일단 거의 모든 버그 다 고칢..

impl/Utils/ThreadPool.cpp

@@ -11,11 +11,7 @@ ThreadPool::ThreadPool(std::uint32_t numThreads) {
 }
 
 ThreadPool::~ThreadPool() {
-	terminate_ = true;
-	jobQueueCV_.notify_all();
-
-	for (auto& t : workers_)
-		t.join();
+	terminate();
 }
 
 void ThreadPool::init(std::uint32_t numThreads) {
@@ -29,12 +25,36 @@ void ThreadPool::init(std::uint32_t numThreads) {
 		numCPU = sysconf(_SC_NPROCESSORS_ONLN);
 #endif
 		spdlog::info("Auto-detected cpu count: {}", numCPU);
-		spdlog::info("Set ThreadPool Worker count to: {}", numCPU);
+		if (numCPU == 1 || numCPU == 2) {
+			numCPU = 4;
+			spdlog::info("Set ThreadPool Worker count to: {} due to program to oprate concurrently", numCPU);
+		}
+		else {
+			spdlog::info("Set ThreadPool Worker count to: {}", numCPU);
+		}
 	}
+	threadCount = numCPU;
 	workers_.reserve(numCPU);
 
 	while (numCPU--)
-		workers_.push_back([this]() { this->Worker(); });
+		workers_.push_back([this]() {
+			this->Worker();
+		});
+}
+
+void ThreadPool::terminate() {
+	terminate_ = true;
+	jobQueueCV_.notify_all();
+
+	spdlog::debug("waiting for threads to end their jobs...");
+	for (auto& t : workers_)
+		t.join();
+}
+
+void ThreadPool::respawnWorker(std::uint32_t numThreads) {
+	terminate();
+	terminate_ = false;
+	init(numThreads);
 }
 
 void* ThreadPool::Worker() {
@@ -43,18 +63,17 @@ void* ThreadPool::Worker() {
 #elif __linux__
 	pthread_t pid = pthread_self();
 #endif
-	spdlog::info("ThreadPool Worker : {} up.", pid);
 	while (!terminate_) {
 		std::unique_lock<std::mutex> lock(jobQueueMutex);
 		jobQueueCV_.wait(lock, [this]() { return !this->jobs_.empty() || terminate_; });
 		if (this->jobs_.empty())
-			return nullptr;
+			break;
 
 		auto job = std::move(jobs_.front());
 		jobs_.pop();
 		lock.unlock();
 
-		spdlog::info("ThreadPool Worker : {} Executing a job", pid);
+		spdlog::debug("ThreadPool Worker : {} Executing a job", pid);
 		job();
 	}