/// <summary>
/// Attaches a <see cref="Condition" /> to the <see cref="WaitSet" />.
/// </summary>
/// <remarks>
/// <para>It is possible to attach a <see cref="Condition" /> on a <see cref="WaitSet" /> that is currently being waited upon (via the wait operation). In this case, if the
/// <see cref="Condition" /> has a <see cref="Condition.TriggerValue" /> of <see langword="true"/>, then attaching the condition will unblock the <see cref="WaitSet" />.</para>
/// <para>Adding a <see cref="Condition" /> that is already attached to the <see cref="WaitSet" /> has no effect.</para>
/// </remarks>
/// <param name="cond">The <see cref="Condition" /> to be attached.</param>
/// <returns>The <see cref="ReturnCode" /> that indicates the operation result.</returns>
public ReturnCode AttachCondition(Condition cond)
{
if (cond == null)
{
return(ReturnCode.BadParameter);
}
ReturnCode ret = UnsafeNativeMethods.AttachCondition(_native, cond.ToNative());
if (ret == ReturnCode.Ok)
{
_conditions.AddOrUpdate(cond.ToNative(), cond, (p, t) => cond);
}
return(ret);
}
