Что такое сигнальное состояние в мьютексах,семафорах и т.д?

#include "stdafx.h"
#include <conio.h>
#include <iostream>
#include <Windows.h>
 
using namespace std;
 
#define get_pause() cout << "Press any key to continue..." << endl; getch() 
 
HANDLE hOutEvent;
HANDLE hAddEvent;
 
DWORD WINAPI thread_f(LPVOID)
{
    for (int i = 0; i < 10; i++)
    {
        cout << i << endl;
        if (i == 4)
        {
            SetEvent(hOutEvent);
            WaitForSingleObject(hOutEvent, INFINITE);
        }
    }
    return 0;
}
 
int main()
{
    HANDLE hThread;
    DWORD IDThread;
 
    hOutEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
    if (!hOutEvent)
    {
        cout << "Error of creating event..." << endl; 
        get_pause();
        return GetLastError();
    }
 
    hAddEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
    if (!hAddEvent)
    {
        cout << "Error of creating second event..." << endl;
        get_pause();
        return GetLastError();
    }
 
    hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)thread_f, NULL, 0, &IDThread);
    if (!hThread)
    {
        cout << "Error of creating thread..." << endl;
        get_pause();
        return GetLastError();
    }
 
    WaitForSingleObject(hOutEvent, INFINITE);
 
    cout << "A half of the work has been done" << endl;
    get_pause();
 
    SetEvent(hAddEvent);
 
    WaitForSingleObject(hThread, INFINITE);
 
    get_pause();
    return 0;
}

#include "stdafx.h"
#include <conio.h>
#include <iostream>
#include <Windows.h>
 
using namespace std;
 
#define get_pause() cout << "Press any key to continue..." << endl; getch()
 
int main()
{
    STARTUPINFO si;
    PROCESS_INFORMATION procInfo;
    WCHAR lpcName[] = L"C:\\Users\\User\\Documents\\Visual Studio 2017\\Projects\\SYSTEM_PROG_43\\Debug\\SYSTEM_PROG_43.exe";
    HANDLE hMutex;
 
    hMutex = CreateMutex(NULL, FALSE, L"Demo Mutex");
    if (!hMutex)
    {
        cout << "Error of creating mutex" << endl;
        get_pause();
        return GetLastError();
    }
 
    ZeroMemory(&si, sizeof(STARTUPINFO));
    si.cb = sizeof(STARTUPINFO);
 
    if (!CreateProcess(NULL, lpcName, NULL, NULL, FALSE, 0, NULL, NULL, &si, &procInfo))
    {
        cout << "Error of creating process" << endl;
        get_pause();
        return GetLastError();
    }
 
    for (int i = 0; i < 10; i++)
    {
        WaitForSingleObject(hMutex,INFINITE);
        for (int j = 0; j < 10; j++)
        {
            cout << i << flush;
            Sleep(10);
        }
        cout << endl;
        ReleaseMutex(hMutex);
    }
 
    CloseHandle(hMutex);
 
    WaitForSingleObject(procInfo.hProcess,INFINITE);
 
    CloseHandle(procInfo.hProcess);
    CloseHandle(procInfo.hThread);
    get_pause();
    return 0;
}