public T GetResult()
{
if (_work == null || _work.ID != _id)
{
throw new InvalidOperationException("The result of a Task<T> can only be retrieved once.");
}
_task.Wait();
var result = _work.Result;
_work.Recycle();
_work = null;
return(result);
}
/// <summary>
/// Creates and starts a task which executes the given function and stores the result for later
/// retrieval.
/// </summary>
/// <typeparam name="T">The type of result the function returns.</typeparam>
/// <param name="function">The function to execute in parallel.</param>
/// <param name="options">The work options to use with this action.</param>
/// <param name="completionCallback">
/// A method which will be called in <see cref="RunCallbacks"/> once this task has completed.
/// </param>
/// <returns>A <see cref="Task{T}"/> which stores the result of the function.</returns>
/// <remarks>
/// <strong>Important:</strong> The completion callback is not executed automatically. Instead,
/// the callback is only executed when <see cref="RunCallbacks"/> is called. See
/// <see cref="RunCallbacks"/> for additional information.
/// </remarks>
/// <exception cref="ArgumentNullException">
/// <paramref name="function"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentException">
/// Invalid number of maximum threads set in <see cref="IWork.Options"/>.
/// </exception>
public static Task <T> Start <T>(Func <T> function, WorkOptions options, Action completionCallback)
{
#if !UNITY
if (options.MaximumThreads < 1)
{
throw new ArgumentException("options.MaximumThreads cannot be less than 1.", "options");
}
var work = FutureWork <T> .Create();
work.Function = function;
work.Options = options;
var task = Start(work, completionCallback);
return(new Task <T>(task, work));
#else
throw new NotSupportedException("Unity builds do not yet support multithreading.");
#endif
}
internal Task(Task task, FutureWork <T> work)
{
_task = task;
_work = work;
_id = work.ID;
}