public void DirectoryShoudBeDeleted()
{
var partition = new PartitionInfo {DeviceId = "D:"};
var type = BenchmarkType.Read;
var size = 0x100;
BenchmarkFile.OpenFileStream(partition, type, size, _ => { });
bool isExit = Directory.Exists(path);
Assert.IsFalse(isExit);
}
public static void OpenFileStream(PartitionInfo partition, BenchmarkType benchmarkType, int bufferSize, Action<FileStream> work)
{
OpenFileHandle(partition, benchmarkType,
handle =>
{
//打开文件流
using (FileStream stream = new FileStream(handle, FileAccess.Read, bufferSize, false))
{
work(stream);
}
});
}
public void ReadShoudBeRead()
{
var partition = new PartitionInfo {DeviceId = "D:"};
var type = BenchmarkType.Read;
var size = 0x100;
BenchmarkFile.OpenFileStream(partition, type, size,
stream =>
{
Assert.IsTrue(stream.CanRead);
Assert.IsFalse(stream.CanWrite);
});
}
public override IOSpeed GetTestResult(PartitionInfo partition, BenchmarkType type, BenchmarkFlags flags, CancellationToken cancellationToken)
{
var randomBenchmarkTimes = new TimeSpan[this.outstandingThreadsCount];
BenchmarkFile.OpenFileHandle(partition, type,
handle =>
{
Parallel.For(0, this.outstandingThreadsCount, i =>
{
using (FileStream stream = new FileStream(handle, FileAccess.Read, BlockSize))
{
Action<byte[], int, int> work = Utility.GetReadOrWriteAction(type, stream);
randomBenchmarkTimes[i] = DoBenchmarkAlgorithm(stream, work, flags, cancellationToken);
}
});
});
var totalTimes = randomBenchmarkTimes.Aggregate((a, b) => a + b);
return new IOSpeed(time: totalTimes, ioCount: BlockCount, bytes: BlockCount * BlockSize);
}
public static void OpenFileHandle(PartitionInfo partition, BenchmarkType benchmarkType, Action<SafeFileHandle> work)
{
FileAccess fileAccess = (benchmarkType.HasFlag(BenchmarkType.Read) ? FileAccess.Read : new FileAccess()) | (benchmarkType.HasFlag(BenchmarkType.Write) ? FileAccess.Write : new FileAccess());
string fullWorkDirectory = partition.DeviceId + workDirectory;
string fileDirectory = $@"{fullWorkDirectory}\{fileName}";
DeleteDirectory(fullWorkDirectory); // 如果有，删除目录
Directory.CreateDirectory(fullWorkDirectory); // 创建测试目录
DecompressFolder(fullWorkDirectory); // 将测试目录的压缩选项取消
//打开文件句柄
using (SafeFileHandle handle = NativeMethods.CreateFile(fileDirectory, fileAccess, FileShare.None, IntPtr.Zero, FileMode.OpenOrCreate, FileFlags, IntPtr.Zero))
{
int errorcode = Marshal.GetLastWin32Error();
if (handle.IsInvalid)
{
//TODO: 本地化
throw new IOException($"测试临时文件创建失败。错误：{errorcode}", new Win32Exception(errorcode));
}
work(handle);
}
DeleteDirectory(fullWorkDirectory);
}
/// <summary>
/// 将表示 Win32_LogicalDisk 的 WMI 对象转换为 PartitionInfo 对象。
/// </summary>
/// <param name="logicalDiskObject">表示 Win32_LogicalDisk 的 WMI 对象。</param>
/// <returns>转换后的 PartitionInfo 对象。</returns>
public static PartitionInfo CreatePartitionInfoFromLogicalDiskObject(ManagementObject logicalDiskObject)
{
PartitionInfo partition = new PartitionInfo();
partition.Capacity = (long)(ulong)logicalDiskObject["Size"]; // 分区大小
partition.FreeSpace = (long)(ulong)logicalDiskObject["FreeSpace"]; // 剩余空间
partition.PartitionType = (int)(uint)logicalDiskObject["DriveType"]; // 磁盘类型
partition.FileSystem = (string)logicalDiskObject["FileSystem"]; // 文件系统
partition.DeviceId = (string)logicalDiskObject["DeviceID"]; // 盘符
partition.VolumeName = (string)logicalDiskObject["VolumeName"]; // 卷标
partition.SerialNumber = ((string)logicalDiskObject["VolumeSerialNumber"]).Trim(); // 分区序列号，头尾去除空格
// 获取卷对象用于获取分区的区块大小。
ManagementObject volumeObject = Utility.GetVolumeObjectByDeviceId(partition.DeviceId);
// 如果获取到了就设置，如果没有获取到就设为 -1。
if (volumeObject != null)
{
partition.BlockSize = (long)(ulong)volumeObject["BlockSize"]; // 分区的区块大小。
}
else
{
partition.BlockSize = -1;
}
ManagementObject diskPartitionObject = Utility.GetDiskPartitionObjectByDeviceId(partition.DeviceId);
if (diskPartitionObject != null) // 此处同上。
{
partition.Index = (int)(uint)diskPartitionObject["Index"]; // 分区的索引。
partition.StartingOffset = (long)(ulong)diskPartitionObject["StartingOffset"]; // 分区起始偏移。
}
else
{
partition.StartingOffset = partition.Index = -1; // 如果无法获取，就设置其为 -1。
}
return partition;
}
/// <summary>
/// 根据核心测试算法返回的时间计算结果。
/// </summary>
/// <param name="partition">测试分区</param>
/// <param name="arg">测试类型</param>
/// <param name="flags">测试所需参数</param>
/// <param name="cancellationToken">用以取消工作的取消标记</param>
/// <returns></returns>
public virtual IOSpeed GetTestResult(PartitionInfo partition, BenchmarkType type, BenchmarkFlags flags, CancellationToken cancellationToken)
{
TimeSpan result = new TimeSpan();
BenchmarkFile.OpenFileStream(partition, type, BlockSize,
stream =>
{
Action<byte[], int, int> work = GetReadOrWriteAction(type, stream);
result = DoBenchmarkAlgorithm(stream, work, flags, cancellationToken);
});
return new IOSpeed(time: result, ioCount: BlockCount, bytes: BlockCount * BlockSize);
}