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Diffstat (limited to 'cpp/src/qpid/legacystore/jrnl/jcfg.h')
| -rw-r--r-- | cpp/src/qpid/legacystore/jrnl/jcfg.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/cpp/src/qpid/legacystore/jrnl/jcfg.h b/cpp/src/qpid/legacystore/jrnl/jcfg.h new file mode 100644 index 0000000000..0a0d0df28d --- /dev/null +++ b/cpp/src/qpid/legacystore/jrnl/jcfg.h @@ -0,0 +1,91 @@ +/* + * + * 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 |