pthread

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <string.h>

#include <pthread.h>



void *thread_function(void *arg);



char message[] = "Hello world!\n";



int main() {

	int res;

	pthread_t a_thread;

	void *thread_result;



	res = pthread_create(&a_thread, NULL, thread_function, (void *)message);

	if(res != 0) {

		perror("Thread creation failed");

		exit(EXIT_FAILURE);

	}

	printf("Waiting for thread to finish...\n");

	res = pthread_join(a_thread, &thread_result);

	if(res != 0) {

		perror("Thread join failed");

		exit(EXIT_FAILURE);

	}

	printf("Thread joined, it returned %s\n", (char*)thread_result);

	printf("Message is now %s\n", message);

	exit(EXIT_SUCCESS);

}



void *thread_function(void *arg) {

	printf("Thread function is running, argument is %s\n", (char*)arg);

	sleep(3);

  strcpy(message, "Bye~");

	pthread_exit("Thank you for CPU time~");

}

编译命令： gcc -o pthread1 thread1.c -lpthread