thread.c

#include <stdio.h>
#include <pthread.h>
#include <stdio.h>
#include <linux/unistd.h>
#include <sys/syscall.h>

static pid_t gettid( void )
{
	return syscall(__NR_gettid);
}

static void *thread_fun(void *param)
{
	printf("thread pid:%d, tid:%d pthread_self:%lu\n", getpid(), gettid(),pthread_self());
	while(1);
	return NULL;
}

int main(void)
{
	pthread_t tid1, tid2;
	int ret;

	printf("thread pid:%d, tid:%d pthread_self:%lu\n", getpid(), gettid(),pthread_self());

	ret = pthread_create(&tid1, NULL, thread_fun, NULL);
	if (ret == -1) {
		perror("cannot create new thread");
		return -1;
	}

	ret = pthread_create(&tid2, NULL, thread_fun, NULL);
	if (ret == -1) {
		perror("cannot create new thread");
		return -1;
	}

	if (pthread_join(tid1, NULL) != 0) {
		perror("call pthread_join function fail");
		return -1;
	}

	if (pthread_join(tid2, NULL) != 0) {
		perror("call pthread_join function fail");
		return -1;
	}

	return 0;
}