libsql: Use RwLock instead of RefCell for local connection#2118
Merged
penberg merged 2 commits intotursodatabase:mainfrom Jul 29, 2025
Merged
libsql: Use RwLock instead of RefCell for local connection#2118penberg merged 2 commits intotursodatabase:mainfrom
penberg merged 2 commits intotursodatabase:mainfrom
Conversation
Resonious
changed the title
Resonious
changed the title
The `local::Connection` struct has the following safety comments:
```rust
// SAFETY: This is safe because we compile sqlite3 w/ SQLITE_THREADSAFE=1
unsafe impl Send for Connection {}
// SAFETY: This is safe because we compile sqlite3 w/ SQLITE_THREADSAFE=1
unsafe impl Sync for Connection {}
```
This is correct with respect to the `*mut ffi::sqlite3` field, but NOT
with respect to the `RefCell<Option<AuthHook>>` field. Heavy load in
a real application using local databases occasionally sees panics due
to concurrent access to this RefCell.
penberg
changed the title
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The
local::Connectionstruct has the following safety comments:This is correct with respect to the
*mut ffi::sqlite3field, but NOT with respect to theRefCell<Option<AuthHook>>field. RefCell is not thread safe. Heavy load in a real application using local databases occasionally sees panics due to concurrent access to this RefCell.I don't have a simple repro right now, but this change eliminated the panics for me. Let me know if you'd like some extra work done like a repro or tests (not sure I'll have time but I will try..)