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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 {
/** @file
* This header provides an interface and simple implementation for a task
* runner. Another threaded, serial implementation using a queue is available in
* the scheduler module's SerialTaskRunner.
*/
class TaskRunnerInterface
{
public:
virtual ~TaskRunnerInterface() {}
/**
* The callback can either be queued for later/asynchronous/threaded
* processing, or be executed immediately for synchronous processing.
*/
virtual void insert(std::function<void()> func) = 0;
/**
* Forces the processing of all pending events.
*/
virtual void flush() = 0;
/**
* Returns the number of currently pending events.
*/
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
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