Allocation and Freeing

• alloc.c: Main allocation and reallocation functions, including the allocation fast paths.
• alloc-generic.c: Allocation slow path (mi_malloc_generic), page selection, deferred-free callbacks.
• alloc-aligned.c: Aligned allocation and reallocation, including allocations with an alignment offset.
• alloc-posix.c: POSIX, Unix, and Microsoft-compatible allocation interfaces and convenience functions.
• alloc-override.c: Standard allocator and C++ allocation overrides, included by alloc.c.
• free.c: Local and cross-thread freeing, pointer validation, and usable-size queries, included by alloc.c.
• page.c: Allocation-page initialization, free-list management, collection, and retirement.
• page.h: Private declarations for page helpers used by generic allocation.
• page-queue.c: Size-class mapping and management of page queues.
• page-queue.h: Private page-queue declarations and inline helpers.