标签:stream ace code initial 输出 lock null signal std
#include <pthread.h>
#include <iostream>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
using namespace std;
pthread_cond_t qready = PTHREAD_COND_INITIALIZER;
pthread_mutex_t qlock = PTHREAD_MUTEX_INITIALIZER;
bool flag = false;
int i = 0;
void* PrintA(void *arg){
while(1){
pthread_mutex_lock(&qlock);
pthread_cond_wait(&qready,&qlock);
cout << "A = " << i << endl;
i ++;
pthread_mutex_unlock(&qlock);
flag = false;
if(i >= 100){
break;
}
}
}
void* PrintB(void *arg){
while(1){
if(i >= 100) break;
if(flag == true) continue;
pthread_mutex_lock(&qlock);
cout << "B = " << i << endl;
i ++;
pthread_mutex_unlock(&qlock);
if(flag == false){
flag = true;
pthread_cond_signal(&qready);
}
}
}
int main(){
pthread_t tid1, tid2;
int iRet = pthread_create(&tid1, NULL, PrintA, NULL);
iRet = pthread_create(&tid2, NULL, PrintB, NULL);
void * retval;
iRet = pthread_join(tid1, &retval);
iRet = pthread_join(tid2, &retval);
return 0;
}
标签:stream ace code initial 输出 lock null signal std
原文地址:https://www.cnblogs.com/qq136155330/p/12735314.html