定时器的实现

使用 C++ 线程库的超时操作

/* * 定时器的实现 */#include <thread>#include <mutex>#include <condition_variable>#include <chrono>#include <time.h>#include <stdio.h>using namespace std;int main (){    condition_variable_any cv;    mutex mx;    time_t t;    time_t t2;    puts("Hello");    time(&t);    cv.wait_for(mx, chrono::seconds(5));    time(&t2);    printf("wait for %.lf sec\n", difftime(t2, t));    puts("world");    return 0;}