进程互斥（C语言实现）

 

 

 

#include "pthread.h" 
#include "sched.h" 
#include "semaphore.h" 
#include "stdio.h" 
#include "windows.h"
#pragma comment(lib, "pthreadVC2.lib")     //必须加上这句
pthread_t t1;           //pthread_t变量t1，用于获取线程1的ID
pthread_t t2;           //pthread_t变量t2，用于获取线程2的ID
char Share[10];         //共享资源区
pthread_mutex_t work_mutex;                    //声明互斥量work_mutex
void* My_thread_1(void* args){
	while(1){
	   char *p=Share;
	   //pthread_mutex_lock(&work_mutex);      //加锁
	   for(int i=0;i<9;i++)
	   {
	       *p='a';             //线程1将Share写成aaaaaaaa
		   Sleep(100);
		   p++;
	   }
	   p++;
	   *p='\0';
	   printf("1 Share is : %s\n",Share);
	   //pthread_mutex_unlock(&work_mutex);   //解锁
	   //Sleep(100)            //启用互斥量时也去除注释，为进程调度提供时间
	   }
	   return NULL;
}
void* My_thread_2(void* args){
	while(1){
	   char *p=Share;
	   //pthread_mutex_lock(&work_mutex);     //加锁
	   for(int i=0;i<9;i++)
	   {
	       *p='e';             //线程1将Share写成eeeeeeee
		   Sleep(150);
		   p++;
	   }
	   p++;
	   *p='\0';
	   printf("2 Share is : %s\n",Share);
	   //pthread_mutex_unlock(&work_mutex);   //解锁
	   //Sleep(100)            //启用互斥量时也去除注释，为进程调度提供时间
	   }
	   return NULL;
}
int main(){
	   //pthread_mutex_init(&work_mutex, NULL);   //初始化互斥量
       pthread_create(&t1,NULL,My_thread_1,NULL);
	   pthread_create(&t2,NULL,My_thread_2,NULL);
       Sleep(1000000);
	   //pthread_mutex_destroy(&work_mutex);      //销毁互斥量
       return 0;
}