simple pthread C program - Synchronization question - c

Question

I got this simple C program that uses pthreads.
I basically want to call my_function() once I'm 100% sure that my_thread() gets called and is executed.
I need to know how to synchronize the main() function and the my_thread() function.
Please note that the my_thread() never returns.
#include <stdio.h>
#include <pthread.h>
void my_function (void);
void* my_thread (void* arg);
int main (int argc, char* argv[])
{
int rc;
pthread_t id;
rc = pthread_create(&id, NULL, my_thread, NULL);
if (rc != 0)
{
return -10;
}
/*
* I wanna call my_function() once I'm 100% sure my_thread() gets called and being executed
*/
/*
* Synchronization code to add here:
*/
my_function();
return 0;
}
void* my_thread (void* arg)
{
/*
* This pthread never returns
*/
while (1)
{
/* stuff */
};
}
void my_function (void)
{
printf("Hello\n");
}
Thanks for your help.

Answer 1

Can anybody check if this solution is correct?
It works using the debugger but I would like to have a comment from experienced programmers.
#include <stdio.h>
#include <pthread.h>
void my_function (void);
void* my_thread (void* arg);
int started;
pthread_mutex_t mutex;
pthread_t id;
int main (int argc, char* argv[])
{
int rc;
int done;
started = 0;
mutex = PTHREAD_MUTEX_INITIALIZER;
rc = pthread_create(&id, NULL, my_thread, NULL);
if (rc != 0)
{
return -10;
}
/*
* Synchronization code proposed:
*/
done = 0;
do
{
pthread_mutex_lock(&mutex);
if (started == 1)
{
done = 1;
}
pthread_mutex_unlock(&mutex);
}
while (done == 0);
/*
* I wanna call my_function() once I'm 100% sure
* that my_thread() is called and being executed
*/
my_function();
return 0;
}
void* my_thread (void* arg)
{
started = 1;
while (1)
{
/* stuff */
};
}
void my_function (void)
{
printf("Hello\n");
}