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
|
/*
* Copyright (c) 2020 Samsung Electronics Co., Ltd. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef VTASKQUEUE_H
#define VTASKQUEUE_H
#include <deque>
template <typename Task>
class TaskQueue {
using lock_t = std::unique_lock<std::mutex>;
std::deque<Task> _q;
bool _done{false};
std::mutex _mutex;
std::condition_variable _ready;
public:
bool try_pop(Task &task)
{
lock_t lock{_mutex, std::try_to_lock};
if (!lock || _q.empty()) return false;
task = std::move(_q.front());
_q.pop_front();
return true;
}
bool try_push(Task &&task)
{
{
lock_t lock{_mutex, std::try_to_lock};
if (!lock) return false;
_q.push_back(std::move(task));
}
_ready.notify_one();
return true;
}
void done()
{
{
lock_t lock{_mutex};
_done = true;
}
_ready.notify_all();
}
bool pop(Task &task)
{
lock_t lock{_mutex};
while (_q.empty() && !_done) _ready.wait(lock);
if (_q.empty()) return false;
task = std::move(_q.front());
_q.pop_front();
return true;
}
void push(Task &&task)
{
{
lock_t lock{_mutex};
_q.push_back(std::move(task));
}
_ready.notify_one();
}
};
#endif // VTASKQUEUE_H
|
