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ThreadSafety.cs
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ThreadSafety.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using Xunit;
public class ThreadSafety
{
const int NumberOfIterations = 100;
[Fact]
[SkipOnPlatform(TestPlatforms.Browser | TestPlatforms.iOS | TestPlatforms.MacCatalyst | TestPlatforms.tvOS, "Not supported on Browser, iOS, MacCatalyst, or tvOS.")]
public static void OpenStandardXXXCanBeCalledConcurrently()
{
Parallel.For(0, NumberOfIterations, i =>
{
using (Stream s = Console.OpenStandardInput())
{
Assert.NotNull(s);
}
});
Parallel.For(0, NumberOfIterations, i =>
{
using (Stream s = Console.OpenStandardOutput())
{
Assert.NotNull(s);
}
});
Parallel.For(0, NumberOfIterations, i =>
{
using (Stream s = Console.OpenStandardError())
{
Assert.NotNull(s);
}
});
}
[Fact]
[SkipOnPlatform(TestPlatforms.Browser | TestPlatforms.iOS | TestPlatforms.MacCatalyst | TestPlatforms.tvOS, "Not supported on Browser, iOS, MacCatalyst, or tvOS.")]
public static void SetStandardXXXCanBeCalledConcurrently()
{
TextReader savedStandardInput = Console.In;
TextWriter savedStandardOutput = Console.Out;
TextWriter savedStandardError = Console.Error;
try
{
using (MemoryStream memStream = new MemoryStream())
{
using (StreamReader sr = new StreamReader(memStream))
{
using (StreamWriter sw = new StreamWriter(memStream))
{
Parallel.For(0, NumberOfIterations, i =>
{
Console.SetIn(sr);
});
Parallel.For(0, NumberOfIterations, i =>
{
Console.SetOut(sw);
});
Parallel.For(0, NumberOfIterations, i =>
{
Console.SetOut(sw);
});
}
}
}
}
finally
{
Console.SetIn(savedStandardInput);
Console.SetOut(savedStandardOutput);
Console.SetError(savedStandardError);
}
}
[Fact]
[SkipOnPlatform(TestPlatforms.Browser | TestPlatforms.iOS | TestPlatforms.MacCatalyst | TestPlatforms.tvOS, "Not supported on Browser, iOS, MacCatalyst, or tvOS.")]
public static void ReadMayBeCalledConcurrently()
{
const char TestChar = '+';
TextReader savedStandardInput = Console.In;
try
{
using (MemoryStream memStream = new MemoryStream())
{
using (StreamWriter sw = new StreamWriter(memStream))
{
for (int i = 0; i < NumberOfIterations; i++)
{
sw.Write(TestChar);
}
sw.Flush();
memStream.Seek(0, SeekOrigin.Begin);
using (StreamReader sr = new StreamReader(memStream))
{
Console.SetIn(sr);
Parallel.For(0, NumberOfIterations, i =>
{
Assert.Equal(TestChar, Console.Read());
});
// We should be at EOF now.
Assert.Equal(-1, Console.Read());
}
}
}
}
finally
{
Console.SetIn(savedStandardInput);
}
}
}