blob: 0298e88e4de168b1e94ff29fe8c6b456c61d02a9 (
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
|
// Multi-threaded test program for testing frame providers.
#include <condition_variable>
#include <iostream>
#include <mutex>
#include <thread>
std::mutex mtx;
std::condition_variable cv;
int ready_count = 0;
constexpr int NUM_THREADS = 2;
void thread_func(int thread_num) {
std::cout << "Thread " << thread_num << " started\n";
{
std::unique_lock<std::mutex> lock(mtx);
ready_count++;
if (ready_count == NUM_THREADS + 1) {
cv.notify_all();
} else {
cv.wait(lock, [] { return ready_count == NUM_THREADS + 1; });
}
}
std::cout << "Thread " << thread_num << " at breakpoint\n"; // Break here.
}
int main(int argc, char **argv) {
std::thread threads[NUM_THREADS];
for (int i = 0; i < NUM_THREADS; i++) {
threads[i] = std::thread(thread_func, i);
}
{
std::unique_lock<std::mutex> lock(mtx);
ready_count++;
if (ready_count == NUM_THREADS + 1) {
cv.notify_all();
} else {
cv.wait(lock, [] { return ready_count == NUM_THREADS + 1; });
}
}
std::cout << "Main thread at barrier\n";
for (int i = 0; i < NUM_THREADS; i++)
threads[i].join();
std::cout << "All threads completed\n";
return 0;
}
|
