/// <summary>
/// Creates a <see cref="Task"/> using the <c>Task.FromResult</c> method, but caches the result for the next call.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>Task<T>.</returns>
public static Task <T> FromResult(T value)
{
lock (_fromResultCache)
{
if (!_fromResultCache.TryGetValue(value, out var task))
{
task = TaskShim.FromResult(value);
_fromResultCache[value] = task;
}
return(task);
}
}
/// <summary>
/// Creates a <see cref="Task"/> using the <c>Task.FromResult</c> method, but caches the result for the next call.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>Task<T>.</returns>
public static Task <T> FromResult(T value)
{
Task <T> task;
if (!_fromResultCache.ContainsKey(value))
{
task = TaskShim.FromResult(value);
_fromResultCache[value] = task;
}
else
{
task = _fromResultCache[value];
}
return(task);
}
/// <summary>
/// Creates a new async-compatible mutual exclusion lock using the specified wait queue.
/// </summary>
/// <param name="queue">The wait queue used to manage waiters.</param>
public AsyncLock(IAsyncWaitQueue <IDisposable> queue)
{
_queue = queue;
_cachedKeyTask = TaskShim.FromResult <IDisposable>(new Key(this));
_mutex = new object();
}