Function thread_pool

include/BS_thread_pool.hpp:1457–1457

* @brief Construct a new thread pool. The number of threads will be the total number of hardware threads available, as reported by the implementation. This is usually determined by the number of cores in the CPU. If a core is hyperthreaded, it will count as two threads. If the native extensions are enabled, the pool will instead use the number of threads available to the process, as obtained from

     * @brief Construct a new thread pool. The number of threads will be the total number of hardware threads available, as reported by the implementation. This is usually determined by the number of cores in the CPU. If a core is hyperthreaded, it will count as two threads. If the native extensions are enabled, the pool will instead use the number of threads available to the process, as obtained from `BS::get_os_process_affinity()`, which can be less than the number of hardware threads.
     */
    thread_pool() : thread_pool(0, [] {}) {}

    /**
     * @brief Construct a new thread pool with the specified number of threads.