blob: db72563a8ea8cd244f32946c1ce8a6fc005910e3 (
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
|
#include <boost/asio/ts/executor.hpp>
#include <boost/asio/thread_pool.hpp>
#include <iostream>
#include <string>
using boost::asio::bind_executor;
using boost::asio::dispatch;
using boost::asio::make_work_guard;
using boost::asio::post;
using boost::asio::thread_pool;
// A function to asynchronously read a single line from an input stream.
template <class Handler>
void async_getline(std::istream& is, Handler handler)
{
// Create executor_work for the handler's associated executor.
auto work = make_work_guard(handler);
// Post a function object to do the work asynchronously.
post([&is, work, handler=std::move(handler)]() mutable
{
std::string line;
std::getline(is, line);
// Pass the result to the handler, via the associated executor.
dispatch(work.get_executor(),
[line=std::move(line), handler=std::move(handler)]() mutable
{
handler(std::move(line));
});
});
}
int main()
{
thread_pool pool;
std::cout << "Enter a line: ";
async_getline(std::cin,
bind_executor(pool, [](std::string line)
{
std::cout << "Line: " << line << "\n";
}));
pool.join();
}
|
