fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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53 lines
1.7 KiB
53 lines
1.7 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "db/snapshot_checker.h"
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#ifdef ROCKSDB_LITE
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#include <assert.h>
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#endif // ROCKSDB_LITE
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#include "port/lang.h"
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#include "utilities/transactions/write_prepared_txn_db.h"
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namespace ROCKSDB_NAMESPACE {
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#ifdef ROCKSDB_LITE
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WritePreparedSnapshotChecker::WritePreparedSnapshotChecker(
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WritePreparedTxnDB* /*txn_db*/) {}
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SnapshotCheckerResult WritePreparedSnapshotChecker::CheckInSnapshot(
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SequenceNumber /*sequence*/, SequenceNumber /*snapshot_sequence*/) const {
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// Should never be called in LITE mode.
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assert(false);
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return SnapshotCheckerResult::kInSnapshot;
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}
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#else
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WritePreparedSnapshotChecker::WritePreparedSnapshotChecker(
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WritePreparedTxnDB* txn_db)
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: txn_db_(txn_db){};
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SnapshotCheckerResult WritePreparedSnapshotChecker::CheckInSnapshot(
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SequenceNumber sequence, SequenceNumber snapshot_sequence) const {
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bool snapshot_released = false;
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// TODO(myabandeh): set min_uncommitted
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bool in_snapshot = txn_db_->IsInSnapshot(
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sequence, snapshot_sequence, kMinUnCommittedSeq, &snapshot_released);
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if (snapshot_released) {
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return SnapshotCheckerResult::kSnapshotReleased;
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}
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return in_snapshot ? SnapshotCheckerResult::kInSnapshot
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: SnapshotCheckerResult::kNotInSnapshot;
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}
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#endif // ROCKSDB_LITE
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DisableGCSnapshotChecker* DisableGCSnapshotChecker::Instance() {
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STATIC_AVOID_DESTRUCTION(DisableGCSnapshotChecker, instance);
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return &instance;
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}
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} // namespace ROCKSDB_NAMESPACE
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