void new_thread(void (*run)(void*), void* context);
void insert(BinTree *tree, int key, BinTreeNode *node);
struct allocator { void* (*new)(size_t size, size_t alignment); void (*free)(void* p, size_t size); void* context; }.*
The pie that Spotify divides up among the artists is a global one. It's not like you listen to one artist, so they get your 10 bucks every month. You're paying Taylor Swift, even though you never listen to her.