fix: race condition in transaction (#91)

* fix: race condition in transaction

* chore: update package version

* chore: update functions to make testing easier

Author: DominicGBauer

CHANGELOG.md

@@ -1,8 +1,12 @@
 # Changelog
 
+## 1.0.0-BETA13
+
+* Move iOS database driver to use IO dispatcher which should avoid race conditions and improve performance.
+
 ## 1.0.0-BETA12
 
-* Use transaction context in `writeTransaction` in `BucketStorageImpl` to avoid race condition issues in Swift SDK.
+* Use transaction context in `writeTransaction` in `BucketStorageImpl`.
 
 ## 1.0.0-BETA11
 

core/src/iosMain/kotlin/com/powersync/DatabaseDriverFactory.ios.kt

@@ -17,6 +17,8 @@ import kotlinx.cinterop.asStableRef
 import kotlinx.cinterop.staticCFunction
 import kotlinx.cinterop.toKString
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.IO
 
 @Suppress("EXPECT_ACTUAL_CLASSIFIERS_ARE_IN_BETA_WARNING")
 @OptIn(ExperimentalForeignApi::class)
@@ -51,10 +53,13 @@ public actual class DatabaseDriverFactory {
         scope: CoroutineScope,
         dbFilename: String,
     ): PsSqlDriver {
+        val dbDispatcher = Dispatchers.IO
+        val dbScope = CoroutineScope(scope.coroutineContext + dbDispatcher)
+
         val schema = InternalSchema.synchronous()
         this.driver =
             PsSqlDriver(
-                scope = scope,
+                scope = dbScope,
                 driver =
                     NativeSqliteDriver(
                         configuration =

gradle.properties

@@ -17,7 +17,7 @@ development=true
 RELEASE_SIGNING_ENABLED=true
 # Library config
 GROUP=com.powersync
-LIBRARY_VERSION=1.0.0-BETA12
+LIBRARY_VERSION=1.0.0-BETA13
 GITHUB_REPO=https://github.com/powersync-ja/powersync-kotlin.git
 # POM
 POM_URL=https://github.com/powersync-ja/powersync-kotlin/