c++实现简单的定时器

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#include <iostream>
#include <thread>
#include <unistd.h>
class Object;
typedef void(Object::*SayHi)();
typedef void(Object::*CallaterHandler)();
void threadFunc(Object *target,CallaterHandler handler,int delay){
sleep(delay);
(target->*handler)();
}
void callater(Object *target,CallaterHandler handler,int delay){
std::thread t(threadFunc,target,handler,delay);
t.join();
}
#define CH(fp) (CallaterHandler)(&fp)
class Object {
public:
SayHi sayHi;
};
class Hello:public Object {
public:
Hello(){
// sayHi = (SayHi)(&Hello::HelloSayHi);
//
// (this->*sayHi)();
callater(this, CH(Hello::HelloSayHi), 3);
}
void HelloSayHi(){
printf("Hello CPP\n");
}
};
int main(int argc, const char * argv[])
{
Hello *h = new Hello();
delete h;
// insert code here...
std::cout << "Hello, World!\n";
return 0;
}