http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/htdig_db/txn.h

/*- * See the file LICENSE for redistribution information. * * Copyright (c) 1996, 1997, 1998, 1999 * Sleepycat Software. All rights reserved. * * @(#)txn.h 11.4 (Sleepycat) 10/12/99 */ #ifndef _TXN_H_ #define _TXN_H_ #include "xa.h" struct __db_txnmgr; typedef struct __db_txnmgr DB_TXNMGR; struct __db_txnregion; typedef struct __db_txnregion DB_TXNREGION; /* * !!! * TXN_MINIMUM = (DB_LOCK_MAXID + 1) but this makes compilers complain. */ #define TXN_MINIMUM 0x80000000 #define TXN_INVALID 0xffffffff /* Maximum number of txn ids. */ #define TXN_INVALID_ID 0 /* Invalid transaction ID. */ #define DEF_MAX_TXNS 20 /* Default max transactions. */ /* The structure allocated for every transaction. */ struct __db_txn { DB_TXNMGR *mgrp; /* Pointer to transaction manager. */ DB_TXN *parent; /* Pointer to transaction's parent. */ DB_LSN last_lsn; /* Lsn of last log write. */ u_int32_t txnid; /* Unique transaction id. */ roff_t off; /* Detail structure within region. */ TAILQ_ENTRY(__db_txn) links; /* Links transactions off manager. */ TAILQ_HEAD(__kids, __db_txn) kids; /* Child transactions. */ TAILQ_ENTRY(__db_txn) klinks; /* Links child transactions. */ #define TXN_CHILDCOMMIT 0x01 /* Transaction that has committed. */ #define TXN_MALLOC 0x02 /* Structure allocated by TXN system. */ #define TXN_MUSTFLUSH 0x04 /* A child has committed. */ #define TXN_NOSYNC 0x08 /* Do not sync on prepare and commit. */ #define TXN_NOWAIT 0x10 /* Do not wait on locks. */ #define TXN_SYNC 0x20 /* Sync on prepare and commit. */ u_int32_t flags; }; /* * Internal data maintained in shared memory for each transaction. */ typedef char DB_XID[XIDDATASIZE]; typedef struct __txn_detail { u_int32_t txnid; /* current transaction id used to link free list also */ DB_LSN last_lsn; /* last lsn written for this txn */ DB_LSN begin_lsn; /* lsn of begin record */ roff_t parent; /* Offset of transaction's parent. */ #define TXN_UNALLOC 0 #define TXN_RUNNING 1 #define TXN_ABORTED 2 #define TXN_PREPARED 3 #define TXN_COMMITTED 4 u_int32_t status; /* status of the transaction */ SH_TAILQ_ENTRY links; /* free/active list */ #define TXN_XA_ABORTED 1 #define TXN_XA_DEADLOCKED 2 #define TXN_XA_ENDED 3 #define TXN_XA_PREPARED 4 #define TXN_XA_STARTED 5 #define TXN_XA_SUSPENDED 6 u_int32_t xa_status; /* XA status */ /* * XID (xid_t) structure: because these fields are logged, the * sizes have to be explicit. */ DB_XID xid; /* XA global transaction id */ u_int32_t bqual; /* bqual_length from XID */ u_int32_t gtrid; /* gtrid_length from XID */ int32_t format; /* XA format */ } TXN_DETAIL; /* * DB_TXNMGR -- * The transaction manager encapsulates the transaction system. */ struct __db_txnmgr { /* * These fields need to be protected for multi-threaded support. * * !!! * As this structure is allocated in per-process memory, the mutex may need * to be stored elsewhere on architectures unable to support mutexes in heap * memory, e.g., HP/UX 9. */ MUTEX *mutexp; /* Lock list of active transactions * (including the content of each * TXN_DETAIL structure on the list). */ /* List of active transactions. */ TAILQ_HEAD(_chain, __db_txn) txn_chain; /* These fields are never updated after creation, and so not protected. */ DB_ENV *dbenv; /* Environment. */ REGINFO reginfo; /* Region information. */ int (*recover) /* Recovery dispatch routine */ __P((DB_ENV *, DBT *, DB_LSN *, int, void *)); }; /* * DB_TXNREGION -- * The primary transaction data structure in the shared memory region. */ struct __db_txnregion { u_int32_t maxtxns; /* maximum number of active TXNs */ u_int32_t last_txnid; /* last transaction id given out */ DB_LSN pending_ckp; /* last checkpoint did not finish */ DB_LSN last_ckp; /* lsn of the last checkpoint */ time_t time_ckp; /* time of last checkpoint */ u_int32_t logtype; /* type of logging */ u_int32_t locktype; /* lock type */ u_int32_t naborts; /* number of aborted TXNs */ u_int32_t ncommits; /* number of committed TXNs */ u_int32_t nbegins; /* number of begun TXNs */ u_int32_t nactive; /* number of active TXNs */ u_int32_t maxnactive; /* maximum number of active TXNs */ /* active TXN list */ SH_TAILQ_HEAD(__active) active_txn; }; /* * Make the region large enough to hold N transaction detail structures * plus some space to hold thread handles and the beginning of the shalloc * region. */ #define TXN_REGION_SIZE(N) \ (sizeof(DB_TXNREGION) + N * sizeof(TXN_DETAIL) + 1000) /* * Log record types. */ #define TXN_COMMIT 1 #define TXN_PREPARE 2 #define TXN_CHECKPOINT 3 #include "txn_auto.h" #include "txn_ext.h" #include "xa_ext.h" #endif /* !_TXN_H_ */