Question

This is my struct:

struct example {
    int c=0;
    char buf[10];
}

I have a struct of this type allocated in main()

...
struct example *ex=malloc(sizeof(*ex));
...

and passed to a thread by

...
pthread_create(&id[i], NULL, t_func, ex);
...

pthread_create is called into a child of main.

t_func is:

void *t_func(void* args) {
   struct example *extmp = args;
   ....

How can I create a local struct example in every thread and copy into it the struct and the values of args? I need it such that if I modify a field of the local struct, that will not be seen in other threads. I’ve seen other similar questions, but I haven’t found my answer…

Answer 1

In C you can assign objects of structure type:

struct example *extmp = args; 
struct example local_copy = *extmp;