static async Task MemoryMappedDecode()
{
const string path = "t8.shakespeare.txt";
Console.WriteLine();
var fi = new FileInfo(path);
if (!fi.Exists)
{
Console.WriteLine($"Input file not found: {path}");
return;
}
const int REPEAT = 10;
var enc = Encoding.ASCII;
Console.WriteLine($"Reading: {fi.Name}, {fi.Length} bytes, encoding: {enc.EncodingName}");
Console.WriteLine();
Console.WriteLine("Using PipeTextReader/MemoryMappedPipeReader (no buffer)");
for (int i = 0; i < REPEAT; i++)
{
var mmap = MemoryMappedPipeReader.Create(path);
using (mmap as IDisposable)
using (var reader = PipeTextReader.Create(mmap, enc, bufferSize: 0))
{
var watch = Stopwatch.StartNew();
var s = await TestReaderTests.MeasureAndTime(reader);
watch.Stop();
Console.WriteLine($"{s}; time taken: {watch.ElapsedMilliseconds}ms");
}
}
Console.WriteLine();
Console.WriteLine("Using PipeTextReader/MemoryMappedPipeReader (leased buffer)");
for (int i = 0; i < REPEAT; i++)
{
var mmap = MemoryMappedPipeReader.Create(path);
using (mmap as IDisposable)
using (var reader = PipeTextReader.Create(mmap, enc))
{
var watch = Stopwatch.StartNew();
var s = await TestReaderTests.MeasureAndTime(reader);
watch.Stop();
Console.WriteLine($"{s}; time taken: {watch.ElapsedMilliseconds}ms");
}
}
Console.WriteLine();
Console.WriteLine("Using StreamReader/FileStream");
for (int i = 0; i < REPEAT; i++)
{
using (var reader = new StreamReader(path, enc))
{
var watch = Stopwatch.StartNew();
var s = await TestReaderTests.MeasureAndTime(reader);
watch.Stop();
Console.WriteLine($"{s}; time taken: {watch.ElapsedMilliseconds}ms");
}
}
}
public async ValueTask <int> TestMemoryMappedPipe()
{
int x = 0;
for (int i = 0; i < LoopCount; i++)
{
var mmap = MemoryMappedPipeReader.Create(path);
using (mmap as IDisposable)
using (var reader = PipeTextReader.Create(mmap, encoding))
{
x += (await TestReaderTests.MeasureAndTime(reader)).Length;
}
}
return(x);
}
public async Task Basic_Pipelines_Text_PingPong()
{
Log.DebugLog();
var tuple = CreateConnectedSocketPair();
using (var client = tuple.Item1)
using (var server = tuple.Item2)
{
var clientPipe = SocketConnection.Create(client, InlineReceive, InlineSend, name: "socket client");
var serverPipe = SocketConnection.Create(server, InlineReceive, InlineSend, name: "socket server");
var enc = Encoding.UTF8;
await PingPong(
PipeTextReader.Create(clientPipe.Input, enc),
PipeTextWriter.Create(clientPipe.Output, enc),
PipeTextReader.Create(serverPipe.Input, enc),
PipeTextWriter.Create(serverPipe.Output, enc),
LoopCount);
}
Log.DebugLog("All good!");
}
async static Task <string> ReadLine(PipeReader reader)
{
var sb = new StringBuilder();
string result = null;
while (result == null)
{
var inp = await reader.ReadAsync();
var buffer = inp.Buffer;
var split = buffer.PositionOf((byte)'\n');
SequencePosition consumed = buffer.Start;
if (split != null)
{
var contents = buffer.Slice(0, split.Value);
result = PipeTextReader.ReadString(contents, Encoding.UTF8);
consumed = buffer.GetPosition(1, split.Value);
}
reader.AdvanceTo(consumed);
}
return(result);
}
