public static WaitAsyncOperation Start(WaitHandle waitHandle, TimeSpan timeout, CancellationToken cancellationToken)
{
var value = new WaitAsyncOperation();
value.StartImpl(waitHandle, timeout, cancellationToken);
return(value);
}
public Task <bool> WaitForExitAsync(TimeSpan timeout, CancellationToken cancellationToken = default)
{
ValidateTimeoutRange(timeout);
CheckNotDisposed();
var state = _stateHolder.State;
if (state.HasExitCode)
{
return(CompletedBoolTask.True);
}
// Synchronous path: the process has already exited.
var waitHandle = _stateHolder.State.ExitedWaitHandle;
if (waitHandle.WaitOne(0))
{
state.DangerousRetrieveExitCode();
return(CompletedBoolTask.True);
}
// Synchronous path: already canceled.
if (cancellationToken.IsCancellationRequested)
{
return(Task.FromCanceled <bool>(cancellationToken));
}
// Start an asynchronous wait operation.
var operation = WaitAsyncOperation.Start(waitHandle, timeout, cancellationToken);
return(operation.Completion);
}
