@programminginc - страница 2929

Pavel

Make it a shared_ptr then

unique_ptr?

Liam

i need to create in heap

Constructing objects in heap requires more mechanisms to ensure thread-safety.

MRT

why?

I need a lot of RAM

Liam

I need a lot of RAM

template <typename T> struct Singleton { static T* get() { static T* p{nullptr}; std::call_once(flag, [&]() -> void { p = new T; }); return p; } T* operator->() const { return get(); } private: static std::once_flag flag; }; template <typename T> std::once_flag Singleton<T>::flag;

Liam

remember to #include <mutex>

MRT

template <typename T> struct Singleton { static T* get() { static T* p{nullptr}; std::call_once(flag, [&]() -> void { p = new T; }); return p; } T* operator->() const { return get(); } private: static std::once_flag flag; }; template <typename T> std::once_flag Singleton<T>::flag;

thanks, its thread safe ?

Liam

Make it a shared_ptr then

smart pointers here are dangerous.

Liam

thanks, its thread safe ?

yes.

Nils

smart pointers here are dangerous.

Why

Nils

Ohhh I see...

MRT

ok thank

Liam

Why

order of releasing static objects are not well defined. if one refers to another, it might cause a crash.

MRT

yes.

you worked on qtcpsocket ?

Nils

order of releasing static objects are not well defined. if one refers to another, it might cause a crash.

Yeah also memory would never be released right?

Liam

Yeah also memory would never be released right?

yes. but this kinds of static objects are released when process is ending. memleak is not a big deal in the aspect.

Nils

Ah.

Liam

you worked on qtcpsocket ?

nope. I'm not a *pure* C++ developer, actually, machine learning engineer instead.

MRT

Thank you very much, good luck

Liam

I need a lot of RAM

BTW, static objects are not allocated on normal stack mem. there is a section for global static objects.

Liam

your compiler will handle this well for you.

MRT

BTW, static objects are not allocated on normal stack mem. there is a section for global static objects.

As you say, the term stack and heap is for entertainment

Raghad

Hi, any one can help me? I have this issue in vs : The system cannot find the file specified . I use _CRT_SECURE_NO_WARNING But dosent works

Andrew

Hi, any one can help me? I have this issue in vs : The system cannot find the file specified . I use _CRT_SECURE_NO_WARNING But dosent works

If your using gdb you dont need it

Andrew

And its WARNINGS not WARNING

Anonymous

would this be correct? https://gist.github.com/2c6ca37149c201b439d40ec55a0cd9a5 for resolving (a given cwd and a given path) to the directory, respecting trailing slashes

B M

Looking for point of sales

Radmehr

Hey everyone! I hope you are having a nice day! I am doing a research on programmer, the title is the effect of music on rogrammers and the whole post is on reddit, it is fun in my opinion but nobody has taken part yet…so I'll be so glad if you take part in it

Radmehr

Is it against the rules if I share the reddit link?