thread_pool_singleton.hpp

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#pragma once
 
#include <future>
#include <type_traits>
 
#include <cpp-toolbox/cpp-toolbox_export.hpp>
#include <cpp-toolbox/macro.hpp>
 
#include "cpp-toolbox/base/thread_pool.hpp"
 
namespace toolbox::base
{
 
class CPP_TOOLBOX_EXPORT thread_pool_singleton_t
{
public:
  static thread_pool_singleton_t& instance()
  {
    static thread_pool_singleton_t inst;
    return inst;
  }
 
  template<class F, class... Args>
  auto submit(F&& f, Args&&... args)
      -> std::future<typename std::invoke_result_t<F, Args...>>
  {
    return pool_.submit(std::forward<F>(f), std::forward<Args>(args)...);
  }
 
  size_t get_thread_count() const { return pool_.get_thread_count(); }
 
private:
  thread_pool_singleton_t() = default;
  ~thread_pool_singleton_t() = default;
 
  CPP_TOOLBOX_DISABLE_COPY(thread_pool_singleton_t)
  CPP_TOOLBOX_DISABLE_MOVE(thread_pool_singleton_t)
 
  thread_pool_t pool_{};
};
 
}  // namespace toolbox::base