CODEWITHSUNDEEP
c++shared-ptrstdatomic
Raj
Raj

Reputation: 417

atomic operations on shared pointers, c++ versions

I was working on this thread swap c++ map objects in multithreaded environment

However,

#include <memory>
#include <thread>
#include <chrono>
#include <atomic>
#include <iostream>
using namespace std;

shared_ptr<std::string> the_string;

int main()
{
     atomic_store(&the_string, std::make_shared<std::string>("first string"));
}

gives a compile time error 

error: no matching function for call to 'atomic_store'
     atomic_store(&the_string, std::make_shared<std::string>("first string"));
     ^~~~~~~~~~~~
/Library/Developer/CommandLineTools/usr/include/c++/v1/atomic:1165:1: note: candidate template ignored: could not match 'atomic' against 'shared_ptr'
atomic_store(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT

I did see a few threads on this problem and understand that it could be related to C++ version I have /usr/include/c++/4.2.1/ and /usr/include/c++/4.8.5/ on another box, both give the same issue. Should I upgrade the C++ version?

I resolved this issue by passing -std=c++11 flag.

Upvotes: 1

Views: 611

Answers (2)

Raj
Raj

Reputation: 417

I resolved this issue by passing the flag -std=c++11

Upvotes: 1

Nikos C.
Nikos C.

Reputation: 51842

It compiles fine here with GCC 8.3 and Clang 8.0, so yes, you should upgrade your compiler.

Upvotes: 0

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