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Diffstat (limited to 'db2/include/log.h')
| -rw-r--r-- | db2/include/log.h | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/db2/include/log.h b/db2/include/log.h deleted file mode 100644 index 50309085aa..0000000000 --- a/db2/include/log.h +++ /dev/null @@ -1,204 +0,0 @@ -/*- - * See the file LICENSE for redistribution information. - * - * Copyright (c) 1996, 1997, 1998 - * Sleepycat Software. All rights reserved. - * - * @(#)log.h 10.30 (Sleepycat) 10/11/98 - */ - -#ifndef _LOG_H_ -#define _LOG_H_ - -struct __fname; typedef struct __fname FNAME; -struct __hdr; typedef struct __hdr HDR; -struct __log; typedef struct __log LOG; -struct __log_persist; typedef struct __log_persist LOGP; - -#ifndef MAXLFNAME -#define LFPREFIX "log." /* Log file name prefix. */ -#define LFNAME "log.%010d" /* Log file name template. */ -#define LFNAME_V1 "log.%05d" /* Log file name template, rev 1. */ -#define MAXLFNAME 2000000000 /* Maximum log file name. */ -#endif - /* Default log name. */ -#define DB_DEFAULT_LOG_FILE "__db_log.share" - -#define DEFAULT_MAX (10 * MEGABYTE) /* 10 Mb. */ - -/* Macros to lock/unlock the region and threads. */ -#define LOCK_LOGTHREAD(dblp) \ - if (F_ISSET(dblp, DB_AM_THREAD)) \ - (void)__db_mutex_lock((dblp)->mutexp, -1) -#define UNLOCK_LOGTHREAD(dblp) \ - if (F_ISSET(dblp, DB_AM_THREAD)) \ - (void)__db_mutex_unlock((dblp)->mutexp, -1); -#define LOCK_LOGREGION(dblp) \ - (void)__db_mutex_lock(&((RLAYOUT *)(dblp)->lp)->lock, \ - (dblp)->reginfo.fd) -#define UNLOCK_LOGREGION(dblp) \ - (void)__db_mutex_unlock(&((RLAYOUT *)(dblp)->lp)->lock, \ - (dblp)->reginfo.fd) - -/* Check for region catastrophic shutdown. */ -#define LOG_PANIC_CHECK(dblp) { \ - if ((dblp)->lp->rlayout.panic) \ - return (DB_RUNRECOVERY); \ -} - -/* - * The per-process table that maps log file-id's to DB structures. - */ -typedef struct __db_entry { - DB *dbp; /* Associated DB structure. */ - u_int32_t refcount; /* Reference counted. */ - int deleted; /* File was not found during open. */ -} DB_ENTRY; - -/* - * DB_LOG - * Per-process log structure. - */ -struct __db_log { -/* These fields need to be protected for multi-threaded support. */ - db_mutex_t *mutexp; /* Mutex for thread protection. */ - - DB_ENTRY *dbentry; /* Recovery file-id mapping. */ -#define DB_GROW_SIZE 64 - u_int32_t dbentry_cnt; /* Entries. Grows by DB_GROW_SIZE. */ - -/* - * These fields are always accessed while the region lock is held, so they do - * not have to be protected by the thread lock as well OR, they are only used - * when threads are not being used, i.e. most cursor operations are disallowed - * on threaded logs. - */ - u_int32_t lfname; /* Log file "name". */ - int lfd; /* Log file descriptor. */ - - DB_LSN c_lsn; /* Cursor: current LSN. */ - DBT c_dbt; /* Cursor: return DBT structure. */ - int c_fd; /* Cursor: file descriptor. */ - u_int32_t c_off; /* Cursor: previous record offset. */ - u_int32_t c_len; /* Cursor: current record length. */ - -/* These fields are not protected. */ - LOG *lp; /* Address of the shared LOG. */ - - DB_ENV *dbenv; /* Reference to error information. */ - REGINFO reginfo; /* Region information. */ - - void *addr; /* Address of shalloc() region. */ - - char *dir; /* Directory argument. */ - -/* - * These fields are used by XA; since XA forbids threaded execution, these - * do not have to be protected. - */ - void *xa_info; /* Committed transaction list that - * has to be carried between calls - * to xa_recover. */ - DB_LSN xa_lsn; /* Position of an XA recovery scan. */ - DB_LSN xa_first; /* LSN to which we need to roll back - for this XA recovery scan. */ - - /* - * !!! - * Currently used to hold: - * DB_AM_THREAD (a DB flag) - * DBC_RECOVER (a DBC flag) - * If they are ever the same bits, we're in serious trouble. - */ -#if DB_AM_THREAD == DBC_RECOVER - DB_AM_THREAD, DBC_RECOVER, FLAG MISMATCH -#endif - u_int32_t flags; -}; - -/* - * HDR -- - * Log record header. - */ -struct __hdr { - u_int32_t prev; /* Previous offset. */ - u_int32_t cksum; /* Current checksum. */ - u_int32_t len; /* Current length. */ -}; - -struct __log_persist { - u_int32_t magic; /* DB_LOGMAGIC */ - u_int32_t version; /* DB_LOGVERSION */ - - u_int32_t lg_max; /* Maximum file size. */ - int mode; /* Log file mode. */ -}; - -/* - * LOG -- - * Shared log region. One of these is allocated in shared memory, - * and describes the log. - */ -struct __log { - RLAYOUT rlayout; /* General region information. */ - - LOGP persist; /* Persistent information. */ - - SH_TAILQ_HEAD(__fq) fq; /* List of file names. */ - - /* - * The lsn LSN is the file offset that we're about to write and which - * we will return to the user. - */ - DB_LSN lsn; /* LSN at current file offset. */ - - /* - * The s_lsn LSN is the last LSN that we know is on disk, not just - * written, but synced. - */ - DB_LSN s_lsn; /* LSN of the last sync. */ - - u_int32_t len; /* Length of the last record. */ - - u_int32_t w_off; /* Current write offset in the file. */ - - DB_LSN chkpt_lsn; /* LSN of the last checkpoint. */ - time_t chkpt; /* Time of the last checkpoint. */ - - DB_LOG_STAT stat; /* Log statistics. */ - - /* - * The f_lsn LSN is the LSN (returned to the user) that "owns" the - * first byte of the buffer. If the record associated with the LSN - * spans buffers, it may not reflect the physical file location of - * the first byte of the buffer. - */ - DB_LSN f_lsn; /* LSN of first byte in the buffer. */ - size_t b_off; /* Current offset in the buffer. */ - u_int8_t buf[4 * 1024]; /* Log buffer. */ -}; - -/* - * FNAME -- - * File name and id. - */ -struct __fname { - SH_TAILQ_ENTRY q; /* File name queue. */ - - u_int16_t ref; /* Reference count. */ - - u_int32_t id; /* Logging file id. */ - DBTYPE s_type; /* Saved DB type. */ - - size_t name_off; /* Name offset. */ - u_int8_t ufid[DB_FILE_ID_LEN]; /* Unique file id. */ -}; - -/* File open/close register log record opcodes. */ -#define LOG_CHECKPOINT 1 /* Checkpoint: file name/id dump. */ -#define LOG_CLOSE 2 /* File close. */ -#define LOG_OPEN 3 /* File open. */ - -#include "log_auto.h" -#include "log_ext.h" -#endif /* _LOG_H_ */ |