task_runner.h

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// Copyright (c) 2024-present The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_UTIL_TASK_RUNNER_H
#define BITCOIN_UTIL_TASK_RUNNER_H

#include <cstddef>
#include <functional>

namespace util {

class TaskRunnerInterface
{
public:
    virtual ~TaskRunnerInterface() = default;

    virtual void insert(std::function<void()> func) = 0;

    virtual void flush() = 0;

    virtual size_t size() = 0;
};

class ImmediateTaskRunner : public TaskRunnerInterface
{
public:
    void insert(std::function<void()> func) override { func(); }
    void flush() override {}
    size_t size() override { return 0; }
};

} // namespace util

#endif // BITCOIN_UTIL_TASK_RUNNER_H