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1.0.1 (current) Rating: Positive Thoroughness: Low Understanding: Medium

by kpreid on 2024-04-23

Does what it says it does, and what it says it does is sound as far as I know. In fact, the standard library contains the same thing, unstable, under the name std::sync::Exclusive: https://doc.rust-lang.org/1.77.0/std/sync/struct.Exclusive.html So this library can be seen as an interim substitute for that.

The current version of SyncWrapper is 1.0.1.

0.1.1 (older version) Rating: Strong Positive Thoroughness: Medium Understanding: High

by niklasf on 2021-10-16

Reviewed for soundness. There are two instances of unsafe code.

One is a standard pin projection.

The other is the primary purpose of the crate:

unsafe impl Sync for SyncWrapper {}

This is equivalent to the statement that all instances of &SyncWrapper can be safely sent across thread boundaries. This is true, because &SyncWrapper is useless. The crate allows no operations on &SyncWrapper alltogether. The only provided methods require &mut SyncWrapper or owned SyncWrapper.


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The current version of SyncWrapper is 1.0.1.

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safe-to-deploy (implies safe-to-run)

This crate will not introduce a serious security vulnerability to production software exposed to untrusted input. More…

safe-to-run

This crate can be compiled, run, and tested on a local workstation or in controlled automation without surprising consequences. More…

does-not-implement-crypto (implies crypto-safe)

Inspection reveals that the crate in question does not attempt to implement any cryptographic algorithms on its own.

Note that certification of this does not require an expert on all forms of cryptography: it's expected for crates we import to be "good enough" citizens, so they'll at least be forthcoming if they try to implement something cryptographic. When in doubt, please ask an expert.

crypto-safe
Implied by other criteria

All crypto algorithms in this crate have been reviewed by a relevant expert.

Note: If a crate does not implement crypto, use does-not-implement-crypto, which implies crypto-safe, but does not require expert review in order to audit for.

ub-risk-1 (implies ub-risk-2)

Excellent soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-1

ub-risk-2 (implies ub-risk-3)
Implied by other criteria

Negligible unsoundness or average soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-2

ub-risk-3 (implies ub-risk-4)
Implied by other criteria

Mild unsoundness or suboptimal soundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-3

ub-risk-4
Implied by other criteria

Extreme unsoundness.

Full description of the audit criteria can be found at https://github.com/google/rust-crate-audits/blob/main/auditing_standards.md#ub-risk-4

unknown

May have been packaged automatically without a review


Lib.rs has been able to verify that all files in the crate's tarball are in the crate's repository with a git tag matching the version. Please note that this check is still in beta, and absence of this confirmation does not mean that the files don't match.

Crates in the crates.io registry are tarball snapshots uploaded by crates' publishers. The registry is not using crates' git repositories, so there is a possibility that published crates have a misleading repository URL, or contain different code from the code in the repository.

To review the actual code of the crate, it's best to use cargo crev open sync_wrapper. Alternatively, you can download the tarball of sync_wrapper v1.0.1 or view the source online.