/** @see _SnapshotPageArray#beginSnapshot */
Snapshot beginSnapshot(_LocalDatabase db) throws IOException {
mHeaderLatch.acquireShared();
try {
long pageCount, redoPos;
long header = p_alloc(MINIMUM_PAGE_SIZE);
try {
mPageArray.readPage(mCommitNumber & 1, header, 0, MINIMUM_PAGE_SIZE);
pageCount = _PageManager.readTotalPageCount(header, I_MANAGER_HEADER);
redoPos = _LocalDatabase.readRedoPosition(header, I_EXTRA_DATA);
} finally {
p_delete(header);
}
return mPageArray.beginSnapshot(db, pageCount, redoPos);
} finally {
mHeaderLatch.releaseShared();
}
}
