From bf0a28918f8c4acea0b43947f3ccede0b32dba2d Mon Sep 17 00:00:00 2001
From: Jochen Vothknecht <jochen3120@gmail.com>
Date: Thu, 21 Apr 2022 11:21:31 +0200
Subject: [PATCH] Adding generic callback-thingy
---
CLC-qthing/SpiderLib/Callback.hpp | 59 +++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
create mode 100644 CLC-qthing/SpiderLib/Callback.hpp
diff --git a/CLC-qthing/SpiderLib/Callback.hpp b/CLC-qthing/SpiderLib/Callback.hpp
new file mode 100644
index 0000000..658b183
--- /dev/null
+++ b/CLC-qthing/SpiderLib/Callback.hpp
@@ -0,0 +1,59 @@
+#pragma once
+
+// C++ system level
+// #include <cstring> // memset, strncmp
+// #include <cstdlib> // TODO: is this for memcpy?
+// #include <cinttypes>
+#include <functional>
+
+// ESP32 specific
+// #include "esp_log.h"
+
+// project specific
+// #include "CyanBusCRC.hpp"
+
+// qthing stuff
+// #include ""
+
+
+namespace SpiderLib {
+
+ // Forward declaration
+ template <class>
+ class Callback;
+
+
+ template <typename... Args>
+ class Callback<void(Args...)> {
+
+ public:
+ typedef std::function<void(Args...)> CallbackF;
+
+ Callback() : callback(NULL) {};
+
+ void operator()(Args&&... args) {
+ if (callback != NULL) callback(std::forward<Args>(args)...);
+ }
+
+ auto& operator+=(const CallbackF& newCB) {
+ add(newCB);
+ return *this;
+ }
+
+ void add(CallbackF newCB) {
+ if (callback == NULL) {
+ callback = newCB;
+ } else {
+ auto oldCB = callback;
+ callback = [&](Args&&... args) {
+ oldCB(std::forward<Args>(args)...);
+ newCB(std::forward<Args>(args)...);
+ };
+ }
+ }
+
+ private:
+ CallbackF callback = NULL;
+ };
+
+}
--
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