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Improved Periodic class #9501

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Improved Periodic class #9501

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17 changes: 11 additions & 6 deletions src/concurrency/Periodic.h
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Original file line number Diff line number Diff line change
@@ -1,24 +1,29 @@
#pragma once

#include <utility>
#include <functional>

#include "concurrency/OSThread.h"

namespace concurrency
{

/**
* @brief Periodically invoke a callback. This just provides C-style callback conventions
* rather than a virtual function - FIXME, remove?
* @brief Periodically invoke a callback.
* Supports both legacy function pointers and modern callables.
*/
class Periodic : public OSThread
{
int32_t (*callback)();

public:
// callback returns the period for the next callback invocation (or 0 if we should no longer be called)
Periodic(const char *name, int32_t (*_callback)()) : OSThread(name), callback(_callback) {}
Periodic(const char *name, int32_t (*cb)()) : OSThread(name), callback(cb) {}
Periodic(const char *name, std::function<int32_t()> cb) : OSThread(name), callback(std::move(cb)) {}

protected:
int32_t runOnce() override { return callback(); }
int32_t runOnce() override { return callback ? callback() : 0; }

private:
std::function<int32_t()> callback;
};

} // namespace concurrency