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Nullable enabled. #9

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Nullable enabled. #9

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b96b226
Nullable enabled.
iterma Jul 27, 2022
e6c249c
Merge branch 'master' into nullable
iterma Jul 28, 2022
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37 changes: 18 additions & 19 deletions WSLDiskShrinker/Common/ProcessExtension.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,25 +5,24 @@ namespace WSLDiskShrinker.Common;
// https://stackoverflow.com/questions/470256/process-waitforexit-asynchronously
static class ProcessExtension
{
/// <summary>
/// Waits asynchronously for the process to exit.
/// </summary>
/// <param name="process">The process to wait for cancellation.</param>
/// <param name="cancellationToken">A cancellation token. If invoked, the task will return
/// immediately as canceled.</param>
/// <returns>A Task representing waiting for the process to end.</returns>
public static Task CustomWaitForExitAsync(this Process process,
CancellationToken cancellationToken = default)
{
if (process.HasExited) return Task.CompletedTask;
/// <summary>
/// Waits asynchronously for the process to exit.
/// </summary>
/// <param name="process">The process to wait for cancellation.</param>
/// <param name="cancellationToken">A cancellation token. If invoked, the task will return
/// immediately as canceled.</param>
/// <returns>A Task representing waiting for the process to end.</returns>
public static Task CustomWaitForExitAsync(this Process process,
CancellationToken cancellationToken = default)
{
if (process.HasExited) return Task.CompletedTask;

var tcs = new TaskCompletionSource<object>();
process.EnableRaisingEvents = true;
process.Exited += (sender, args) => tcs.TrySetResult(null);
if (cancellationToken != default)
cancellationToken.Register(() => tcs.SetCanceled());
var tcs = new TaskCompletionSource<object>();
process.EnableRaisingEvents = true;
process.Exited += (sender, args) => tcs.TrySetResult(process.ExitCode);
if (cancellationToken != default)
cancellationToken.Register(() => tcs.SetCanceled());

return process.HasExited ? Task.CompletedTask : tcs.Task;
}
return process.HasExited ? Task.CompletedTask : tcs.Task;
}
}

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