[Bug 57399] New: [wine-mono] ReadTimeout of SerialPort not working properly

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57399

Bug ID: 57399
           Summary: [wine-mono] ReadTimeout of SerialPort not working
                    properly
           Product: Wine
           Version: 9.20
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: serial
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

The following code set ReadTimeout to 500ms, and call the function Read.
When COM33 receives nothing, it should throw TimeoutException after timeout.

But wine stuck on the Read operation, until it received 4096 (or more) bytes.

```
using System.IO.Ports;

namespace ConsoleApplication1
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            var serialPort = new SerialPort("COM33", 9600, Parity.None, 8,
StopBits.One);
            serialPort.ReadTimeout = 500;
            serialPort.WriteTimeout = 500;
            serialPort.Open();
            var buff = new byte[4096];
            serialPort.Read(buff, 0, 4096);
        }
    }
}
```

[Bug 57399] [wine-mono] ReadTimeout of SerialPort not working properly

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57399

--- Comment #1 from [e-mail] ---
btw, my COM33 links to /dev/ttyUSB0, which is a CH340 USB serial converter.
Also, the SerialPort is from wine-mono, I compile the code with mono, target
4.0.

Actually, I found wine bug #52340, which shows SerialPort implement uses
corefx:
https://github.com/madewokherd/mono/pull/22. FYI, revert the commit will not
help.

[Bug 57399] [wine-mono] ReadTimeout of SerialPort not working properly

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57399

--- Comment #3 from [e-mail] ---
I compile the program on Windows, with .NET 8.0 and System.IO.Ports from NuGet
(https://www.nuget.org/packages/system.io.ports), then install
dotnet-runtime-8.0.10-win-x64.exe with a clean wine to run the program.

Unluckily, it still waiting for serial port input infinity,  
no TimeoutException throws after 500ms.