coco
49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
// Copyright (C) 2016 Davis E. King (davis@dlib.net)
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// License: Boost Software License See LICENSE.txt for the full license.
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#ifndef DLIB_AsYNC_CPP_
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#define DLIB_AsYNC_CPP_
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// C++11 things don't work in old versions of visual studio
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#if !defined( _MSC_VER) || _MSC_VER >= 1900
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#include "async.h"
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#include <stdlib.h>
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#include "../string.h"
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#include <thread>
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namespace dlib
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{
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// ----------------------------------------------------------------------------------------
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namespace impl
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{
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unsigned long default_num_threads()
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{
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try
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{
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char* nt = getenv("DLIB_NUM_THREADS");
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if (nt)
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return string_cast<unsigned long>(nt);
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} catch(string_cast_error&) {}
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return std::thread::hardware_concurrency();
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}
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}
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// ----------------------------------------------------------------------------------------
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thread_pool& default_thread_pool()
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{
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static thread_pool tp(impl::default_num_threads());
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return tp;
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}
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}
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// ----------------------------------------------------------------------------------------
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#endif
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#endif // DLIB_AsYNC_CPP_
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