#include <functional>
#include <mutex>
#include <thread>
#include <vector>

namespace qb
{

  using task = std::function<void(void)>;

  struct taskpool {
    static taskpool& get();

    // submit a task that is executed once on a separate thread
    void submit_async(const task &t);

    // submit a task that is executed at the end of the current frame, in the
    // main thread.
    void submit_frame(const task &t);

    // execute all frame tasks (only should be called from the main thread)
    void frame();

  private:
    std::vector<task> _frametasks;
    std::mutex _locktasks;
  };

}