Example: Starting a thread in a Pthread program

/*
Filename: ATEST11.QCSRC
The output of this example is as follows:
 Enter Testcase - LIBRARY/ATEST11
 Create/start a thread with parameters
 Wait for the thread to complete
 Thread ID 0000000c, Parameters: 42 is the answer to "Life, the Universe and Everything"
 Main completed
*/
#define _MULTI_THREADED
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define checkResults(string, val) {             \
 if (val) {                                     \
   printf("Failed with %d at %s", val, string); \
   exit(1);                                     \
 }                                              \
}
typedef struct {
   int      threadParm1;
   char     threadParm2[124];
} threadParm_t;
 
void *theThread(void *parm)
{
   pthread_id_np_t      tid;
   threadParm_t *p = (threadParm_t *)parm;
   tid = pthread_getthreadid_np();
   printf("Thread ID %.8x, Parameters: %d is the answer to \"%s\"\n",
          tid.intId.lo, p->threadParm1, p->threadParm2);
   return NULL;
}
 
int main(int argc, char **argv)
{
  pthread_t             thread;
  int                   rc=0;
  threadParm_t         *threadParm;
 
  printf("Enter Testcase - %s\n", argv[0]);
 
  threadParm = (threadParm_t *)malloc(sizeof(threadParm));
  threadParm->threadParm1 = 42;
  strcpy(threadParm->threadParm2, "Life, the Universe and Everything");
 
  printf("Create/start a thread with parameters\n");
  rc = pthread_create(&thread, NULL, theThread, threadParm);
  checkResults("pthread_create()\n", rc);
 
  printf("Wait for the thread to complete\n");
  rc = pthread_join(thread, NULL);
  checkResults("pthread_join()\n", rc);
 
  printf("Main completed\n");
  return 0;
}