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Refactored deadlock fix

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This commit is contained in:
Darth Affe 2021-11-03 23:31:57 +01:00
parent 34940632a3
commit b007471ed6
1 changed files with 10 additions and 13 deletions
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23
OBD.NET/OBD.NET.Common/Devices/SerialDevice.cs
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@ -197,6 +197,8 @@ namespace OBD.NET.Common.Devices
/// </summary>
private async void CommandWorker()
{
CancellationToken cancellationToken = _commandCancellationToken.Token;
while (!_commandCancellationToken.IsCancellationRequested)
{
CurrentCommand = null;
@ -206,7 +208,7 @@ namespace OBD.NET.Common.Devices
try
{
if (_commandQueue.TryTake(out CurrentCommand, 10, _commandCancellationToken.Token))
if (_commandQueue.TryTake(out CurrentCommand, 10, cancellationToken))
{
_queueSize--;
@ -217,24 +219,19 @@ namespace OBD.NET.Common.Devices
else
Connection.Write(Encoding.ASCII.GetBytes(CurrentCommand.CommandText));
//wait for command to finish or command canceled
while (!(_commandFinishedEvent.WaitOne(50) || _commandCancellationToken.IsCancellationRequested))
{
}
// wait for command to finish or command canceled
while (!_commandFinishedEvent.WaitOne(50))
cancellationToken.ThrowIfCancellationRequested();
}
}
catch (OperationCanceledException) { /*ignore, because it is thrown when the cancellation token is canceled*/}
// if canceled set all commands as completed (with null result)
if (_commandCancellationToken.IsCancellationRequested)
catch (OperationCanceledException)
{
CurrentCommand?.CommandResult.WaitHandle.Set();
foreach (var cmd in _commandQueue)
{
cmd.CommandResult.WaitHandle.Set();
}
}
}
foreach (QueuedCommand cmd in _commandQueue)
cmd.CommandResult.WaitHandle.Set();
}
public void WaitQueue() => _queueEmptyEvent.WaitOne();