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-rw-r--r--3rdparty/asio/src/examples/cpp14/executors/async_2.cpp61
1 files changed, 37 insertions, 24 deletions
diff --git a/3rdparty/asio/src/examples/cpp14/executors/async_2.cpp b/3rdparty/asio/src/examples/cpp14/executors/async_2.cpp
index b39156dcb23..b8a28e68b87 100644
--- a/3rdparty/asio/src/examples/cpp14/executors/async_2.cpp
+++ b/3rdparty/asio/src/examples/cpp14/executors/async_2.cpp
@@ -1,30 +1,35 @@
-#include <asio/ts/executor.hpp>
-#include <asio/thread_pool.hpp>
+#include <asio/associated_executor.hpp>
+#include <asio/bind_executor.hpp>
+#include <asio/execution.hpp>
+#include <asio/static_thread_pool.hpp>
#include <iostream>
#include <string>
using asio::bind_executor;
-using asio::dispatch;
using asio::get_associated_executor;
-using asio::make_work_guard;
-using asio::post;
-using asio::thread_pool;
+using asio::static_thread_pool;
+namespace execution = asio::execution;
// A function to asynchronously read a single line from an input stream.
-template <class Handler>
-void async_getline(std::istream& is, Handler handler)
+template <class IoExecutor, class Handler>
+void async_getline(IoExecutor io_ex, std::istream& is, Handler handler)
{
- // Create executor_work for the handler's associated executor.
- auto work = make_work_guard(handler);
+ // Track work for the handler's associated executor.
+ auto work_ex = asio::prefer(
+ get_associated_executor(handler, io_ex),
+ execution::outstanding_work.tracked);
// Post a function object to do the work asynchronously.
- post([&is, work, handler=std::move(handler)]() mutable
+ execution::execute(
+ asio::require(io_ex, execution::blocking.never),
+ [&is, work_ex, 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(),
+ execution::execute(
+ asio::prefer(work_ex, execution::blocking.possibly),
[line=std::move(line), handler=std::move(handler)]() mutable
{
handler(std::move(line));
@@ -33,36 +38,44 @@ void async_getline(std::istream& is, Handler handler)
}
// A function to asynchronously read multiple lines from an input stream.
-template <class Handler>
-void async_getlines(std::istream& is, std::string init, Handler handler)
+template <class IoExecutor, class Handler>
+void async_getlines(IoExecutor io_ex, std::istream& is, std::string init, Handler handler)
{
- // Get the final handler's associated executor.
- auto ex = get_associated_executor(handler);
+ // Track work for the I/O executor.
+ auto io_work_ex = asio::prefer(io_ex,
+ execution::outstanding_work.tracked);
+
+ // Track work for the handler's associated executor.
+ auto handler_work_ex = asio::prefer(
+ get_associated_executor(handler, io_ex),
+ execution::outstanding_work.tracked);
// Use the associated executor for each operation in the composition.
- async_getline(is,
- bind_executor(ex,
- [&is, lines=std::move(init), handler=std::move(handler)]
+ async_getline(io_work_ex, is,
+ bind_executor(handler_work_ex,
+ [io_work_ex, &is, lines=std::move(init), handler=std::move(handler)]
(std::string line) mutable
{
if (line.empty())
handler(lines);
else
- async_getlines(is, lines + line + "\n", std::move(handler));
+ async_getlines(io_work_ex, is, lines + line + "\n", std::move(handler));
}));
}
int main()
{
- thread_pool pool;
+ static_thread_pool io_pool(1);
+ static_thread_pool completion_pool(1);
std::cout << "Enter text, terminating with a blank line:\n";
- async_getlines(std::cin, "",
- bind_executor(pool, [](std::string lines)
+ async_getlines(io_pool.executor(), std::cin, "",
+ bind_executor(completion_pool.executor(), [](std::string lines)
{
std::cout << "Lines:\n" << lines << "\n";
}));
- pool.join();
+ io_pool.wait();
+ completion_pool.wait();
}