default_thread_pool_size.hpp

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/*
 * SObjectizer-5
 */
 
/*!
 * \file
 * \brief Reusable function for the default size for a thread pool.
 */
 
#pragma once
 
#include <thread>
 
namespace so_5::disp::reuse
{
 
//
// default_thread_pool_size
//
/*!
 * \brief A helper function for detecting default thread count for
 * thread pool.
 *
 * Returns value of std::thread::hardware_concurrency() or 2 if
 * hardware_concurrency() returns 0.
 *
 * \since v.5.8.0
 */
[[nodiscard]]
inline std::size_t
default_thread_pool_size()
  {
    auto c = std::thread::hardware_concurrency();
    if( !c )
      c = 2;
 
    return c;
  }
 
} /* namespace so_5::disp::reuse */