-
Notifications
You must be signed in to change notification settings - Fork 0
/
ThreadPool.hpp
87 lines (78 loc) · 2.37 KB
/
ThreadPool.hpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
#ifndef _THREAD_POOL
#define _THREAD_POOL
#include <vector>
#include <thread>
#include <mutex>
#include <condition_variable>
#include <queue>
namespace Fang
{
class noncopyable{
public:
noncopyable(noncopyable&) = delete;
noncopyable& operator=(noncopyable&) = delete;
protected:
noncopyable() = default;
~noncopyable() = default;
};
class ThreadPool : noncopyable {
public:
explicit ThreadPool(std::size_t n);
~ThreadPool();
template<typename FUNC, typename... ARGS> void insert_task(FUNC&& func, ARGS&&... args);
void join();
private:
std::vector<std::thread> workers_;
std::queue<std::function<void()>> tasks_;
std::mutex qmutex_;
std::condition_variable cv_;
bool stop_;
};
} // namespace Fang
namespace Fang
{
ThreadPool::ThreadPool(size_t n): stop_(false) {
for (int i=0; i<n; ++i) {
workers_.emplace_back([this]{
while(true) {
std::function<void()> task;
{
std::unique_lock<std::mutex> lock(qmutex_);
cv_.wait(lock, [this]{return this->stop_ || !this->tasks_.empty();});
if (this->stop_ && this->tasks_.empty()) {
return;
}
task = std::move(this->tasks_.front());
this->tasks_.pop();
}
task();
}
});
}
}
template<typename FUNC, typename... ARGS>
void ThreadPool::insert_task(FUNC &&func, ARGS&&... args) {
auto f = std::bind(std::forward<FUNC>(func), std::forward<ARGS>(args)...);
{
std::unique_lock<std::mutex> lock(qmutex_);
if (stop_) {
throw std::runtime_error("insert task into a stoped threadpool.");
}
tasks_.emplace([f]{f();});
cv_.notify_one();
}
}
void ThreadPool::join(){
{
std::unique_lock<std::mutex> lock;
stop_ = true;
}
cv_.notify_all();
for (auto& w: workers_)
w.join();
}
ThreadPool::~ThreadPool() {
join();
}
} // namespace Fang
#endif // #ifndef _THREAD_POOL