Jump to content
  • Advertisement
Sign in to follow this  
amt35

pthreads: Passing a char* array

This topic is 5138 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Using pthreads in C you have to pass your parameters as a (void *). My problem is I don't know how to pass a char* array as a (void *) and then convert it back. So in my main program I do this: char* thread_param[2]; thread_param[0] = .. thread_param[1] = .. ... ... pthread_create(..,..,mythead,(void*)thread_param); ... } But then in the thead how do I convert "args" back to a char* thread_param[2]? void mythread(void* args){ char* thread_param[2] = ? } Ideas?? Thanks!!

Share this post


Link to post
Share on other sites
Advertisement
Do the reverse of when you casted the array to void *.

char *array = (char *)thread_param;

The [] operator is used when declaring or accessing an element of an array. A one-dimensional array is essentially a char *.

Kuphryn

Share this post


Link to post
Share on other sites
It's an array of char*'s though so you'd need a double pointer... but you lose the size information [2] along the way.

The easy thing to do (in C) is wrap it in a struct...

typedef struct
{
char* params[2];
} MYTHREADPARAMS;

and pass the address of an instance of the struct.

In C++, you'd pass the address of a std::vector of std::string.

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!