linux 多线程

#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#include <termios.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <time.h>
#include <ctype.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/i2c-dev.h>
#include <linux/i2c.h>
#include <pthread.h>
#include <strings.h>
#include <unistd.h>
#include <string.h>


int tty_fd[3] = {0};
pthread_t tty_pid[6] = {0};
pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;

static void *thread_start_tty1(void *arg)
{
    puts("-------thread1-------");
    while(1)
    {
        pthread_mutex_lock(&g_mutex);
        puts("-------1----------");
         tty_fd[0] = 1;
         sleep(3);
        pthread_mutex_unlock(&g_mutex);
    }
}

static void *thread_start_tty2()
{
        puts("--------thread2--------");
        pthread_mutex_lock(&g_mutex);
         puts("--------2-----------");
         tty_fd[1] = 2;
         sleep(3);
        pthread_mutex_unlock(&g_mutex);
}


static void *thread_start_tty3(void *arg)
{
    puts("--------thread3-----------");
    while(1)
    {
     }

}

void CreateUartPhtread()
{
    int ret = -1;
    ret = pthread_create(&tty_pid[0], NULL, &thread_start_tty1, NULL);
    if(0 != ret) {
        printf("create thread1 fail!\n");
        return ;
    }

    ret = pthread_create(&tty_pid[1], NULL, &thread_start_tty2, NULL);
    if(0 != ret) {
        printf("create thread2 fail!\n");
        return ;
    }

    ret = pthread_create(&tty_pid[2], NULL, &thread_start_tty3, NULL);
    if(0 != ret) {
        printf("create thread3 fail!\n");
        return ;
    }

/*    ret = pthread_create(&tty_pid[3], NULL, &thread_start_ttys4_read, NULL);
    if(0 != ret) {
        printf("create thread4  fail!\n");
        return ;
    }

    ret = pthread_create(&tty_pid[4], NULL, &thread_start_ttys3_read, NULL);
    if(0 != ret) {
        printf("create thread5  fail!\n");
        return ;
    }

    ret = pthread_create(&tty_pid[5], NULL, &thread_start_ttys2_read, NULL);
    if(0 != ret) {
        printf("create thread6  fail!\n");
        return ;
    }
*/
}


int main()
{


    CreateUartPhtread();
    while(1);

    return 0;
}