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
|
// atomic::operator=/operator T example:
#include <iostream> // std::cout
#include <atomic> // std::atomic
#include <thread> // std::thread, std::this_thread::yield
std::atomic<int> foo = 0;
std::atomic<int> bar = 0;
void set_foo(int x) {
foo = x;
}
void copy_foo_to_bar () {
while (foo==0) std::this_thread::yield();
bar = static_cast<int>(foo);
}
void print_bar() {
while (bar==0) std::this_thread::yield();
std::cout << "bar: " << bar << '\n';
}
int main ()
{
std::thread first (print_bar);
std::thread second (set_foo,10);
std::thread third (copy_foo_to_bar);
first.join();
second.join();
third.join();
return 0;
}
| |