readLock<T> method

  1. @override
Future<T> readLock<T>(
  1. Future<T> callback(
    1. SqliteReadContext tx
    ), {
  2. Duration? lockTimeout,
  3. String? debugContext,
})
override

Takes a read lock, without starting a transaction.

The lock only applies to a single SqliteConnection, and multiple connections may hold read locks at the same time.

In most cases, readTransaction should be used instead.

Implementation

@override
Future<T> readLock<T>(Future<T> Function(SqliteReadContext tx) callback,
    {Duration? lockTimeout, String? debugContext}) {
  final task = profileQueries ? TimelineTask() : null;
  task?.start('${profilerPrefix}mutex_lock');

  return mutex.lock(
    () {
      task?.finish();
      return callback(SyncReadContext(db, parent: task));
    },
    timeout: lockTimeout,
  );
}