子线程循环 10 次,接着主线程循环 100 次,接着又回到子线程循环 10 次,接着再回到主线程又循环 100 次,如此循环50次,试写出代码。
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
static pthread_mutex_t mtx=PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
static void *thread_func(void *arg)
{
//sleep(10);
int j=3;
while(j--)
{
pthread_mutex_lock(&mtx);
pthread_cond_wait(&cond,&mtx);
//pthread
printf("10 times complete.\n");
//pthread
pthread_mutex_unlock(&mtx);
}
}
int main(void *arg)
{
pthread_t tid;
pthread_create(&tid,NULL,thread_func,NULL);
//sleep(5);
int i=50;
while(i--)
{
sleep(2);
pthread_mutex_lock(&mtx);
printf("100 times complete!.\n");
pthread_cond_signal(&cond);
pthread_mutex_unlock(&mtx);
}
//pthread_join(tid,NULL);
//pthread_cancel(tid);
pthread_join(tid,NULL);
}