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Light-City 2020-02-01 09:20:20 +08:00
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README.md
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@ -137,9 +137,22 @@
- [myhashtable](./stl_src/myhashtable.md)
- [unordered_map](./stl_src/unordered_map.md)
### 3.学习课程
## 3.多线程与多进程
#### 3.1 [极客时间《现代C++实战30讲》](https://time.geekbang.org/channel/home)
### 3.1 Threading In C++
- [介绍](./Threading_In_CPlusPlus/1.thread)
- [创建线程的五种类型](./Threading_In_CPlusPlus/2.create_type)
- [Join与Detachs](./Threading_In_CPlusPlus/3.join_detach)
- [mutex in C++ Threading](./Threading_In_CPlusPlus/4.mutex)
> 学习自：
>
> https://www.youtube.com/watch?v=eZ8yKZo-PGw&list=PLk6CEY9XxSIAeK-EAh3hB4fgNvYkYmghp&index=4
### 4.学习课程
#### 4.1 [极客时间《现代C++实战30讲》](https://time.geekbang.org/channel/home)
- [堆、栈、RAII：C++里该如何管理资源？](./modern_C++_30/RAII)
- [堆](./modern_++_30/RAII/heap.cpp)
@ -166,9 +179,9 @@
- [constexpr：一个常态的世界](./modern_C++_30/constexpr)
- [函数对象和lambda：进入函数式编程](./modern_C++_30/functionLambda)
### 4.拓展部分
### 5.拓展部分
#### 4.1 [C++惯用法](./codingStyleIdioms)
#### 5.1 [C++惯用法](./codingStyleIdioms)
##### 你最喜欢的c++编程风格惯用法是什么?
@ -178,11 +191,11 @@
- [4.copy and swap](./codingStyleIdioms/4_copy-swap)
- [5.pImpl(指针指向具体实现)](./codingStyleIdioms/5_pImpl)
#### 4.2 一些问题
#### 5.2 一些问题
- [C++中如何将string类型转换为int类型？](./basic_content/extent/string_int.md)
### 5.工具篇
### 6.工具篇
- [容器快捷输出工具](./tool/output)
@ -205,22 +218,24 @@
```
- 像Python一样简单输出
- [像Python一样玩C/C++](./tool/像Python一样玩CC++.md)
- [像Python一样玩C/C++](./tool/像Python一样玩CC++.md)
- 观察编译过程变化
- [https://cppinsights.io](https://cppinsights.io/)
### 6.代码运行
### 7.代码运行
- **代码环境**
Ubuntu 18.04
Ubuntu 18.04
- **工具**
CLion gcc/g++
CLion gcc/g++
### 7.关于作者
### 8.关于作者
个人公众号：

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Threading_In_CPlusPlus/1.thread/intro.cpp Normal file
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//
// Created by light on 20-1-31.
//
#include <iostream>
#include <chrono>
using namespace std::chrono;
using namespace std;
using ull = unsigned long long;
ull OddSum = 0;
ull EvenSum = 0;
void findEven(ull start, ull end) {
for (ull i = start; i <= end; ++i)
if ((i & 1) == 0)
EvenSum += i;
}
void findOdd(ull start, ull end) {
for (ull i = start; i <= end; ++i)
if ((i & 1) == 1)
OddSum += i;
}
int main() {
ull start = 0, end = 1900000000;
auto startTime = high_resolution_clock::now();
findOdd(start, end);
findEven(start, end);
auto stopTime = high_resolution_clock::now();
auto duration = duration_cast<microseconds>(stopTime - startTime);
cout << "OddSum : " << OddSum << endl;
cout << "EvenSum: " << EvenSum << endl;
cout << "Sec: " << duration.count() / 1000000 << endl;
return 0;
}

56
Threading_In_CPlusPlus/1.thread/thread.cpp Normal file
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//
// Created by light on 20-1-31.
//
#include <iostream>
#include <thread>
#include <chrono>
using namespace std::chrono;
using namespace std;
/**
* 1.普通函数指针
* 2.Lambda函数
* 3.Functors
* 4.非静态成员函数
* 5.静态成员函数
*/
using ull = unsigned long long;
ull OddSum = 0;
ull EvenSum = 0;
void findEven(ull start, ull end) {
for (ull i = start; i <= end; ++i)
if ((i & 1) == 0)
EvenSum += i;
}
void findOdd(ull start, ull end) {
for (ull i = start; i <= end; ++i)
if ((i & 1) == 1)
OddSum += i;
}
int main() {
ull start = 0, end = 1900000000;
auto startTime = high_resolution_clock::now();
std::thread t1(findEven,start,end);
std::thread t2(findOdd,start,end);
t1.join();
t2.join();
auto stopTime = high_resolution_clock::now();
auto duration = duration_cast<microseconds>(stopTime - startTime);
cout << "OddSum : " << OddSum << endl;
cout << "EvenSum: " << EvenSum << endl;
cout << "Sec: " << duration.count() / 1000000 << endl;
return 0;
}

23
Threading_In_CPlusPlus/2.create_type/1.function_pointer.cpp Normal file
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//
// Created by light on 20-1-31.
//
// 1.函数指针
#include <thread>
#include <iostream>
using namespace std;
void fun(int x) {
while (x-- > 0) {
cout << x << endl;
}
}
// 注意：如果我们创建多线程 并不会保证哪一个先开始
int main() {
std::thread t1(fun, 10);
// std::1.thread t2(fun, 10);
t1.join();
// t2.join();
return 0;
}

31
Threading_In_CPlusPlus/2.create_type/2.lambda_function.cpp Normal file
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//
// Created by light on 20-1-31.
//
// 1.函数指针
#include <thread>
#include <iostream>
using namespace std;
// 注意：如果我们创建多线程 并不会保证哪一个先开始
int main() {
// 2.Lambda函数
auto fun = [](int x) {
while (x-- > 0) {
cout << x << endl;
}
};
// std::1.thread t1(fun, 10);
// 也可以写成下面：
std::thread t1_1([](int x) {
while (x-- > 0) {
cout << x << endl;
}
}, 11);
// std::1.thread t2(fun, 10);
// t1.join();
t1_1.join();
// t2.join();
return 0;
}

25
Threading_In_CPlusPlus/2.create_type/3.functor.cpp Normal file
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//
// Created by light on 20-1-31.
//
#include <thread>
#include <iostream>
using namespace std;
// 3.functor (Funciton Object)
class Base {
public:
void operator()(int x) {
while (x-- > 0) {
cout << x << endl;
}
}
};
int main() {
thread t(Base(), 10);
t.join();
return 0;
}

26
Threading_In_CPlusPlus/2.create_type/4.no_static_member_function.cpp Normal file
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//
// Created by light on 20-1-31.
//
#include <thread>
#include <iostream>
using namespace std;
// 4.Non-static member function
class Base {
public:
void fun(int x) {
while (x-- > 0) {
cout << x << endl;
}
}
};
int main() {
Base b;
thread t(&Base::fun,&b, 10);
t.join();
return 0;
}

25
Threading_In_CPlusPlus/2.create_type/5.static_member_function.cpp Normal file
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//
// Created by light on 20-1-31.
//
#include <thread>
#include <iostream>
using namespace std;
// 4.Non-static member function
class Base {
public:
static void fun(int x) {
while (x-- > 0) {
cout << x << endl;
}
}
};
int main() {
thread t(&Base::fun, 10);
t.join();
return 0;
}

34
Threading_In_CPlusPlus/3.join_detach/detach.cpp Normal file
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//
// Created by light on 20-1-31.
//
// join 注意点
/**
* 这用于从父线程分离新创建的线程
* 在分离线程之前，请务必检查它是否可以joinable，
* 否则可能会导致两次分离，并且双重detach()将导致程序终止
* 如果我们有分离的线程并且main函数正在返回，那么分离的线程执行将被挂起
*/
#include <iostream>
#include <thread>
#include <chrono>
#include <mutex>
using namespace std;
void run(int count) {
while (count-- > 0) {
cout << count << endl;
}
std::this_thread::sleep_for(chrono::seconds(3));
}
int main() {
thread t1(run, 10);
cout << "main()" << endl;
t1.detach();
if(t1.joinable())
t1.detach();
cout << "main() after" << endl;
return 0;
}

35
Threading_In_CPlusPlus/3.join_detach/join.cpp Normal file
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//
// Created by light on 20-1-31.
//
// join 注意点
/**
* 一旦线程开始，我们要想等待线程完成，需要在该对象上调用join()
* 双重join将导致程序终止
* 在join之前我们应该检查显示是否可以被join,通过使用joinable()
*/
#include <iostream>
#include <thread>
#include <chrono>
using namespace std;
void run(int count) {
while (count-- > 0) {
cout << count << endl;
}
std::this_thread::sleep_for(chrono::seconds(3));
}
int main() {
thread t1(run, 10);
cout << "main()" << endl;
t1.join();
if (t1.joinable()) {
t1.join();
}
cout << "main() after" << endl;
return 0;
}

34
Threading_In_CPlusPlus/4.mutex/critical_section.cpp Normal file
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//
// Created by light on 20-2-1.
//
#include <iostream>
#include <mutex>
#include <thread>
using namespace std;
int sum = 0; //shared
mutex m;
void *countgold() {
int i; //local to each thread
for (i = 0; i < 10000000; i++) {
m.lock();
sum += 1;
m.unlock();
}
return NULL;
}
int main() {
thread t1(countgold);
thread t2(countgold);
//Wait for both threads to finish
t1.join();
t2.join();
cout << "sum = " << sum << endl;
return 0;
}

16
Threading_In_CPlusPlus/CMakeLists.txt Normal file
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cmake_minimum_required(VERSION 3.14)
project(Threading_In_CPlusPlus)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
add_executable(intro 1.thread/intro.cpp)
add_executable(1.thread 1.thread/thread.cpp)
add_executable(1.function_pointer 2.create_type/1.function_pointer.cpp)
add_executable(2.lambda_function 2.create_type/2.lambda_function.cpp)
add_executable(3.functor 2.create_type/3.functor.cpp)
add_executable(4.static_member_function 2.create_type/4.no_static_member_function.cpp)
add_executable(5.static_member_function 2.create_type/5.static_member_function.cpp)
add_executable(join 3.join_detach/join.cpp)
add_executable(detach 3.join_detach/detach.cpp)
add_executable(critical_section 4.mutex/critical_section.cpp)