Struct BumpFreeListAllocator 

pub struct BumpFreeListAllocator;

Minimal Bump Pointer + Unordered Free List Allocator.

极简 Bump Pointer + 无序链表分配器。

Features

• Extreme Size: Removes binning and merging logic to minimize code size.
• Fast Startup: No initialization overhead.
• Fragmentation: Does not merge memory, long-running processes will cause OOM. Only suitable for short-lived tasks.

特性

• 极致体积：移除分箱和合并逻辑，代码量最小化。
• 快速启动：无初始化开销。
• 碎片化：不合并内存，长期运行会导致 OOM。仅适用于短生命周期任务。

Implementations

impl BumpFreeListAllocator

pub const fn new() -> Self

impl BumpFreeListAllocator

pub unsafe fn reset()

Testing only: Reset the internal state. Safety: usage is inherently unsafe if allocator is in use.

仅测试用：重置内部状态。 安全性：如果分配器正在使用，未定义的行为。

Trait Implementations

impl GlobalAlloc for BumpFreeListAllocator

unsafe fn alloc(&self, layout: Layout) -> *mut u8

Allocates memory as described by the given layout.

unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout)

Deallocates the block of memory at the given ptr pointer with the given layout.

unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8

Behaves like alloc, but also ensures that the contents are set to zero before being returned.

unsafe fn realloc( &self, ptr: *mut u8, layout: Layout, new_size: usize, ) -> *mut u8

Shrinks or grows a block of memory to the given new_size in bytes. The block is described by the given ptr pointer and layout.

impl Sync for BumpFreeListAllocator

Safety Warning: Allocators in this module are designed for [Single Threaded] environments. Sync is implemented only to satisfy GlobalAlloc trait requirements. Using this allocator in a multi-threaded environment will lead to Undefined Behavior (UB). Please ensure it is used only in single-threaded environments (e.g., WASM or single-threaded embedded).

安全性警示 (Safety Warning): 本模块中的分配器均为【单线程】设计。 实现了 Sync 仅为了满足 GlobalAlloc trait 的要求。 在多线程环境中使用此分配器会导致未定义行为 (UB)。 请确保只在单线程环境（如 WASM 或单线程嵌入式环境）中使用。