SO_Sekcje_Krytyczne

#include <stdio.h>
#include <Windows.h>
#include <conio.h>

#define SIZE 200
#define BIG 8000
volatile char queue[SIZE];
int j = 0;


CRITICAL_SECTION critsection;

DWORD WINAPI th1(void *p)
{
    while (1)
    {
        EnterCriticalSection(&critsection);
        queue[++j] = 'K';
        if (j > SIZE ) j = 0;
        for (int k = 0; k < BIG; k++) {}
        LeaveCriticalSection(&critsection);
    }
}

DWORD WINAPI th2(void *p)
{
    while (1)
    {
        EnterCriticalSection(&critsection);
        queue[++j] = 'X';
        if (j > SIZE ) j = 1;
        for(int k = 0 ; k < BIG ; k++) { }
        LeaveCriticalSection(&critsection);
    }
}

int main()
{
    InitializeCriticalSection(&critsection);

    HANDLE H1 = CreateThread(0, 0, th1, 0, 0, 0);
    HANDLE H2 = CreateThread(0, 0, th2, 0, 0, 0);


    while (!_kbhit())
    {
        for (int i = 0; i < SIZE; i++)
            printf("%c,", queue[i]);
        printf("\n");
        Sleep(1000);
    }

    CloseHandle(H1);
    CloseHandle(H2);
    DeleteCriticalSection(&critsection);

    return 0;
}

/* Wydruk
,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,
K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,K,
K,K,K,K,K,K,K,K,K,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,
X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,
X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,K,K,K,K,K,K,K,K,K,K,K,
*/