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add a mutex lock and unlock on Menu instance creation

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This commit is contained in:
Stephen Birarda 2013-11-26 10:58:02 -06:00
parent 7151d1679f
commit ec909a6c13
1 changed files with 7 additions and 0 deletions
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7
interface/src/Menu.cpp
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@ -36,11 +36,18 @@
Menu* Menu::_instance = NULL; Menu* Menu::_instance = NULL;
Menu* Menu::getInstance() { Menu* Menu::getInstance() {
static QMutex menuInstanceMutex;
// lock the menu instance mutex to make sure we don't race and create two menus and crash
menuInstanceMutex.lock();
if (!_instance) { if (!_instance) {
qDebug("First call to Menu::getInstance() - initing menu.\n"); qDebug("First call to Menu::getInstance() - initing menu.\n");
_instance = new Menu(); _instance = new Menu();
} }
menuInstanceMutex.unlock();
return _instance; return _instance;
} }