Latch implementation

[asipe]

Maybe this name isn't the best, but a latch mechanism that can be latched based on a policy:

• never release latch (single latch)
• release latch every X invocations
• release latch every X milliseconds

Possible api:

public interface IReleasePolicy {
  bool ShouldRelease();
}

public class Latch<T> {
  public Latch(IReleasePolicy releasePolicy, Func<T> work) {}
  public T Acquire<T>() {}
  public T Acquire<T>(long waitMillis) {}
}

• single access guaranteed to the work
• time out based acquisition of resource (blockers only or blockers and requester?)