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Diffstat (limited to 'qpid/cpp/src/qpid/linearstore/jrnl/txn_hdr.h')
| -rw-r--r-- | qpid/cpp/src/qpid/linearstore/jrnl/txn_hdr.h | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/qpid/cpp/src/qpid/linearstore/jrnl/txn_hdr.h b/qpid/cpp/src/qpid/linearstore/jrnl/txn_hdr.h deleted file mode 100644 index 94b812ccec..0000000000 --- a/qpid/cpp/src/qpid/linearstore/jrnl/txn_hdr.h +++ /dev/null @@ -1,125 +0,0 @@ -/* - * - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - * - */ - -/** - * \file txn_hdr.h - * - * Qpid asynchronous store plugin library - * - * File containing code for class mrg::journal::txn_hdr (transaction - * record header), used to start a transaction (commit or abort) record. - * - * \author Kim van der Riet - */ - -#ifndef QPID_LEGACYSTORE_JRNL_TXN_HDR_H -#define QPID_LEGACYSTORE_JRNL_TXN_HDR_H - -#include <cstddef> -#include "qpid/legacystore/jrnl/rec_hdr.h" - -namespace mrg -{ -namespace journal -{ - -#pragma pack(1) - - /** - * \brief Struct for transaction commit and abort records. - * - * Struct for DTX commit and abort records. Only the magic distinguishes between them. Since - * this record must be used in the context of a valid XID, the xidsize field must not be zero. - * Immediately following this record is the XID itself which is xidsize bytes long, followed by - * a rec_tail. - * - * Note that this record had its own rid distinct from the rids of the record(s) making up the - * transaction it is committing or aborting. - * - * Record header info in binary format (24 bytes): - * <pre> - * 0 7 - * +---+---+---+---+---+---+---+---+ -+ - * | magic | v | e | flags | | - * +---+---+---+---+---+---+---+---+ | struct hdr - * | rid | | - * +---+---+---+---+---+---+---+---+ -+ - * | xidsize | - * +---+---+---+---+---+---+---+---+ - * v = file version (If the format or encoding of this file changes, then this - * number should be incremented) - * e = endian flag, false (0x00) for little endian, true (0x01) for big endian - * </pre> - * - * Note that journal files should be transferable between 32- and 64-bit - * hardware of the same endianness, but not between hardware of opposite - * entianness without some sort of binary conversion utility. Thus buffering - * will be needed for types that change size between 32- and 64-bit compiles. - */ - struct txn_hdr : rec_hdr - { -#if defined(JRNL_BIG_ENDIAN) && defined(JRNL_32_BIT) - u_int32_t _filler0; ///< Big-endian filler for 32-bit size_t -#endif - std::size_t _xidsize; ///< XID size -#if defined(JRNL_LITTLE_ENDIAN) && defined(JRNL_32_BIT) - u_int32_t _filler0; ///< Little-endian filler for 32-bit size_t -#endif - - /** - * \brief Default constructor, which sets all values to 0. - */ - txn_hdr(): rec_hdr(), -#if defined(JRNL_BIG_ENDIAN) && defined(JRNL_32_BIT) - _filler0(0), -#endif - _xidsize(0) -#if defined(JRNL_LITTLE_ENDIAN) && defined(JRNL_32_BIT) - , _filler0(0) -#endif - {} - - /** - * \brief Convenience constructor which initializes values during construction. - */ - txn_hdr(const u_int32_t magic, const u_int8_t version, const u_int64_t rid, - const std::size_t xidsize, const bool owi): rec_hdr(magic, version, rid, owi), -#if defined(JRNL_BIG_ENDIAN) && defined(JRNL_32_BIT) - _filler0(0), -#endif - _xidsize(xidsize) -#if defined(JRNL_LITTLE_ENDIAN) && defined(JRNL_32_BIT) - , _filler0(0) -#endif - {} - - /** - * \brief Returns the size of the header in bytes. - */ - inline static std::size_t size() { return sizeof(txn_hdr); } - }; - -#pragma pack() - -} // namespace journal -} // namespace mrg - -#endif // ifndef QPID_LEGACYSTORE_JRNL_TXN_HDR_H |