AcquireArena returns a pooled arena, which is released to the pool on Free.

Alloc allocates a new object and returns a pointer to it.

New returns an empty non-thread-safe arena.

NewFreeList returns a new free list which allocates objects in the given arena.

NewMutexArena returns a new thread-safe arena which uses a mutex to synchronize access.

Arena is an arena allocator, which internally allocates memory in blocks.

FreeList is a linked list of free objects allocated in the arena.

MutexArena is a thread-safe arena which uses a mutex to synchronize access.