利用互斥锁+条件变量进行奇偶交替打印

线程1打印奇数，线程2打印偶数

#include
#include
#include

#define MAX_COUNT 10
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
int count = 1;
//1 3 5 7 9
void* fun1(void *arg)
{
    pthread_mutex_lock(&mutex);
    while(count <= MAX_COUNT)
    {
        if(count % 2 == 1)
        {
            printf("This is threadfun1 %d\n", count);
            count++;
            pthread_cond_signal(&cond);
        }
        else
            pthread_cond_wait(&cond, &mutex);
        //sleep(1);
    }
    pthread_mutex_unlock(&mutex);
}
//2 4 6 8 10
void* fun2(void *arg)
{
    pthread_mutex_lock(&mutex);
    while(count <= MAX_COUNT)
    {
        if(count % 2 == 0)
        {
            printf("This is threadfun2 %d\n", count);
           count++;
            pthread_cond_signal(&cond);
        }
        else
            pthread_cond_wait(&cond, &mutex);
    }
    pthread_mutex_unlock(&mutex);
}
int main(int argc, char const* argv[])
{
    pthread_t tid[2];
    pthread_create(&tid[0], NULL, fun1, NULL);
    // sleep(1);
    pthread_create(&tid[1], NULL, fun2, NULL);

    for(int i=0; i<2; ++i)
    {
        pthread_join(tid[i],NULL);
    }
    return 0;
}

结果