Introduce helper classes

src/gdb-stub/async_handler.cpp

@@ -0,0 +1,77 @@
+#include "async_handler.hpp"
+#include <utils/finally.hpp>
+
+using namespace std::chrono_literals;
+
+namespace gdb_stub
+{
+    async_handler::async_handler(handler_function h)
+        : handler_(std::move(h))
+    {
+        this->stop_ = false;
+    }
+
+    async_handler::~async_handler()
+    {
+        this->stop_ = true;
+        this->run_ = false;
+
+        if (this->runner_.joinable())
+        {
+            this->runner_.join();
+        }
+    }
+
+    void async_handler::pause()
+    {
+        this->run_ = false;
+
+        while (this->is_running_ && !this->stop_)
+        {
+            std::this_thread::sleep_for(1ms);
+        }
+    }
+
+    void async_handler::run()
+    {
+        if (this->stop_)
+        {
+            return;
+        }
+
+        this->run_ = true;
+
+        while (!this->is_running_ && !this->stop_)
+        {
+            std::this_thread::sleep_for(1ms);
+        }
+    }
+
+    bool async_handler::is_running() const
+    {
+        return this->is_running_;
+    }
+
+    void async_handler::work()
+    {
+        while (true)
+        {
+            while (!this->run_ && !this->stop_)
+            {
+                std::this_thread::sleep_for(10ms);
+            }
+
+            if (this->stop_)
+            {
+                break;
+            }
+
+            const auto _ = utils::finally([this] {
+                this->is_running_ = false; //
+            });
+
+            this->is_running_ = true;
+            this->handler_(this->run_);
+        }
+    }
+}