 			exist, or truncate it to zero length if it does exist.
     * @return	an <tt>OpenFile</tt> representing a new instance of the opened
     *		file, or <tt>null</tt> if the file could not be opened.
     */
    public OpenFile open(String name, boolean create);

    /**
     * Atomically remove an existing file. After a file is removed, it cannot
     * be opened until it is created again with <tt>create</tt>. If the file is
     * already open, it is up to the implementation to decide whether the file
     * can still be accessed or if it is deleted immediately.
     *
     * @param	name	the name of the file to remove.
     * @return	<tt>true</tt> if the file was successfully removed.
     */
    public boolean remove(String name);
}