What does it mean to write `static void * ptr = &ptr` in objective-c?

static void * ptr = &ptr

static void * capturingstillimagecontext = &capturingstillimagecontext;static void * recordingcontext = &recordingcontext;static void * sessionrunninganddeviceauthorizedcontext = &sessionrunninganddeviceauthorizedcontext;

well, so idea for these constants is to have some unique value, that will not repeat anywhere in the program, but we don't really care about its content.

now, instead of coming up with some random string/number etc, we just create a pointer, and put its address as content, this way it's unique and the code is simple is nice :)