private void read_file_seq(string path, BackgroundWorker worker)
{
byte[] buffer = new byte[1024 * 1024 * 16]; //16M
SafeFileHandle handle = WinApiFunctions.CreateFile(path, FileAccess.Read, FileShare.None, IntPtr.Zero, FileMode.Open, this._fileFlags, IntPtr.Zero);
if (handle.IsInvalid)
{
throw new IOException("Could not open file stream.", new Win32Exception());
}
//缓冲区大小64M
FileStream stream = new FileStream(handle, FileAccess.Read, 1024 * 1024 * 64, false);
for (long i = 0L; i < Testsize; i += 1L)
{
stream.Read(buffer, 0, buffer.Length);
}
stream.Close();
}
private void write_file_seq(string path, BackgroundWorker worker)
{
new FileInfo(path).Delete();
SafeFileHandle handle = WinApiFunctions.CreateFile(path, FileAccess.ReadWrite, FileShare.None, IntPtr.Zero, FileMode.CreateNew, this._fileFlags, IntPtr.Zero);
if (handle.IsInvalid)
{
throw new IOException("Could not open file stream.", new Win32Exception());
}
//FileStream 缓冲区大小1024*1024*16 16M
FileStream stream = new FileStream(handle, FileAccess.ReadWrite, 1024 * 1024 * 16, false);
for (long i = 0L; i < Testsize; i += 1L)
{
stream.Write(this.rnd_array, 0, rnd_array.Length);
}
stream.Flush();
stream.Close();
}
