components/sqlite_vfs/multiprocess_test.test-mojom

// Copyright 2026 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module sqlite_vfs.mojom;

import "components/sqlite_vfs/mojom/sqlite_vfs.mojom";

// Interface for read-only operations on the database.
interface ReadOnlyConnection {
  // Tells the child to perform a read operation. Returns the value or a SQLite
  // result code.
  Read() => result<string, int32>;

  // Runs a sequence of reads and returns how many succeeded.
  RunReadSequence(int32 count) => (int32 successful_reads);

  // Closes the database connection, returning the list of all errors
  // encountered while interacting with the database.
  CloseDatabase() => (array<int32> errors);
};

// Interface for read-write operations on the database.
interface ReadWriteConnection {
  // Tells the child to perform a read operation. Returns the value or a SQLite
  // result code.
  Read() => result<string, int32>;

  // Runs a sequence of reads and returns how many succeeded.
  RunReadSequence(int32 count) => (int32 successful_reads);

  // Tells the child to perform a write operation.
  Write(string value) => (bool success);

  // Runs stress test with mixed operations.
  RunStressTest(int32 iterations) => (int32 successful_ops);

  // Forces a checkpoint from the child.
  Checkpoint() => (bool success);

  // Closes the database connection, returning the list of all errors
  // encountered while interacting with the database.
  CloseDatabase() => (array<int32> errors);
};

// Interface for controlling the child process in multi-process tests.
interface SqliteVfsMultiprocessTestHelper {
  // Passes the file set to the child process and opens the database.
  // Returns a remote to the operations interface if successful.
  OpenDatabase(PendingReadWriteFileSet file_set)
      => (pending_remote<ReadWriteConnection>? connection);

  OpenDatabaseReadOnly(PendingReadOnlyFileSet file_set)
      => (pending_remote<ReadOnlyConnection>? connection);
};