C++11简易线程池

#include<iostream>
#include<functional>
#include<thread>
#include<condition_variable>
#include<mutex>
#include<queue>
#define ThreadNum 555
#define POOL P
using namespace std;
void func(int);
class P
{
public:
P()
{
isRunning = true;
for (int i = 0; i<ThreadNum; i++)
{
    threads.emplace([this,i]()
  {
std::cout << i << std::endl;
while (isRunning)
{
std::unique_lock<std::mutex>lk(mtx);
cv.wait(lk, [this](){return  isRunning && !tasks.empty(); });
Task nowTask =std::move(tasks.front());
tasks.pop();
nowTask();
}


; });
}
}
~P()
{
while (!threads.empty())
{
std::thread t = std::move(threads.front());
if (t.joinable())
{
t.join();
};
}
}
void commit(int id)
{
Task newtask = std::bind(func,id);
std::lock_guard < std::mutex>lk(mtx);
tasks.emplace(newtask);
cv.notify_one();
}
void stop()
{
std::unique_lock<std::mutex>lk(mtx);
isRunning = false;
}

private:
std::mutex mtx;
std::condition_variable cv;
using Task = std::function<void(void)>;
using WorkThread = std::thread;
std::queue<Task>tasks;
bool isRunning;
std::queue<WorkThread>threads;


};
void func(int id)
{

printf("%d\n", id);
}


int main()
{
POOL p;
for (int i = 0; i < 10; i++)
{
p.commit(i);
}
//cin.get();

}