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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#pragma once
#include <functional>
#include <mutex>
#include <queue>
#include <type_traits>
#include "audio_fsm.hpp"
#include "freertos/FreeRTOS.h"
#include "freertos/portmacro.h"
#include "freertos/queue.h"
#include "system_fsm.hpp"
#include "tinyfsm.hpp"
#include "ui_fsm.hpp"
namespace events {
class Queue {
public:
Queue() : has_events_(xSemaphoreCreateBinary()), mut_(), events_() {}
auto Add(std::function<void(void)> fn) {
{
std::lock_guard<std::mutex> lock{mut_};
events_.push(fn);
}
xSemaphoreGive(has_events_);
}
auto Service(TickType_t max_wait) -> bool {
bool res = xSemaphoreTake(has_events_, max_wait);
if (!res) {
return false;
}
bool had_work = false;
for (;;) {
std::function<void(void)> fn;
{
std::lock_guard<std::mutex> lock{mut_};
if (events_.empty()) {
return had_work;
}
had_work = true;
fn = events_.front();
events_.pop();
}
std::invoke(fn);
}
}
auto has_events() -> SemaphoreHandle_t { return has_events_; }
Queue(Queue const&) = delete;
void operator=(Queue const&) = delete;
private:
SemaphoreHandle_t has_events_;
std::mutex mut_;
std::queue<std::function<void(void)>> events_;
};
template <class Machine>
class Dispatcher {
public:
Dispatcher(Queue* queue) : queue_(queue) {}
template <typename Event>
auto Dispatch(const Event& ev) -> void {
auto dispatch_fn = [=]() {
tinyfsm::FsmList<Machine>::template dispatch<Event>(ev);
};
queue_->Add(dispatch_fn);
}
Dispatcher(Dispatcher const&) = delete;
void operator=(Dispatcher const&) = delete;
private:
Queue* queue_;
};
namespace queues {
auto SystemAndAudio() -> Queue*;
auto Ui() -> Queue*;
} // namespace queues
auto System() -> Dispatcher<system_fsm::SystemState>&;
auto Audio() -> Dispatcher<audio::AudioState>&;
auto Ui() -> Dispatcher<ui::UiState>&;
} // namespace events
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