Program Listing for File object-map.h

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#pragma once

#include <cstdint>
#include <unordered_map>
#include <functional>

namespace gpa {
namespace playback {

class ObjectMap
{
public:
    ObjectMap();
    ~ObjectMap();

    typedef uint64_t Key;
    typedef void* ObjectRef;
    typedef uint64_t Timestamp;
    struct ObjectEntry
    {
        ObjectRef ref;
        Timestamp timestamp;
    };

    ObjectRef AcquireObject(Key key) const;

    void SetObjectMapping(Key key, ObjectRef value);

    size_t Size() const;

    void Clear();

    void Enumerate(std::function<void(Key, ObjectRef, Timestamp)> callback) const;

private:
    // Use a non-thread safe unordered map for now, since playback (the use case)
    // is single threaded.
    std::unordered_map<Key, ObjectEntry> mObjectMap;
};

}  // namespace playback
}  // namespace gpa