id_tracker.h

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#pragma once
 
#include "fl/stl/flat_map.h"
#include "fl/stl/mutex.h"
#include "fl/stl/noexcept.h"
namespace fl {

class IdTracker {
public:
    IdTracker() FL_NO_EXCEPT = default;

    int getOrCreateId(void* ptr) FL_NO_EXCEPT;

    bool getId(void* ptr, int* outId) FL_NO_EXCEPT;

    bool removeId(void* ptr) FL_NO_EXCEPT;

    size_t size() FL_NO_EXCEPT;

    void clear() FL_NO_EXCEPT;
 
    // Non-copyable and non-movable for thread safety
    // (Each instance should have its own independent state)
    IdTracker(const IdTracker&) FL_NO_EXCEPT = delete;
    IdTracker& operator=(const IdTracker&) FL_NO_EXCEPT = delete;
    IdTracker(IdTracker&&) FL_NO_EXCEPT = delete;
    IdTracker& operator=(IdTracker&&) FL_NO_EXCEPT = delete;
 
private:
 
    // Thread synchronization
    mutable fl::mutex mMutex;
 
    // ID mapping and counter
    fl::flat_map<void*, int> mPointerToId;
    int mNextId = 0;  // Start IDs at 0 to match StripIdMap behavior
};
 
} // namespace fl