/// <summary>
/// <para>
/// Initialize multithreaded .xz Stream encoder
/// </para>
/// <para>
/// This provides the functionality of lzma_easy_encoder() and
/// lzma_stream_encoder() as a single function for multithreaded use.
/// </para>
/// <para>
/// The supported actions for lzma_code() are LZMA_RUN, LZMA_FULL_FLUSH,
/// LZMA_FULL_BARRIER, and LZMA_FINISH. Support for LZMA_SYNC_FLUSH might be
/// added in the future.
/// </para>
/// </summary>
/// <param name="stream">
/// Pointer to properly prepared lzma_stream
/// </param>
/// <param name="mt">
/// Pointer to multithreaded compression options
/// </param>
/// <returns>
/// A <see cref="LzmaResult"/> value which indicates success or failure.
/// </returns>
public static LzmaResult lzma_stream_encoder_mt(ref LzmaStream stream, ref LzmaMT mt)
{
if (SupportsMultiThreading)
{
return(lzma_stream_encoder_mt_ptr(ref stream, ref mt));
}
else
{
throw new PlatformNotSupportedException("lzma_stream_encoder_mt is not supported on this platform. Check SupportsMultiThreading to see whether you can use this functionality.");
}
}
public XZOutputStream(Stream s, int threads, uint preset, bool leaveOpen)
{
this.innerStream = s;
this.leaveOpen = leaveOpen;
LzmaResult ret;
if (threads == 1 || !NativeMethods.SupportsMultiThreading)
{
ret = NativeMethods.lzma_easy_encoder(ref this.lzmaStream, preset, LzmaCheck.Crc64);
}
else
{
if (threads <= 0)
{
throw new ArgumentOutOfRangeException(nameof(threads));
}
if (threads > Environment.ProcessorCount)
{
Trace.TraceWarning("{0} threads required, but only {1} processors available", threads, Environment.ProcessorCount);
threads = Environment.ProcessorCount;
}
var mt = new LzmaMT()
{
preset = preset,
check = LzmaCheck.Crc64,
threads = (uint)threads
};
ret = NativeMethods.lzma_stream_encoder_mt(ref this.lzmaStream, ref mt);
}
if (ret == LzmaResult.OK)
{
this.outbuf = new byte[BufSize];
this.lzmaStream.AvailOut = BufSize;
return;
}
GC.SuppressFinalize(this);
throw GetError(ret);
}
internal static extern LzmaResult lzma_stream_encoder_mt(ref LzmaStream stream, ref LzmaMT mt);
