internal static DiskGeometry GetGeometry(SafeFileHandle handle)
{
if (handle.IsInvalid)
{
throw new Win32Exception(6);
}
var bufPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(DiskGeometry)));
try {
using (var deviceIoOverlapped = new DeviceIoOverlapped(new ManualResetEvent(false).SafeWaitHandle.DangerousGetHandle())) {
int retSize;
if (!DeviceIoControl(handle, (int)IOCTL.DiskGetGeometry, IntPtr.Zero, 0, bufPtr, Marshal.SizeOf(typeof(DiskGeometry)), out retSize, deviceIoOverlapped.GlobalOverlapped))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
return((DiskGeometry)Marshal.PtrToStructure(bufPtr, typeof(DiskGeometry)));
}
}
finally {
Marshal.FreeHGlobal(bufPtr);
}
}
public static extern bool GetOverlappedResult(
SafeFileHandle hFile, // ファイル、パイプ、通信デバイスのハンドル
DeviceIoOverlapped lpOverlapped, // オーバーラップ構造体
out ushort lpNumberOfBytesTransferred, // 転送されたバイト数
bool bWait // 待機オプション
);
internal static DiskGeometry GetGeometry(SafeFileHandle handle)
{
if(handle.IsInvalid)
throw new Win32Exception(6);
var bufPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(DiskGeometry)));
try {
using(var deviceIoOverlapped = new DeviceIoOverlapped(new ManualResetEvent(false).SafeWaitHandle.DangerousGetHandle())) {
int retSize;
if (!DeviceIoControl(handle, (int)IOCTL.DiskGetGeometry, IntPtr.Zero, 0, bufPtr, Marshal.SizeOf(typeof(DiskGeometry)), out retSize, deviceIoOverlapped.GlobalOverlapped))
throw new Win32Exception(Marshal.GetLastWin32Error());
return (DiskGeometry) Marshal.PtrToStructure(bufPtr, typeof(DiskGeometry));
}
}
finally {
Marshal.FreeHGlobal(bufPtr);
}
}
