如何声明线程向量

Question

我是 C++ 编程的新手，需要一些帮助才能使用带矢量库的线程库...

首先我按照这个tutorial

但编译器 (visual studio 2013) 向我显示错误，我不知道如何纠正它：

第一次函数声明

void Fractal::calcIterThread(vector<vector<iterc>> &matriz, int desdePos, int hastaPos, int idThread){
   ...
}

在主循环中

vector<vector<iterc>> res;
res.resize(altoPantalla);

for (int i = 0; i < altoPantalla; i++){
   res[i].resize(anchoPantalla);
}

int numThreads = 10;
vector<thread> workers(numThreads);

for (int i = 0; i < numThreads; i++){ //here diferent try
   thread workers[i] (calcIterThread, ref(res), inicio, fin, i)); // error: expresion must have a constant value
   workers[i] = thread(calcIterThread, ref(res), inicio, fin, i)); // error: no instance of constructor "std::thread::thread" matches the argument list
}

...rest of code...

感谢您帮助澄清

Answer 1

试试这个：

#include <functional>
#include <thread>
#include <vector>

// ...

int numThreads = 10;
std::vector<std::thread> workers;

for (int i = 0; i != numThreads; ++i)
{
    workers.emplace_back(calcIterThread, std::ref(res), inicia, fin, i);
}

for (auto & t : workers)
{
    t.join(); 
}

Answer 2

我终于可以通过更改代码来解决问题...

workers.emplace_back(thread{ [&]() {
    calcIterThread(ref(res), inicio, fin, i);
}});

如何声明线程向量

how to declare a vector of thread

c++

multithreading

declaration

vector