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- // 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_
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