TA memory allocator

TA (Tree Allocator) is a hierarchical memory allocator with destructors.

Essentially it is a wrapper around malloc and related functions. When a parent allocation is freed all child memory allocations are automatically freed too.

Unlike standard malloc, allocation size may be zero, in which case there is an empty allocation which can still be used as a parent for other allocations.

meson setup build
meson compile -Cbuild

References:

• samba talloc
• mpv talloc