Problems with websocket-server while sending/ analyzing data

[georgbuechner]

Some different errors accure:

• Server crashes while analyzing data: segmentation fault
• Server crashes while receiving data (might be connected to user-login, might be the case only when a user with the same name already exists)
• User can't access lobby while audio is analyzing

This might have several reasons which should be checked:

• make sure mutex protect accessing user and connections
• make sure audio-data is received correctly (in the correct order)

[georgbuechner]

While audio is analyzing, the shared-mutex games_ in websocket-server is blocked (as with every in-game action). For this reason, all other in-game actions (like running games) can continue without any problems, but some other actions (all where a unique-lock is applied) are blocked:

• OnClose() after removing connection, has to wait to access game (game->PlayerResigned()) till mutex is unlocked
• Creating host-game (WebsocketServer::m_InitializeGame)
• Updating lobby, or joining a game as a client (WebsocketServer::m_InitializeGame)
• Close-Games must wait till analysis is done.