Threads em C

/* Este programa exemplifica como fazer a execução de múltiplas funções sequenciais. */

#include <windows.h>
#include <stdio.h>

#define TEMPO_SLEEP 5

HANDLE console; // Handle do console

CRITICAL_SECTION video_CriticalSection; // Garantir acesso exclusivo ao video

void GotoXY(int x, int y )
{
   COORD CurPos;
   CurPos.X = x;
   CurPos.Y = y;
   SetConsoleCursorPosition(console, CurPos);
}

void printJogoDaVelha()
{
     int i, j;
     for (i=5; i<25; i++)
        for (j=3; j<23; j++)
        {
           EnterCriticalSection(&video_CriticalSection);
           GotoXY(i, j);
           printf("#");
           LeaveCriticalSection(&video_CriticalSection);
           Sleep(TEMPO_SLEEP);
        }
}

void printEstrela()
{
     int i, j;
     for (i=25; i<45; i++)
        for (j=3; j<23; j++)

        {
           EnterCriticalSection(&video_CriticalSection);
           GotoXY(i, j);
           printf("*");
           LeaveCriticalSection(&video_CriticalSection);
           Sleep(TEMPO_SLEEP);
        }
}

void printArroba()
{
     int i, j;
     for (i=45; i<65; i++)
        for (j=3; j<23; j++)
        {
           EnterCriticalSection(&video_CriticalSection);
           GotoXY(i, j);
           printf("@");
           LeaveCriticalSection(&video_CriticalSection);
           Sleep(TEMPO_SLEEP);
        }
}

int main()
{
   DWORD tid;

   __int64 freq,start,stop;
   double tempo;


   InitializeCriticalSection(&video_CriticalSection);

   // Handle da consola
   console = GetStdHandle( STD_OUTPUT_HANDLE );
   // Inicia titulo do console
   SetConsoleTitle( "Threads Concorrentes - Prof. Cristiano Lino Felicio" );

   EnterCriticalSection(&video_CriticalSection);
   GotoXY(1, 0);
   printf("--> Exemplo: 3 funcoes (# -- * -- @) executando sequencialmete.\n");
   GotoXY(1, 1);
   printf("--> Pressione alguma tecla para prosseguir ...\n");
   LeaveCriticalSection(&video_CriticalSection);
   getch();

   QueryPerformanceFrequency((LARGE_INTEGER *)&freq);
   QueryPerformanceCounter((LARGE_INTEGER *)&start);

   printJogoDaVelha();
   printEstrela();
   printArroba();

   QueryPerformanceCounter((LARGE_INTEGER *)&stop);
   tempo = ((double)stop-(double)start) / (double)freq;

   EnterCriticalSection(&video_CriticalSection);
   GotoXY(5,23);
   printf("Tempo Total = %f --- ", tempo);
   printf("Pressione alguma tecla para sair.\n");
   LeaveCriticalSection(&video_CriticalSection);

   getch();

   CloseHandle(console);
   DeleteCriticalSection(&video_CriticalSection);
   return 0;
}