Linux创建线程

 

#include"stdio.h"
#include"unistd.h"
#include"stdlib.h"
#include"pthread.h"
#include"semaphore.h"
#include"string.h"
void *thread_function(void *arg);
pthread_mutex_t work_mutex;

#define WORK_SIZE 1024
char work_area[WORK_SIZE];
int time_to_exit=0;

int main()
{
    int res;
    pthread_t a_thread;
    void *thread_result;
    res=pthread_mutex_init(&work_mutex,NULL);
    if(res!=0){
        perror("Mutex initialization failed");
        exit(EXIT_FAILURE);
    }
    res=pthread_create(&a_thread,NULL,thread_function,NULL);
    if(res!=0){
        perror("Thread creation failed!\n");
        exit(EXIT_FAILURE);
    }

    pthread_mutex_lock(&work_mutex);
    printf("Input some text.Enter 'end' to finish\n");
    while(!time_to_exit){
        fgets(work_area,WORK_SIZE,stdin);
        pthread_mutex_unlock(&work_mutex);
        while(1){
            pthread_mutex_unlock(&work_mutex);
            if(work_area[0]!='\0'){
                pthread_mutex_unlock(&work_mutex);
                sleep(1);
            }
            else{
                break;
            }
        }
        pthread_mutex_unlock(&work_mutex);
        printf("\nWaiting for thresd to finish...\n");
        res=pthread_join(a_thread,&thread_result);
        if(res!=0){
            perror("Thread join failed!\n");
            exit(EXIT_FAILURE);
        }
        printf("Thread joined!\n");
        pthread_mutex_destroy(&work_mutex);
        exit(EXIT_SUCCESS);
    }
}
void *thread_function(void *arg)
{
    sleep(1);
    pthread_mutex_lock(&work_mutex);
    while(strncmp("end",work_area,3)!=0){
        printf("You input %d chatacters\n",strlen(work_area)-1);
        work_area[0]='\0';
        pthread_mutex_lock(&work_mutex);
        sleep(1);
        pthread_mutex_lock(&work_mutex);
        while(work_area[0]=='\0'){
            pthread_mutex_unlock(&work_mutex);
            sleep(1);
            pthread_mutex_lock(&work_mutex);
        }
    }
    time_to_exit=1;
    work_area[0]='\0';
    pthread_mutex_unlock(&work_mutex);
    pthread_exit(0);
}