365   sqlite3_mutex *mutex;  in sqlite3_vfs_find()  local
372   mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MAIN);  in sqlite3_vfs_find()
374   sqlite3_mutex_enter(mutex);  in sqlite3_vfs_find()
379   sqlite3_mutex_leave(mutex);  in sqlite3_vfs_find()
409   MUTEX_LOGIC(sqlite3_mutex *mutex;)  in sqlite3_vfs_register()
418   MUTEX_LOGIC( mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MAIN); )  in sqlite3_vfs_register()
419   sqlite3_mutex_enter(mutex);  in sqlite3_vfs_register()
429   sqlite3_mutex_leave(mutex);  in sqlite3_vfs_register()
437   MUTEX_LOGIC(sqlite3_mutex *mutex;)  in sqlite3_vfs_unregister()
442   MUTEX_LOGIC( mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MAIN); )  in sqlite3_vfs_unregister()
443   sqlite3_mutex_enter(mutex);  in sqlite3_vfs_unregister()
445   sqlite3_mutex_leave(mutex);  in sqlite3_vfs_unregister()