std::this_thread::yield - cppreference.com
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      std::this_thread::yield

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      C++
       
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      Threads
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      Threads
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      (C++11)
      this_thread namespace
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      this_thread namespace
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      Exclusão mútua
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      Mutual exclusion
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      Gestão de bloqueio genérico
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      Generic lock management
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      Variáveis ​​de condição
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      Condition variables
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      <tbody> </tbody>
      Fornece uma dica para a implementação de remarcar a execução de threads, permitindo que outros segmentos para executar.
      Original:
      Provides a hint to the implementation to reschedule the execution of threads, allowing other threads to run.
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      Parâmetros

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      (none)
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      Valor de retorno

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      Exemplo

      #include <iostream>
#include <chrono>
#include <thread>

// "busy sleep" while suggesting that other threads run 
// for a small amount of time
void little_sleep(std::chrono::microseconds us)
{
    auto start = std::chrono::high_resolution_clock::now();
    auto end = start + us;
    do {
        std::this_thread::yield();
    } while (std::chrono::high_resolution_clock::now() < end);
}

int main()
{
    auto start = std::chrono::high_resolution_clock::now();

    little_sleep(std::chrono::microseconds(100));

    auto elapsed = std::chrono::high_resolution_clock::now() - start;
    std::cout << "waited for "
              << std::chrono::duration_cast<std::chrono::microseconds>(elapsed).count()
              << " microseconds\n";
}

      Potencial saída: 

      waited for 128 microseconds