Device子类

以下子类定义了 Device 实例的具体类型。

类定义

    public static class PrivateMemoryDevice extends Device
    {
        public PrivateMemoryDevice(Kind kind, long size) 
        {
            super(kind);
            this.size = size;
        }
        long  size;
        long  allocatedMemory;
    };
     
    public static class SharedMemoryDevice extends Device
    {
        public SharedMemoryDevice(Kind kind, String name, long hint, long size) 
        {
            super(kind);
            this.name = name;
            this.hint = hint;
            this.size = size;
        }
         
        String name;
        long   hint;
        long   size;
    };
     
    public static class FileDevice extends Device
    {
        public FileDevice(Kind kind, String path) 
        {
            super(kind);
            this.path = path;
        }
         
        public String path;
    };
     
    public static class MultiFileDevice extends FileDevice
    {
        public MultiFileDevice(Kind kind, String path, long size) 
        {
            super(kind, path);
            this.size = size;
        }
         
        long   size;
    };
     
    public static class RaidDevice extends FileDevice
    {
        public RaidDevice(Kind kind, String path, int raidLevel) 
        {
            super(kind, path);
            this.raidLevel = raidLevel;
        }
         
        int raidLevel;
    };

   

定义说明

size

内存块的大小（以字节为单位），或 MultiFileDevice 的多文件段大小（最后一个段忽略此参数）

allocatedMemory

PrivateMemoryDevice 分配的内存的指针

hint

SharedMemoryDevice 建议的区域地址

path

FileDevice 的文件路径

raidLevel

RaidDevice 的 RAID 级别：0 - RAID-0（条带化）或 1 - RAID-1（镜像）