public IDisposable StartPrecacheThread()
{
PrecacheThread newThread = null;
try
{
newThread = new PrecacheThread(this);
var oldPrecache = Interlocked.CompareExchange(ref precache_, newThread, NullPrecache.Instance);
if (!ReferenceEquals(oldPrecache, NullPrecache.Instance))
{
throw new InvalidOperationException("Precache thread is aleady running.");
}
return(newThread);
}
catch (Exception ex)
{
try
{
newThread?.Dispose();
}
catch (Exception cleanupEx)
{
throw new AggregateException(ex, cleanupEx);
}
throw;
}
}
private void OnPrecacheThreadStop(PrecacheThread thread) => Interlocked.CompareExchange(ref precache_, NullPrecache.Instance, thread);
