microsoft / microsoft/mimalloc
Return usable allocation size on allocation
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- Dominant language
- C
- Stars
- 13.4k
- Forks
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- Avg merge
- 4d 45m
- Merged PRs (30d)
- 13
Description
jemalloc provides smallocx (e.g. see implementation here: https://github.com/jemalloc/jemalloc/blob/dev/src/jemalloc.c#L3015), which not only returns a pointer to the allocation, but also the size of the allocation size class (that is , the usable allocation size).
It would be nice if for all allocating and resizing operations a similar API could be provided, so that users that might want to use all usable space don't have to query the size class.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading jemalloc's src/jemalloc.c implementation of smallocx linked in the issue, then compare its usable-size return with mimalloc's allocation and resizing APIs. Define the affected allocating and resizing operations and verify that the proposed API exposes usable allocation size consistently; the issue does not name repository files or tests.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- operating-systems
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100