use of deleted function - std::atomic

Question

This is the declaration I have in .h file:

static std::atomic<int> OrdersExecutorIdCounter;

This is initilization from .cpp file:

std::atomic<int> ActionBasedOrdersExecutor::OrdersExecutorIdCounter = 0;

It compiles just fine in VC++, but in gcc 4.8 I get this error:

error: use of deleted function ‘std::atomic<int>::atomic(const std::atomic<int>&)’

How can I solve this problem?

Think about what this code does in theory. Hint: copy-initialization makes a difference. — chris, Sep 19 '14 at 19:04
`g++ -std=c++0x -I"/home/oleg/eclipseWorkspace/CommonsLibrary" -O3 -Wall -c -fmessage-length=0 -MMD -MP -MF"ActionBasedOrdersExecutor.d" -MT"ActionBasedOrdersExecutor.d" -o "ActionBasedOrdersExecutor.o" "../ActionBasedOrdersExecutor.cpp"`, i've removed some `-I` as not important — Oleg Vazhnev, Sep 19 '14 at 19:04
@javapowered - Possible (similar) duplicated: https://stackoverflow.com/q/27314485/1971003 — Guy Avraham, Dec 11 '17 at 19:31

score 14 · Accepted Answer · answered Sep 19 '14 at 19:05

14

You can directly initialise the atomic variable, which does not require deleted copy constructor, eg:

std::atomic<int> ActionBasedOrdersExecutor::OrdersExecutorIdCounter{0};

answered Sep 19 '14 at 19:05

Rafal Mielniczuk

score 1 · Answer 2 · answered Sep 19 '14 at 19:06

1

You don't need (or want) to initialize your atomic integer to 0 (the int value would be 0 initialized for a global).

answered Sep 19 '14 at 19:06

2 Answers2