//Листинг 6.5. Критическая секция для двух потоков


#include <process.h>
#include <fstream>
#include <vector>
#include <string>

std::vector<std::string> v;
CRITICAL_SECTION fs;
unsigned __stdcall Thread(void* param)
{
   std::ifstream in;
   std::string st;
   EnterCriticalSection(&fs);
   in.open(_T("readme.txt"));
   while (getline(in, st)) v.push_back(st);
   in.close();
   LeaveCriticalSection(&fs);
   InvalidateRect((HWND)param, NULL, TRUE);
   return 0;
}
///////////////////////////////////////////////////////////////////////
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
   HDC hdc;
   PAINTSTRUCT ps;
   std::vector<std::string>::iterator it;
   int y;
   static HANDLE hThread;
   switch (message)
   {
   case WM_CREATE:
      InitializeCriticalSection(&fs);
      hThread = (HANDLE)_beginthreadex(NULL, 0, Thread, hWnd, 0, NULL);
      break;
   case WM_COMMAND:
      switch (LOWORD(wParam))
      {
      case IDM_EXIT: DestroyWindow(hWnd); break;
      default: return DefWindowProc(hWnd, message, wParam, lParam);
      }
      break;
   case WM_PAINT:
      hdc = BeginPaint(hWnd, &ps);
	  EnterCriticalSection(&fs);
      for (y = 0, it = v.begin(); it < v.end(); ++it, y += 16)
         TabbedTextOutA(hdc, 0, y, it->data(), it->length(), 0, NULL, 0);
	  LeaveCriticalSection(&fs);
      EndPaint(hWnd, &ps);
      break;
   case WM_DESTROY: PostQuitMessage(0); break;
   default: return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}