#include <semaphore.h>
int pthread_cond_init(pthread_cond_t *cond, pthread_condattr_t *cond_attr) ;
int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);
int pthread_cond_signal(pthread_cond_t *cond);
int pthread_cond_broadcast(pthread_cond_t *cond);
int pthread_cond_destroy(pthread_cond_t *cond);

#include <stdio.h>
#include <semaphore.h>
#include <pthread.h>pthread_t t1;
pthread_t t2;pthread_mutex_t mutex;
pthread_cond_t cond;int i=0;void* Process1(void* arg)
{while(1){pthread_mutex_lock(&mutex);i++;if(i%5 == 0){pthread_cond_signal(&cond);}else{printf("this is Process1n");}pthread_mutex_unlock(&mutex);sleep(2);}
}void* Process2(void* arg)
{while(1){pthread_mutex_lock(&mutex);pthread_cond_wait(&cond,&mutex);printf("this is Process2,i=%dn",i);pthread_mutex_unlock(&mutex);sleep(2);}
}int main()
{pthread_cond_init(&cond,NULL);pthread_mutex_init(&mutex,NULL);pthread_create(&t1,NULL,Process1,NULL);pthread_create(&t2,NULL,Process2,NULL);pthread_join(t1,NULL);pthread_join(t2,NULL);return 0;
}

root@iZuf67on1pthsuih96udyfZ:~/C++/C++_test/Progress/cond# ./test1
this is Process1
this is Process1
this is Process1
this is Process1
this is Process2,i=5
this is Process1
this is Process1
this is Process1
this is Process1
this is Process2,i=10
this is Process1
this is Process1
^C

#include <iostream>
#include <thread>
#include <condition_variable>
#include <mutex>
#include <unistd.h>using namespace std;//全局条件变量
condition_variable cond;
mutex _mutex;
int count = 0;void fun1()
{while(1){count++;unique_lock<mutex>lock(_mutex);if(count%5 == 0){cond.notify_one();}else{cout<<"this is fun1,count="<<count<<endl;}lock.unlock();sleep(1);}
}void fun2()
{while(1){unique_lock<mutex>lock(_mutex);cond.wait(lock);cout<<"this is fun2,count="<<count<<endl;lock.unlock();sleep(2);}
}int main()
{thread t1(fun1);thread t2(fun2);t1.join();t2.join();return 0;
}

root@iZuf67on1pthsuih96udyfZ:~/C++/C++_test/Progress/cond# g++ -std=c++11 test2.cpp -o test2 -lpthread
root@iZuf67on1pthsuih96udyfZ:~/C++/C++_test/Progress/cond# ./test2
this is fun1,count=1
this is fun1,count=2
this is fun1,count=3
this is fun1,count=4
this is fun2,count=5
this is fun1,count=6
this is fun1,count=7
this is fun1,count=8
^C