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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kStorage
#include "mongo/platform/basic.h"
#include <cstdio>
#include "mongo/db/storage/wiredtiger/wiredtiger_begin_transaction_block.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_util.h"
#include "mongo/util/errno_util.h"
#include "mongo/util/log.h"
namespace mongo {
WiredTigerBeginTxnBlock::WiredTigerBeginTxnBlock(WT_SESSION* session, IgnorePrepared ignorePrepare)
: _session(session) {
invariant(!_rollback);
invariantWTOK(_session->begin_transaction(
_session, (ignorePrepare == IgnorePrepared::kIgnore) ? "ignore_prepare=true" : nullptr));
_rollback = true;
}
WiredTigerBeginTxnBlock::WiredTigerBeginTxnBlock(WT_SESSION* session, const char* config)
: _session(session) {
invariant(!_rollback);
invariantWTOK(_session->begin_transaction(_session, config));
_rollback = true;
}
WiredTigerBeginTxnBlock::~WiredTigerBeginTxnBlock() {
if (_rollback) {
invariant(_session->rollback_transaction(_session, nullptr) == 0);
}
}
Status WiredTigerBeginTxnBlock::setTimestamp(Timestamp readTimestamp, RoundToOldest roundToOldest) {
invariant(_rollback);
char readTSConfigString[15 /* read_timestamp= */ + 16 /* 16 hexadecimal digits */ +
17 /* ,round_to_oldest= */ + 5 /* false */ + 1 /* trailing null */];
auto size = std::snprintf(readTSConfigString,
sizeof(readTSConfigString),
"read_timestamp=%llx,round_to_oldest=%s",
readTimestamp.asULL(),
(roundToOldest == RoundToOldest::kRound) ? "true" : "false");
if (size < 0) {
int e = errno;
error() << "error snprintf " << errnoWithDescription(e);
fassertFailedNoTrace(40664);
}
invariant(static_cast<std::size_t>(size) < sizeof(readTSConfigString));
auto status = wtRCToStatus(_session->timestamp_transaction(_session, readTSConfigString));
return status;
}
void WiredTigerBeginTxnBlock::done() {
invariant(_rollback);
_rollback = false;
}
} // namespace mongo
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