C++ std::线程 "Attempt to use a deleted function"

Question

这是相关代码和相关错误，我不太确定该怎么做。

Breaker::Thread::Thread(std::string name, std::string desc, void* func)
{
    std::thread _thread(func);

    _thread.join();
}

那个在thread.cpp里，下一个在log.cpp里...

thread = new Breaker::Thread("System Log", loop);

和

void* Breaker::Log::loop()
{
    add("test");
}

这是相关的错误:

In file included from /home/nope/Documents/dev/C++/Breaker Engine/src/core/thread.cpp:25:
In file included from /home/nope/Documents/dev/C++/Breaker Engine/src/core/thread.h:28:
/usr/bin/../include/c++/v1/thread:332:5: error: attempt to use a deleted function
    __invoke(_VSTD::move(_VSTD::get<0>(__t)), _VSTD::move(_VSTD::get<_Indices>(__t))...);
    ^
/usr/bin/../include/c++/v1/thread:342:5: note: in instantiation of function template specialization 'std::__1::__thread_execute<void *>' requested here
    __thread_execute(*__p, _Index());
    ^
/usr/bin/../include/c++/v1/thread:354:42: note: in instantiation of function template specialization 'std::__1::__thread_proxy<std::__1::tuple<void *> >'
      requested here
    int __ec = pthread_create(&__t_, 0, &__thread_proxy<_Gp>, __p.get());
                                         ^
/home/nope/Documents/dev/C++/Breaker Engine/src/core/thread.cpp:95:14: note: in instantiation of function template specialization
      'std::__1::thread::thread<void *&, void>' requested here
        std::thread _thread(func);
                    ^
/usr/bin/../include/c++/v1/type_traits:1027:5: note: '~__nat' has been explicitly marked deleted here
    ~__nat() = delete;
    ^

Answer 1

我认为问题出在参数func 的声明上。它被声明为 void 指针，而不是指向返回 void 的函数的指针。

代替，

Breaker::Thread::Thread(std::string name, std::string desc, void* func)

我想你的意思是，

Breaker::Thread::Thread(std::string name, std::string desc, void (*func) ())

注意，loop 必须是静态成员才能正常工作。

此外，您可能需要考虑使用 std::function。这是一个比使用 void 指针更现代、更简洁的界面。

Breaker::Thread::Thread(std::string name, std::string desc, std::function<void()> func)