コード例 #1
0
 /// <summary>
 /// Detaches the specified <see cref="IIndexUser"/> from the current <see cref="IndexGenerator"/>.
 /// This means that new indices, generated with <see cref="Next"/>, will not be verified anymore
 /// from <paramref name="indexUser"/> and may thereby be simultaneously used by the detached object.
 /// </summary>
 /// <param name="indexUser">The <see cref="IIndexUser"/> to detach.</param>
 /// <returns>
 /// True if the specified <see cref="IIndexUser"/> was successfully detached from the <see cref="IndexGenerator"/>; otherwise, false.
 /// This method also returns false if the <paramref name="indexUser"/> is not found to be registered with the current <see cref="IndexGenerator"/>.
 /// </returns>
 public bool Detach(IIndexUser indexUser)
 {
   using (_usersLock.EnterDisposableWriteLock())
     return _users.Remove(indexUser);
 }
コード例 #2
0
 /// <summary>
 /// Validates the specified <see cref="IIndexUser"/>.
 /// The <paramref name="user"/> is added to <see cref="_users"/>
 /// if the user isn't known by the current <see cref="IndexGenerator"/>.
 /// </summary>
 /// <param name="user"></param>
 private void RegisterUser(IIndexUser user)
 {
   using (_usersLock.EnterDisposableUpgradeableReadLock())
     if (!_users.Contains(user))
       using (_usersLock.EnterDisposableWriteLock())
         _users.Add(user);
 }
コード例 #3
0
 /// <summary>
 /// Returns the first free index.
 /// </summary>
 /// <param name="indexRequester">The object requesting the new key, usually the object invoking this method.</param>
 /// <returns></returns>
 public uint Next(IIndexUser indexRequester)
 {
   RegisterUser(indexRequester);
   lock (_indicesLock)
   {
     while (_freeIndices.Count != 0)
     {
       var freeIndex = _freeIndices[_freeIndices.Count - 1];
       _freeIndices.RemoveAt(_freeIndices.Count - 1);
       if (!IsInUse(freeIndex))
         return freeIndex;
     }
     // ELSE: find a new index.
     do
     {
       _currentIndex++;
     } while (IsInUse(_currentIndex));
     return _currentIndex;
   }
 }