sqlite3WalUndo 36770 sqlite3/libsqlite/sqlite3.c SQLITE_PRIVATE int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx); sqlite3WalUndo 39730 sqlite3/libsqlite/sqlite3.c rc = sqlite3WalUndo(pPager->pWal, pagerUndoCallback, (void *)pPager);