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/*
*
* 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 jcfg.h
*
* Qpid asynchronous store plugin library
*
* This file contains \#defines that control the implementation details of
* the journal.
*
* \author Kim van der Riet
*/
#ifndef QPID_LEGACYSTORE_JRNL_JCFG_H
#define QPID_LEGACYSTORE_JRNL_JCFG_H
#if defined(__i386__) /* little endian, 32 bits */
#define JRNL_LITTLE_ENDIAN
#define JRNL_32_BIT
#elif defined(__PPC__) || defined(__s390__) /* big endian, 32 bits */
#define JRNL_BIG_ENDIAN
#define JRNL_32_BIT
#elif defined(__ia64__) || defined(__x86_64__) || defined(__alpha__) /* little endian, 64 bits */
#define JRNL_LITTLE_ENDIAN
#define JRNL_64_BIT
#elif defined(__powerpc64__) || defined(__s390x__) /* big endian, 64 bits */
#define JRNL_BIG_ENDIAN
#define JRNL_64_BIT
#else
#error endian?
#endif
/**
* <b>Rule:</b> Data block size (JRNL_DBLK_SIZE) MUST be a power of 2 such that
* <pre>
* JRNL_DBLK_SIZE * JRNL_SBLK_SIZE == n * 512 (n = 1,2,3...)
* </pre>
* (The disk softblock size is 512 for Linux kernels >= 2.6)
*/
#define JRNL_DBLK_SIZE 128 ///< Data block size in bytes (CANNOT BE LESS THAN 32!)
#define JRNL_SBLK_SIZE 4 ///< Disk softblock size in multiples of JRNL_DBLK_SIZE
#define JRNL_MIN_FILE_SIZE 128 ///< Min. jrnl file size in sblks (excl. file_hdr)
#define JRNL_MAX_FILE_SIZE 4194176 ///< Max. jrnl file size in sblks (excl. file_hdr)
#define JRNL_MIN_NUM_FILES 4 ///< Min. number of journal files
#define JRNL_MAX_NUM_FILES 64 ///< Max. number of journal files
#define JRNL_ENQ_THRESHOLD 80 ///< Percent full when enqueue connection will be closed
#define JRNL_RMGR_PAGE_SIZE 128 ///< Journal page size in softblocks
#define JRNL_RMGR_PAGES 16 ///< Number of pages to use in wmgr
#define JRNL_WMGR_DEF_PAGE_SIZE 64 ///< Journal write page size in softblocks (default)
#define JRNL_WMGR_DEF_PAGES 32 ///< Number of pages to use in wmgr (default)
#define JRNL_WMGR_MAXDTOKPP 1024 ///< Max. dtoks (data blocks) per page in wmgr
#define JRNL_WMGR_MAXWAITUS 100 ///< Max. wait time (us) before submitting AIO
#define JRNL_INFO_EXTENSION "jinf" ///< Extension for journal info files
#define JRNL_DATA_EXTENSION "jdat" ///< Extension for journal data files
#define RHM_JDAT_TXA_MAGIC 0x614d4852 ///< ("RHMa" in little endian) Magic for dtx abort hdrs
#define RHM_JDAT_TXC_MAGIC 0x634d4852 ///< ("RHMc" in little endian) Magic for dtx commit hdrs
#define RHM_JDAT_DEQ_MAGIC 0x644d4852 ///< ("RHMd" in little endian) Magic for deq rec hdrs
#define RHM_JDAT_ENQ_MAGIC 0x654d4852 ///< ("RHMe" in little endian) Magic for enq rec hdrs
#define RHM_JDAT_FILE_MAGIC 0x664d4852 ///< ("RHMf" in little endian) Magic for file hdrs
#define RHM_JDAT_EMPTY_MAGIC 0x784d4852 ///< ("RHMx" in little endian) Magic for empty dblk
#define RHM_JDAT_VERSION 0x01 ///< Version (of file layout)
#define RHM_CLEAN_CHAR 0xff ///< Char used to clear empty space on disk
#define RHM_LENDIAN_FLAG 0 ///< Value of little endian flag on disk
#define RHM_BENDIAN_FLAG 1 ///< Value of big endian flag on disk
#endif // ifndef QPID_LEGACYSTORE_JRNL_JCFG_H
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