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#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
void *thread_function( void *ptr );
struct thread_data {
int tnum;
};
int
main()
{
pthread_t thread1, thread2;
int iret1, iret2;
/* Create independent threads each of which will execute function */
struct thread_data t1 = { 1 };
struct thread_data t2 = { 2 };
iret1 = pthread_create(&thread1, NULL, thread_function, (void*) &t1);
iret2 = pthread_create(&thread2, NULL, thread_function, (void*) &t2);
/* Wait till threads are complete before main continues. Unless we
* wait we run the risk of executing an exit which will terminate
* the process and all threads before the threads have
* completed. */
pthread_join(thread1, NULL);
pthread_join(thread2, NULL);
printf("Thread 1 returns: %d\n", iret1);
printf("Thread 2 returns: %d\n", iret2);
exit(0);
}
void *thread_function(void *ptr)
{
struct thread_data *td = ptr;
if (td->tnum == 1) {
int fd = open("/dev/null", O_RDONLY);
close(fd);
}
}
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