/// <summary>
/// Creates a pool for the specified type with the specified initial capacity and allocator.
/// </summary>
/// <typeparam name="T">The type of object for which to create an expanding pool.</typeparam>
/// <param name="capacity">The pool's initial capacity.</param>
/// <param name="watermark">The pool's watermark value, if it must be created.</param>
/// <param name="allocator">The pool's instance allocator, if it must be created.</param>
public void Create <T>(Int32 capacity, Int32 watermark, Func <T> allocator = null)
{
Contract.EnsureRange(capacity >= 0, nameof(capacity));
Contract.EnsureRange(watermark >= 1, nameof(watermark));
Contract.EnsureRange(watermark >= capacity, nameof(watermark));
if (pools.ContainsKey(typeof(T)))
{
throw new InvalidOperationException(CoreStrings.PoolRegistryAlreadyContainsType.Format(typeof(T)));
}
pools[typeof(T)] = new ExpandingPool <T>(capacity, watermark, allocator);
}
/// <summary>
/// Gets the pool for the specified type. If the pool does not exist, it will be created
/// with the specified initial capacity and allocator.
/// </summary>
/// <typeparam name="T">The type of object for which to retrieve a pool.</typeparam>
/// <param name="capacity">The initial capacity of the pool, if it must be created.</param>
/// <param name="watermark">The pool's watermark value, if it must be created.</param>
/// <param name="allocator">The pool's instance allocator, if it must be created.</param>
/// <returns>The pool for the specified type.</returns>
public IPool <T> Get <T>(Int32 capacity, Int32 watermark, Func <T> allocator = null)
{
Contract.EnsureRange(capacity >= 0, nameof(capacity));
Contract.EnsureRange(watermark >= 1, nameof(watermark));
Contract.EnsureRange(watermark >= capacity, nameof(watermark));
IPool pool;
if (!pools.TryGetValue(typeof(T), out pool))
{
pool = new ExpandingPool <T>(capacity, watermark, allocator);
pools[typeof(T)] = pool;
}
return((IPool <T>)pool);
}