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ContextWorker.h
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ContextWorker.h
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#pragma once
#include <thread>
#include <functional>
#include "Semaphore.h"
//enum TemplatedWorkerState {
// IDLE, RUNNING, STOPPED
//};
template<class ContextType>
class ContextWorker {
public:
ContextWorker(const size_t &id) : id(id) {
mainThread = workerThread();
}
~ContextWorker() {
if (mainThread.joinable()) {
join();
}
}
void assignTask(std::shared_ptr<std::function<void(ContextType)>> task) {
currentTask = task;
runTask();
}
const size_t getId() {
return id;
}
void stop() {
state = STOPPED;
mainSemaphore.unlock();
}
void join() {
mainThread.join();
}
void detach() {
mainThread.detach();
}
void onIdle(const std::shared_ptr<std::function<void(ContextWorker *worker)>> &callback) {
onIdleCallback = callback;
}
void onStop(const std::shared_ptr<std::function<void(ContextWorker *worker)>> &callback) {
onStopCallback = callback;
}
WorkerState state = IDLE;
ContextType context;
const std::size_t id;
protected:
virtual std::thread workerThread() {
return std::thread([&] {
while (state != STOPPED) {
mainSemaphore.lock();
if(currentTask == nullptr){
continue;
}
if (state == STOPPED) {
fireStopCallback();
return;
}
currentTask->operator()(context);
currentTask = nullptr;
state = IDLE;
fireIdleCallback();
}
});
}
void runTask() {
state = RUNNING;
mainSemaphore.unlock();
}
void fireStopCallback() {
if (onStopCallback != nullptr) {
onStopCallback->operator()(this);
}
}
void fireIdleCallback() {
if (onIdleCallback != nullptr) {
onIdleCallback->operator()(this);
}
}
Semaphore mainSemaphore;
std::thread mainThread;
std::shared_ptr<std::function<void(ContextType context)>> currentTask;
std::shared_ptr<std::function<void(ContextWorker *worker)>> onIdleCallback;
std::shared_ptr<std::function<void(ContextWorker *worker)>> onStopCallback;
};