jimmy-park/singleton

C++11/17/20 thread-safe singleton pattern using CRTP

singleton's Issues

How to start a thread with a singleton class's member function?

I tried the following code, but it did not work:

class WebsocketManager : public SingletonDclp<WebsocketManager> {
    // ...
    void sendAction(types::WsAction action);

    void sendAction(types::WsAction action, nlohmann::json&& data);
}

enum class WsAction {
    CompletionAccept,
    CompletionCache,
    CompletionCancel,
    CompletionGenerate,
    DebugSync,
};

// Failed to compile
thread(&WebsocketManager::sendAction, WebsocketManager::GetInstance(), WsAction::CompletionCancel).detach();

The compile log is:

C:\xxxx\CompletionManager.cc(246): error C2440: '<function-style-cast>': cannot convert from 'initializer list' to 'std::thread'
C:\xxxx\CompletionManager.cc(246): note: 'std::thread::thread': function does not take 3 arguments
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\thread(92): note: could be 'std::thread::thread(_Fn &&,_Args &&...)'
C:\xxxx\CompletionManager.cc(246): note: while trying to match the argument list '(overloaded-function, Derived *, types::WsAction)'