blob: 461c775d2236874644bed36549e38c46b9fbc557 (
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
|
#include <iostream>
#include <mutex>
#include <thread>
int main() {
int turn = 1;
int count = 0;
std::mutex mutex;
auto thread_proc1 = [&] {
while (true) {
{
std::lock_guard<std::mutex> guard(mutex);
if (count >= 10)
break;
if (turn == 1) {
std::cout << "A" << std::endl;
turn = 2;
}
}
std::this_thread::yield();
}
};
auto thread_proc2 = [&] {
while (true) {
{
std::lock_guard<std::mutex> guard(mutex);
if (count >= 10)
break;
if (turn == 2) {
std::cout << "B" << std::endl;
turn = 3;
}
}
std::this_thread::yield();
}
};
auto thread_proc3 = [&] {
while (true) {
{
std::lock_guard<std::mutex> guard(mutex);
if (count >= 10)
break;
if (turn == 3) {
std::cout << "C" << std::endl;
turn = 1;
count++;
}
}
std::this_thread::yield();
}
};
std::thread thread1(thread_proc1);
std::thread thread2(thread_proc2);
std::thread thread3(thread_proc3);
thread1.join();
thread2.join();
thread3.join();
return 0;
}
|
