public void TestSeveralChannelsInAPipeline()
{
Channel<uint> incoming = new Channel<uint>(5);
Channel<uint> filteredEven = new Channel<uint>(9);
Channel<uint> filteredDivisibleBy3 = new Channel<uint>(4);
Channel<ClassifiedNumber> classifiedNumbers = new Channel<ClassifiedNumber>(10);
Channel<int> quitChannel = new Channel<int>(2);
Thread feederThread = new Thread(
()=>
{
for (uint i = 0; i!=90; ++i)
{
incoming.Send(i);
}
});
Thread filterThread = new Thread(
()=>
{
bool done = false;
while (!done)
{
Channel.Select(
incoming.CaseReceive(
v =>
{
if (v%2==0)
{
filteredEven.Send(v);
}
else if (v%3==0)
{
filteredDivisibleBy3.Send(v);
}
}
),
quitChannel.CaseReceive(
v => done = true
));
}
});
Thread mergeThread = new Thread(
() =>
{
bool done = false;
while (!done)
{
Channel.Select(
filteredEven.CaseReceive(
v=>classifiedNumbers.Send(new ClassifiedNumber{Value=v, Category = "even"})),
filteredDivisibleBy3.CaseReceive(
v=>classifiedNumbers.Send(new ClassifiedNumber{Value=v, Category = "div3"})),
quitChannel.CaseReceive(
v=>done = true));
}
});
feederThread.Start();
filterThread.Start();
mergeThread.Start();
List<uint> outputEvenNumbers = new List<uint>();
List<uint> outputDivisibleBy3Numbers = new List<uint>();
for (int idx=0; idx != 60; ++idx)
{
var number = classifiedNumbers.Receive();
switch (number.Category)
{
case "even": outputEvenNumbers.Add(number.Value); break;
case "div3": outputDivisibleBy3Numbers.Add(number.Value); break;
}
}
quitChannel.Send(0);
quitChannel.Send(0);
feederThread.Join();
filterThread.Join();
mergeThread.Join();
Assert.That(
outputEvenNumbers, Is.EqualTo(new List<uint>{0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88}));
Assert.That(
outputDivisibleBy3Numbers, Is.EqualTo(new List<uint>{3,9,15,21,27,33,39,45,51,57,63,69,75,81,87}));
}
public int RunConsole()
{
int exitCode = 0;
Channel<string> commandChannel = new Channel<string>(1);
Channel<string> readyChannel = new Channel<string>(1);
Thread consoleThread = new Thread(
() =>
{
while (true)
{
string prompt = readyChannel.Receive();
if (prompt == null)
{
return;
}
Console.Write(prompt);
commandChannel.Send(Console.ReadLine());
}
}) {IsBackground = true};
consoleThread.Start();
while (Running)
{
readyChannel.Send(Prompt);
Channel.Select(
iQuitChannel.CaseReceive(aExitCode =>
{
Running = false;
exitCode = aExitCode;
}),
commandChannel.CaseReceive(aCommand =>
{
if (aCommand == null)
{
Running = false;
EndOfInput = true;
return;
}
iCommandProcessor.ProcessCommand(aCommand);
}));
}
readyChannel.Send(null);
return exitCode;
}