| // Copyright 2019 The Chromium Authors |
| // 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. |
| intLock(sqlite3_file* sqlite_file,int file_lock); |
| intUnlock(sqlite3_file* sqlite_file,int file_lock); |
| intCheckReservedLock(sqlite3_file* sqlite_file,int* result); |
| |
| }// namespace sql |
| |
| #endif// SQL_VFS_WRAPPER_FUCHSIA_H_ |
