espelhamento de
https://github.com/tearshark/librf.git
sincronizado 2024-10-04 08:50:31 +08:00
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89 linhas
2.4 KiB
C++
89 linhas
2.4 KiB
C++
#include <chrono>
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#include <iostream>
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#include <string>
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#include <thread>
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#include "librf.h"
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using namespace resumef;
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static std::mutex cout_mutex;
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//这是一个重度计算任务,只能单开线程来避免主线程被阻塞
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auto async_heavy_computing_tasks(int64_t val)
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{
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using namespace std::chrono;
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awaitable_t<int64_t> awaitable;
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std::thread([val, st = awaitable._state]
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{
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std::this_thread::sleep_for(500ms);
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st->set_value(val * val);
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}).detach();
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return awaitable.get_future();
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}
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future_t<> heavy_computing_sequential(int64_t val)
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{
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for(size_t i = 0; i < 3; ++i)
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{
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{
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scoped_lock<std::mutex> __lock(cout_mutex);
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std::cout << val << " @" << std::this_thread::get_id() << std::endl;
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}
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val = co_await async_heavy_computing_tasks(val);
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}
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{
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scoped_lock<std::mutex> __lock(cout_mutex);
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std::cout << val << " @" << std::this_thread::get_id() << std::endl;
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}
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}
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void test_use_single_thread(int64_t val)
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{
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//使用local_scheduler_t来申明一个绑定到本线程的调度器 my_scheduler
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//后续在本线程运行的协程,通过this_scheduler()获得my_scheduler的地址
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//从而将这些协程的所有操作都绑定到my_scheduler里面去调度
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//实现一个协程始终绑定到一个线程的目的
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//在同一个线程里,申明多个local_scheduler_t会怎么样?
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//----我也不知道
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//如果不申明my_scheduler,则this_scheduler()获得默认主调度器的地址
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local_scheduler_t my_scheduler;
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{
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scoped_lock<std::mutex> __lock(cout_mutex);
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std::cout << "running in thread @" << std::this_thread::get_id() << std::endl;
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}
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go heavy_computing_sequential(val);
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this_scheduler()->run_until_notask();
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}
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const size_t N = 2;
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void test_use_multi_thread()
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{
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std::thread th_array[N];
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for (size_t i = 0; i < N; ++i)
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th_array[i] = std::thread(&test_use_single_thread, 4 + i);
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test_use_single_thread(3);
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for (auto & th : th_array)
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th.join();
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}
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void resumable_main_multi_thread()
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{
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std::cout << "test_use_single_thread @" << std::this_thread::get_id() << std::endl << std::endl;
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test_use_single_thread(2);
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std::cout << std::endl;
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std::cout << "test_use_multi_thread @" << std::this_thread::get_id() << std::endl << std::endl;
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test_use_multi_thread();
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//运行主调度器里面的协程
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//但本范例不应该有协程存在,仅演示不要忽略了主调度器
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scheduler_t::g_scheduler.run_until_notask();
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}
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