#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <time.h>
#define MAX 3

int number =0;
pthread_t id[2];
pthread_mutex_t mut; //初始化靜態互斥鎖

void thread1(void)
{
    int i;
    printf("Hello,I am pthread1!/n");
    for (i=0; i<MAX; i++)
    {
        pthread_mutex_lock(&mut);  //此處上鎖，保證number的唯一性
            number ++;  
            printf("Thread1:number = %d/n",number);
        pthread_mutex_unlock(&mut);
        sleep(1);  //linux c下 sleep(minute),里面變量單位是分鐘
    }
    pthread_exit(NULL); //線程通過執行此函數，終止執行。返回是一個空指針類型
}

void thread2(void)
{
    int j;
    printf("Hello,I'm pthread2/n");
    for(j=0; j<MAX; j++)
    {
        pthread_mutex_lock(&mut);
             number ++;
             printf("Thread2:number = %d/n",number);
        pthread_mutex_unlock(&mut);
        sleep(1);
    }
    pthread_exit(NULL);
}

void thread_create(void)
{
    int temp;
    memset(&id, 0, sizeof(id));
if(temp = pthread_create(&id[0], NULL, (void *)thread1, NULL)!= 0)
                          //參數：線程標識符指針 線程屬性  線程運行函數起始地址  運行函數屬性
                          //創建成功返回 0
        printf("Thread 1 fail to create!/n");
    else
        printf("Thread 1 created/n");
    if(temp = pthread_create(&id[1], NULL, (void *)thread2, NULL)!= 0)
        printf("Thread 2 fail to create!/n");
    else
        printf("Thread 2 created!/n");
 }  
void thread_wait()
{
    if(id[0] != 0)
    {
        pthread_join(id[0], NULL); //等待線程結束，使用此函數對創建的線程資源回收
        printf("Thread1 completed!/n");
    }
    if(id[1] != 0)
    {
        pthread_join(id[1], NULL);
        printf("Thread2 completed!/n");
    }
}
int main(void)
{
int i,ret1,ret2;
pthread_mutex_init(&mut, NULL); //動態互斥鎖
    printf("Main fuction,creating thread.../n");
    thread_create();
    printf("Main fuction, waiting for the pthread end!/n");
    thread_wait();
    return (0);
}