Hook system PoC

src/port/hooks/impl/EventSystem.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef uint16_t EventID;
+
+typedef enum EventType {
+    EVENT_TYPE_PRE,
+    EVENT_TYPE_NORMAL,
+    EVENT_TYPE_POST,
+} EventType;
+
+typedef enum EventPriority {
+    EVENT_PRIORITY_LOW,
+    EVENT_PRIORITY_NORMAL,
+    EVENT_PRIORITY_HIGH,
+} EventPriority;
+
+typedef struct IEvent {
+    bool cancelled;
+} IEvent;
+
+typedef void (*EventCallback)(IEvent*);
+
+// ID             Type
+// 00000000000000 00
+#define EVENT_ID(id, type) ((id << 2) | type)
+
+#ifdef __cplusplus
+#include <array>
+#include <vector>
+
+class EventSystem {
+public:
+    static EventSystem* Instance;
+    size_t RegisterListener(EventID id, EventPriority priority, EventCallback callback);
+    void CallEvent(EventID id, IEvent* event);
+private:
+    std::array<std::vector<EventCallback>, 0xFFFF> mEventListeners;
+};
+#else
+extern size_t EventSystem_RegisterListener(EventID id, EventPriority priority, EventCallback callback);
+extern void EventSystem_CallEvent(EventID id, void* event);
+#endif