Access violation in the sample program

[GoogleCodeExporter]

the following function in your sample application causes a access violation, 
because g_broker == 0;

void PaintMainWindow(HDC dc, PAINTSTRUCT* /*ps*/) {
...
  ::wsprintfW(buf, L"worker file calls : %ld", g_broker->GetNumCallsPerArea(Broker::FILES));
...
}

this function is triggered by calling CreateMainWindow in BrokerMain.
The broker instance is created after CreateMainWindow, therefore when 
PaintMainWindow first gets called, g_broker is still empty.

int BrokerMain(HINSTANCE instance, const wchar_t*) {
  HWND win = CreateMainWindow(instance);
  if (!win) {
    return -1;
  }
  Broker broker(win);
  broker.SetPolicy(Broker::FILES, true);
  broker.SpawnWorker(kWorkerCmdline);
  g_broker = &broker;
...
}

This issue is reproducible with vs2012 on win8. for now, I'm doing this:

if (g_broker)
  ::wsprintfW(buf, L"worker file calls : %ld", g_broker->GetNumCallsPerArea(Broker::FILES));

Original issue reported on code.google.com by [email protected] on 1 Oct 2013 at 4:07