Add allocated_bytes and total_capacity to allocator types - #7
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Compute usage on demand by walking the chunk linked list: sum of previous chunk capacities (which are ~fully used) plus cursor offset in the current chunk. Zero overhead when not called, and exact once the allocator has warmed up to a single chunk. Exposed on BlinkAlloc, SyncBlinkAlloc, LocalBlinkAlloc, and accessible through Blink via allocator(). Includes 24 tests covering basics, reset, warm-up convergence, approximation error bounds, Vec/Blink adaptor usage, edge cases, and multi-threaded sync allocator tracking.
- Use minimal numbers (item_size=3, item_count=11, initial_chunk=32) - Assert exact values with descriptive failure messages - Add test_tracking_local_proxy showing shared/local interaction - Remove redundant LocalBlinkAlloc doc comments (were copy-paste of BlinkAlloc)
caspark
commented
Feb 13, 2026
| #[cfg(not(feature = "nightly"))] | ||
| use allocator_api2::alloc::{AllocError, Allocator}; | ||
| #[cfg(feature = "nightly")] | ||
| use core::alloc::{AllocError, Allocator}; |
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cargo fmt changes are in a separate commit in case you want to drop them
caspark
commented
Feb 13, 2026
| use crate::SyncBlinkAlloc; | ||
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| /// ChunkHeader has 4 usize fields: cursor, end, prev, cumulative_size. | ||
| const CHUNK_HEADER_SIZE: usize = size_of::<usize>() * 4; |
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would be neater to size_of the header but it would have to be pub(crate) then
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Compute usage on demand by walking the chunk linked list: sum of previous chunk capacities (which are ~fully used) plus cursor offset in the current chunk. The result is exact once the blink allocator has been reset a few times, but is an approximation before then. Having these stats exposed is useful to figure out how much memory is used at various points of a program's execution.