C++ Multithreading

mutex_condition.cpp

#include <thread>
#include <mutex>
#include <condition_variable>


std::mutex g_mut;
std::condition_variable g_newMsgCondition;

void AddNewDlgMessage(const std::wstring& t)
{
	std::lock_guard<std::mutex> lk(g_mut);
	g_msg.push_back(t);
	g_newMsgCondition.notify_one();
}

void UIDlgThread()
{
	while(true)
	{
		std::unique_lock<std::mutex> lk(g_mut);
		g_newMsgCondition.wait(lk, []{return !g_msg.empty() || g_procedureFinished;});

		if(g_msg.empty() && g_procedureFinished)
			break;

		ExtractTextTitleAndBody(g_msg.front(), g_DlgTitle, g_DlgText);
		g_msg.erase(g_msg.begin()); 

		lk.unlock();

		DialogBox(g_hInst, MAKEINTRESOURCE(IDD_MAINDIALOG), NULL, DialogProc);
	}
}