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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#pragma once
#include <functional>
#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 {
typedef std::function<void(void)> WorkItem;
/*
* Handles communication of events between the system's state machines. Each
* event will be dispatched separately to each FSM, on the correct task for
* that FSM.
*/
class EventQueue {
public:
static EventQueue& GetInstance() {
static EventQueue instance;
return instance;
}
template <typename Event>
auto DispatchFromISR(const Event& ev) -> bool {
WorkItem* item = new WorkItem([=]() {
tinyfsm::FsmList<system_fsm::SystemState>::template dispatch<Event>(ev);
});
BaseType_t ret;
xQueueSendFromISR(system_handle_, &item, &ret);
return ret;
}
template <typename Event, typename Machine, typename... Machines>
auto Dispatch(const Event& ev) -> void {
WorkItem* item = new WorkItem(
[=]() { tinyfsm::FsmList<Machine>::template dispatch<Event>(ev); });
if (std::is_same<Machine, ui::UiState>()) {
xQueueSend(ui_handle_, &item, portMAX_DELAY);
} else if (std::is_same<Machine, audio::AudioState>()) {
xQueueSend(audio_handle_, &item, portMAX_DELAY);
} else {
xQueueSend(system_handle_, &item, portMAX_DELAY);
}
Dispatch<Event, Machines...>(ev);
}
template <typename Event>
auto Dispatch(const Event& ev) -> void {}
auto ServiceSystem(TickType_t max_wait_time) -> bool;
auto ServiceUi(TickType_t max_wait_time) -> bool;
auto ServiceAudio(TickType_t max_wait_time) -> bool;
EventQueue(EventQueue const&) = delete;
void operator=(EventQueue const&) = delete;
private:
EventQueue();
QueueHandle_t system_handle_;
QueueHandle_t ui_handle_;
QueueHandle_t audio_handle_;
};
template <typename Event, typename... Machines>
auto Dispatch(const Event& ev) -> void {
EventQueue& queue = EventQueue::GetInstance();
queue.Dispatch<Event, Machines...>(ev);
}
} // namespace events
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