• Added audio stream conversion functions:
  • SDL_NewAudioStream()
  • SDL_AudioStreamPut()
  • SDL_AudioStreamGet()
  • SDL_AudioStreamAvailable()
  • SDL_AudioStreamFlush()
  • SDL_AudioStreamClear()
  • SDL_FreeAudioStream()
• Added functions to query and set the SDL memory allocation functions:
  • SDL_GetMemoryFunctions()
  • SDL_SetMemoryFunctions()
  • SDL_GetNumAllocations()
• Added locking functions for multi-threaded access to the joystick and game controller APIs:
  • SDL_LockJoysticks()
  • SDL_UnlockJoysticks()
• The following functions are now thread-safe:
  • SDL_SetEventFilter()
  • SDL_GetEventFilter()
  • SDL_AddEventWatch()
  • SDL_DelEventWatch()

Fix CVE-2017-2888