Method wait_for_all

external/basisu/encoder/basisu_enc.cpp:1576–1595

	}

	void job_pool::wait_for_all()
	{
		std::unique_lock<std::mutex> lock(m_mutex);

		// Drain the job queue on the calling thread.
		while (!m_queue.empty())
		{
			std::function<void()> job(m_queue.back());
			m_queue.pop_back();

			lock.unlock();

			job();

			lock.lock();
		}

		// The queue is empty, now wait for all active jobs to finish up.
		m_no_more_jobs.wait(lock, [this]{ return !m_num_active_jobs; } );
	}

	void job_pool::job_thread(uint32_t index)
	{