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c++multithreadingc++11stdvectorstdatomic

How to assign a vector of atomic types?

How can I assign the members of a vector with an atomic type? 

#include <iostream>
#include <thread>
#include <vector>

using namespace std;

int main()
{
    vector<atomic<bool>> myvector;
    int N=8;
    myvector.assign(N,false);
    cout<<"done!"<<endl;
}

https://wandbox.org/permlink/lchfOvqyL3YKNivk

prog.cc: In function 'int main()':
prog.cc:11:28: error: no matching function for call to 'std::vector<std::atomic<bool> >::assign(int&, bool)'
   11 |     myvector.assign(N,false);
      |                            ^
Solution

  • std::atomic is neither copyable or move constructible, so you might do instead:

    std::vector<std::atomic<bool>> myvector(8);
for (auto& b : myvector) { std::atomic_init(&b, false); }