Work on the spectran HTTP source

core/src/utils/new_event.h

@@ -0,0 +1,51 @@
+#pragma once
+#include <functional>
+#include <stdexcept>
+#include <mutex>
+#include <map>
+
+typedef int HandlerID;
+
+template <typename... Args>
+class NewEvent {
+    using Handler = std::function<void(Args...)>;
+public:
+    HandlerID bind(const Handler& handler) {
+        std::lock_guard<std::mutex> lck(mtx);
+        HandlerID id = genID();
+        handlers[id] = handler;
+        return id;
+    }
+
+    template<typename MHandler, class T>
+    HandlerID bind(MHandler handler, T* ctx) {
+        return bind([=](Args... args){
+            (ctx->*handler)(args...);
+        });
+    }
+
+    void unbind(HandlerID id) {
+        std::lock_guard<std::mutex> lck(mtx);
+        if (handlers.find(id) == handlers.end()) {
+            throw std::runtime_error("Could not unbind handler, unknown ID");
+        }
+        handlers.erase(id);
+    }
+
+    void operator()(Args... args) {
+        std::lock_guard<std::mutex> lck(mtx);
+        for (const auto& [desc, handler] : handlers) {
+            handler(args...);
+        }
+    }
+
+private:
+    HandlerID genID() {
+        int id;
+        for (id = 1; handlers.find(id) != handlers.end(); id++);
+        return id;
+    }
+
+    std::map<HandlerID, Handler> handlers;
+    std::mutex mtx;
+};