/*
 * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef VARIABLES_VIEW_STATE_HISTORY_H
#define VARIABLES_VIEW_STATE_HISTORY_H


#include <util/OpenHashTable.h>


class FunctionID;
class VariablesViewState;


class VariablesViewStateHistory {
public:
                                                                VariablesViewStateHistory();
        virtual                                         ~VariablesViewStateHistory();

                        status_t                        Init();

                        VariablesViewState*     GetState(thread_id threadID,
                                                                        FunctionID* functionID) const;
                        VariablesViewState*     GetState(FunctionID* functionID) const;

                        status_t                        SetState(thread_id threadID,
                                                                        FunctionID* functionID,
                                                                        VariablesViewState* state);

private:
                        struct Key;
                        struct StateEntry;
                        struct StateEntryHashDefinition;

                        typedef BOpenHashTable<StateEntryHashDefinition> StateTable;

private:
                        StateTable*                     fStates;
};


#endif  // VARIABLES_VIEW_STATE_HISTORY_H