Introduction
Class view
Performance comparison
Compiler
How to compile
Compilation errors?
Tutorial
Future work

This is a pure (which means it doesn't depend on any platform) and exception-safety C++ threadpool (so far, there is no standard threadpool in C++).
The goal of this project is to provide a fastest, beautiful and easy-to-use C++ threadpool library.

Two classes

CThreadPool, including the member function
	thread_id    add(Func &&,Args &&...)
	void         add_and_detach(Func &&,Args &&...)
	size_type    empty() const noexcept
	void         join(thread_id)
	void         join_all()
	bool         joinable(thread_id) const
	size_type    size() const noexcept
	void         wait_until_all_usable() const
	
CThreadPool_Ret, including the member function
	thread_id    add(Func &&,Args &&...)
	size_type    empty() const noexcept
	Ret          get(thread_id)
	size_type    size() const noexcept
	bool         valid(thread_id) const
	void         wait(thread_id) const
	void         wait_all() const

Use the CThreadPool_Ret when you want to get the return value of function.
Use the CThreadPool when you don't care the return value of function.
CThreadPool::add_and_detach is faster (very) than CThreadPool_Ret::add.

progschj/ThreadPool, see Comparison.
Tyler-Hardin/thread_pool, see Comparison.
P.S. bilash/threadpool, I don't want to test a C-like code.
P.S. nbsdx/ThreadPool cannot pass testing, see README.
P.S. philipphenkel/threadpool cannot pass testing, see README.
P.S. tghosgor/threadpool11 cannot pass testing, see README.
See the directory for more details.

VC++ 14.2
or any compiler which supports C++14

You have to download my lib first.
The directory should be look like

├── lib
│   ├── header
│   ├── LICENSE
│   ├── README.md
│   ├── src
│   └── tutorial
└── ThreadPool
    ├── comparison
    ├── header
    ├── LICENSE
    ├── README.md
    ├── src
    └── tutorial

Don't forget to compile lib/src/CScopeGuard.cpp.

Q: My compiler doesn't support C++14
A: Get a newer compiler version, such as GCC 5.3.0 or VC++ 14.2 (inside Visual Studio Community 2015 Update 2)

Q: Other problems
A: See How to compile or email me

I provide example.cpp and example_ret.cpp to help you understand how to use this powerful thread pool
To use example.cpp:
g++ -std=c++14 tutorial/example.cpp src/* ../lib/src/CScopeGuard.cpp
To use example_ret.cpp:
g++ -std=c++14 tutorial/example_ret.cpp src/IThreadPoolItemBase.cpp ../lib/src/CScopeGuard.cpp

replace std::bind in CThreadPool::add, CThreadPool::add_and_detach and CThreadPool_Ret::add with C++17 std::apply
work stealing