blob: abdc0f8a8fb55a84ef8e6e33d88a69ad084f38fe (
plain)
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
|
#pragma once
#include "Program.hpp"
#include <thread>
#include <future>
namespace QuickMedia {
template <typename T>
class AsyncTask {
public:
using CallbackFunc = std::function<T()>;
AsyncTask() = default;
AsyncTask(CallbackFunc callback_func) {
std::promise<T> promise;
future = promise.get_future();
thread = std::thread(&AsyncTask::thread_handler, this, std::move(promise), std::move(callback_func));
}
AsyncTask& operator=(CallbackFunc callback_func) {
cancel();
std::promise<T> promise;
future = promise.get_future();
thread = std::thread(&AsyncTask::thread_handler, this, std::move(promise), std::move(callback_func));
return *this;
}
AsyncTask(AsyncTask &&other) {
cancel();
thread = std::move(other.thread);
future = std::move(other.future);
}
AsyncTask& operator=(AsyncTask &&other) {
cancel();
thread = std::move(other.thread);
future = std::move(other.future);
return *this;
}
~AsyncTask() {
cancel();
}
bool valid() {
return future.valid();
}
bool ready() {
return future.valid() && future.wait_for(std::chrono::seconds(0)) == std::future_status::ready;
}
T get() {
thread.join();
return future.get();
}
void cancel() {
if(valid()) {
program_kill_in_thread(thread.get_id());
get();
}
}
private:
void thread_handler(std::promise<T> &&promise, CallbackFunc callback_func) {
if constexpr(std::is_same<T, void>::value) {
callback_func();
promise.set_value();
} else {
promise.set_value(callback_func());
}
}
private:
std::thread thread;
std::future<T> future;
};
}
|
