#include "stdafx.h"
#include "windows.h"

const int NumSlots = 20; 
DWORD g_slots[NumSlots];

// Call this from Main
// This "reserves" the low TLS slots for the CLR.
void AllocateSlots()
{
    for(int i = 0; i < NumSlots; i++)
    {
        g_slots[i] = TlsAlloc();
    }
}

// Call this after your application finishes allocating its own TLS slots, but 
// before you load any managed code.
void FreeSlots()
{
    for(int i =0; i < NumSlots; i++)
    {
        TlsFree(g_slots[i]);
        g_slots[i] = 0;
    }
}


int _tmain(int argc, _TCHAR* argv[])
{

    AllocateSlots();

    // these are exactly like the slots that are allocated by the application.
    DWORD i1 = TlsAlloc();
    DWORD i2 = TlsAlloc();
    DWORD i3 = TlsAlloc();
    DWORD i4 = TlsAlloc();
    
    FreeSlots();

    // ....pretend we load the CLR...
    
    // This should now be a low slot
    DWORD i5 = TlsAlloc();
    

	return 0;
}