// Copyright 2019 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef SQL_VFS_WRAPPER_FUCHSIA_H_ #define SQL_VFS_WRAPPER_FUCHSIA_H_ #include "third_party/sqlite/sqlite3.h" namespace sql { // Fuchsia doesn't provide a file locking mechanism like flock(). These // functions are used to simulate file locking. On Fuchsia profile directories // are not expected to be shared with other processes and therefore only one // browser process may access sqlite files. These functions are designed to // handle the case when the same sqlite database is open more than once from the // same browser process. In most cases databases do not need to be open more // than once, i.e. contention is expected to be rare, so the main goal of the // design is simplicity and not performance. The manager maintains a list of all // currently locked files. int Lock(sqlite3_file* sqlite_file, int file_lock); int Unlock(sqlite3_file* sqlite_file, int file_lock); int CheckReservedLock(sqlite3_file* sqlite_file, int* result); } // namespace sql #endif // SQL_VFS_WRAPPER_FUCHSIA_H_