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Diffstat (limited to 'db2/include/txn.h')
| -rw-r--r-- | db2/include/txn.h | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/db2/include/txn.h b/db2/include/txn.h deleted file mode 100644 index a6fa4db8de..0000000000 --- a/db2/include/txn.h +++ /dev/null @@ -1,148 +0,0 @@ -/*- - * See the file LICENSE for redistribution information. - * - * Copyright (c) 1996, 1997, 1998 - * Sleepycat Software. All rights reserved. - * - * @(#)txn.h 10.18 (Sleepycat) 1/3/99 - */ -#ifndef _TXN_H_ -#define _TXN_H_ - -#include "xa.h" - -/* - * The name of the transaction shared memory region is DEFAULT_TXN_FILE and - * the region is always created group RW of the group owning the directory. - */ -#define DEFAULT_TXN_FILE "__db_txn.share" -/* TXN_MINIMUM = (DB_LOCK_MAXID + 1) but this makes compilers complain. */ -#define TXN_MINIMUM 0x80000000 -#define TXN_INVALID 0xffffffff /* Maximum number of txn ids. */ - -/* - * Transaction type declarations. - */ - -/* - * 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 */ - size_t last_lock; /* offset in lock region of last lock - for this transaction. */ - size_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; - -/* - * The transaction manager encapsulates the transaction system. It contains - * references to the log and lock managers as well as the state that keeps - * track of the shared memory region. - */ -struct __db_txnmgr { -/* These fields need to be protected for multi-threaded support. */ - db_mutex_t *mutexp; /* Synchronization. */ - /* list of active transactions */ - TAILQ_HEAD(_chain, __db_txn) txn_chain; - -/* These fields are not protected. */ - REGINFO reginfo; /* Region information. */ - DB_ENV *dbenv; /* Environment. */ - int (*recover) /* Recovery dispatch routine */ - __P((DB_LOG *, DBT *, DB_LSN *, int, void *)); - u_int32_t flags; /* DB_TXN_NOSYNC, DB_THREAD */ - DB_TXNREGION *region; /* address of shared memory region */ - void *mem; /* address of the shalloc space */ -}; - -/* - * Layout of the shared memory region. - * The region consists of a DB_TXNREGION structure followed by a large - * pool of shalloc'd memory which is used to hold TXN_DETAIL structures - * and thread mutexes (which are dynamically allocated). - */ -struct __db_txnregion { - RLAYOUT hdr; /* Shared memory region header. */ - u_int32_t magic; /* transaction magic number */ - u_int32_t version; /* version number */ - 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 transactions */ - u_int32_t ncommits; /* number of committed transactions */ - u_int32_t nbegins; /* number of begun transactions */ - SH_TAILQ_HEAD(_active) active_txn; /* active transaction list */ -}; - -/* - * 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) - -/* Macros to lock/unlock the region and threads. */ -#define LOCK_TXNTHREAD(tmgrp) \ - if (F_ISSET(tmgrp, DB_THREAD)) \ - (void)__db_mutex_lock((tmgrp)->mutexp, -1) -#define UNLOCK_TXNTHREAD(tmgrp) \ - if (F_ISSET(tmgrp, DB_THREAD)) \ - (void)__db_mutex_unlock((tmgrp)->mutexp, -1) - -#define LOCK_TXNREGION(tmgrp) \ - (void)__db_mutex_lock(&(tmgrp)->region->hdr.lock, (tmgrp)->reginfo.fd) -#define UNLOCK_TXNREGION(tmgrp) \ - (void)__db_mutex_unlock(&(tmgrp)->region->hdr.lock, (tmgrp)->reginfo.fd) - -/* Check for region catastrophic shutdown. */ -#define TXN_PANIC_CHECK(tmgrp) { \ - if ((tmgrp)->region->hdr.panic) \ - return (DB_RUNRECOVERY); \ -} - -/* - * 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_ */ |