diff options
Diffstat (limited to 'debian/htdig/htdig-3.2.0b6/db/txn.h')
| -rw-r--r-- | debian/htdig/htdig-3.2.0b6/db/txn.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/debian/htdig/htdig-3.2.0b6/db/txn.h b/debian/htdig/htdig-3.2.0b6/db/txn.h new file mode 100644 index 00000000..2bb6fb5b --- /dev/null +++ b/debian/htdig/htdig-3.2.0b6/db/txn.h @@ -0,0 +1,155 @@ +/*- + * 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_ */ |