observe_pool.h File Reference

Top-level user-facing pool for content-based interning of immutable objects. More...

#include <concepts>
#include <cstdint>
#include <utility>
#include "jh/concurrent/pointer_pool.h"
#include "jh/conceptual/hashable.h"

Go to the source code of this file.

Classes
struct	jh::weak_ptr_hash< T >
	Content-based hash functor for std::weak_ptr<T>. More...
struct	jh::weak_ptr_eq< T >
	Equality functor for std::weak_ptr<T>. More...

Typedefs
template<typename T>
using	jh::observe_pool
	Duck-typed alias of jh::conc::pointer_pool for content-based pooling of immutable objects.

Detailed Description

Top-level user-facing pool for content-based interning of immutable objects.

Copyright

Copyright 2025 JeongHan-Bae <mastropseudo@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Full license: GitHub

Author

JeongHan-Bae <mastropseudo@gmail.com>

jh::observe_pool<T> is a duck-typed, user-oriented pooling facility built on top of jh::conc::pointer_pool. It provides content-based deduplication for immutable or structurally immutable objects, without requiring explicit hash or equality policy specification.

The pool observes object lifetimes via std::weak_ptr and never owns pooled objects. Logical identity is defined by T's hashing semantics and operator==.

observe_pool is defined as a direct alias of jh::conc::pointer_pool with automatically selected jh::weak_ptr_hash<T> and jh::weak_ptr_eq<T>. Instantiation is valid only when the underlying type requirements are satisfied.

As a user-facing pool under the jh namespace, it is available via:

• <jh/pool>
• <jh/concurrency>

Version

1.4.x

Date

2025