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// Copyright (C) 2016 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#undef DLIB_AsYNC_ABSTRACT_Hh_
#ifdef DLIB_AsYNC_ABSTRACT_Hh_
#include "thread_pool_extension_abstract.h"
#include <future>
#include <functional>
namespace dlib
{
// ----------------------------------------------------------------------------------------
thread_pool& default_thread_pool(
);
/*!
ensures
- returns a reference to a global thread_pool. If the DLIB_NUM_THREADS
environment variable is set to an integer then the thread pool will contain
DLIB_NUM_THREADS threads, otherwise it will contain
std::thread::hardware_concurrency() threads.
!*/
// ----------------------------------------------------------------------------------------
template <
typename Function,
typename ...Args
>
std::future<typename std::result_of<Function(Args...)>::type> async(
thread_pool& tp,
Function&& f,
Args&&... args
);
/*!
requires
- f must be a function and f(args...) must be a valid expression.
ensures
- This function behaves just like std::async(std::launch::async, f, args)
except that instead of spawning a new thread to process each task it submits
the task to the provided dlib::thread_pool. Therefore, dlib::async() is
guaranteed to use a bounded number of threads unlike std::async(). This also
means that calls to dlib::async() will block if there aren't any free threads
in the thread pool.
!*/
// ----------------------------------------------------------------------------------------
template <
typename Function,
typename ...Args
>
std::future<typename std::result_of<Function(Args...)>::type> async(
Function&& f,
Args&&... args
);
/*!
ensures
- Calling this function is equivalent to directly calling async(default_thread_pool(), f, args...)
!*/
}
// ----------------------------------------------------------------------------------------
#endif // DLIB_AsYNC_ABSTRACT_Hh_
|
