Thread safety with heap-allocated memory

Question

I was reading this: http://en.wikipedia.org/wiki/Thread_safety

Is the following function thread-safe?

void foo(int y){
    int * x = new int[50];
    /*...         


        

Answer 1

It doesn't say you can only use stack variables, it says that using heap variables "suggests the need for careful examination to see if it is unsafe".

new and delete are normally implemented in a threadsafe way (not sure that the standard guarantees that though) so your code above will probably be fine.

Plus usual recommendations of using std::vector instead of manually allocating an array, but I assume you only provided that as an example :)