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    發(fā)布日期: 2023-09-11
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資源簡介

db-4.2.52.tar.gz版本,linux平臺使用

資源截圖

代碼片段和文件信息

/*?Do?not?edit:?automatically?built?by?gen_rec.awk.?*/
#include?“db_config.h“

#ifndef?NO_SYSTEM_INCLUDES
#include?

#include?
#include?
#endif

#include?“db_int.h“
#include?“dbinc/crypto.h“
#include?“dbinc/db_page.h“
#include?“dbinc/db_dispatch.h“
#include?“dbinc/db_am.h“
#include?“dbinc/btree.h“
#include?“dbinc/log.h“
#include?“dbinc/txn.h“

/*
?*?PUBLIC:?int?__bam_split_log?__P((DB?*?DB_TXN?*?DB_LSN?*
?*?PUBLIC:?????u_int32_t?db_pgno_t?DB_LSN?*?db_pgno_t?DB_LSN?*?u_int32_t
?*?PUBLIC:?????db_pgno_t?DB_LSN?*?db_pgno_t?const?DBT?*?u_int32_t));
?*/
int
__bam_split_log(dbp?txnid?ret_lsnp?flags?left?llsn?right?rlsn?indx
????npgno?nlsn?root_pgno?pg?opflags)
DB?*dbp;
DB_TXN?*txnid;
DB_LSN?*ret_lsnp;
u_int32_t?flags;
db_pgno_t?left;
DB_LSN?*?llsn;
db_pgno_t?right;
DB_LSN?*?rlsn;
u_int32_t?indx;
db_pgno_t?npgno;
DB_LSN?*?nlsn;
db_pgno_t?root_pgno;
const?DBT?*pg;
u_int32_t?opflags;
{
DBT?logrec;
DB_ENV?*dbenv;
DB_TXNLOGREC?*lr;
DB_LSN?*lsnp?null_lsn;
u_int32_t?zero?uinttmp?rectype?txn_num;
u_int?npad;
u_int8_t?*bp;
int?is_durable?ret;

dbenv?=?dbp->dbenv;
rectype?=?DB___bam_split;
npad?=?0;

is_durable?=?1;
if?(LF_ISSET(DB_LOG_NOT_DURABLE)?||
????F_ISSET(dbenv?DB_ENV_TXN_NOT_DURABLE)?||
????F_ISSET(dbp?DB_AM_NOT_DURABLE))?{
if?(F_ISSET(dbenv?DB_ENV_TXN_NOT_DURABLE)?&&?txnid?==?NULL)
return?(0);
is_durable?=?0;
}
if?(txnid?==?NULL)?{
txn_num?=?0;
null_lsn.file?=?0;
null_lsn.offset?=?0;
lsnp?=?&null_lsn;
}?else?{
if?(TAILQ_FIRST(&txnid->kids)?!=?NULL?&&
????(ret?=?__txn_activekids(dbenv?rectype?txnid))?!=?0)
return?(ret);
txn_num?=?txnid->txnid;
lsnp?=?&txnid->last_lsn;
}

logrec.size?=?sizeof(rectype)?+?sizeof(txn_num)?+?sizeof(DB_LSN)
????+?sizeof(u_int32_t)
????+?sizeof(u_int32_t)
????+?sizeof(*llsn)
????+?sizeof(u_int32_t)
????+?sizeof(*rlsn)
????+?sizeof(u_int32_t)
????+?sizeof(u_int32_t)
????+?sizeof(*nlsn)
????+?sizeof(u_int32_t)
????+?sizeof(u_int32_t)?+?(pg?==?NULL???0?:?pg->size)
????+?sizeof(u_int32_t);
if?(CRYPTO_ON(dbenv))?{
npad?=
????((DB_CIPHER?*)dbenv->crypto_handle)->adj_size(logrec.size);
logrec.size?+=?npad;
}

if?(!is_durable?&&?txnid?!=?NULL)?{
if?((ret?=?__os_malloc(dbenv
????logrec.size?+?sizeof(DB_TXNLOGREC)?&lr))?!=?0)
return?(ret);
#ifdef?DIAGNOSTIC
goto?do_malloc;
#else
logrec.data?=?&lr->data;
#endif
}?else?{
#ifdef?DIAGNOSTIC
do_malloc:
#endif
if?((ret?=
????__os_malloc(dbenv?logrec.size?&logrec.data))?!=?0)?{
#ifdef?DIAGNOSTIC
if?(!is_durable?&&?txnid?!=?NULL)
(void)__os_free(dbenv?lr);
#endif
return?(ret);
}
}
if?(npad?>?0)
memset((u_int8_t?*)logrec.data?+?logrec.size?-?npad?0?npad);

bp?=?logrec.data;

memcpy(bp?&rectype?sizeof(rectype));
bp?+=?sizeof(rectype);

memcpy(bp?&txn_num?sizeof(txn_num));
bp?+=?sizeof(txn_num);

memcpy(bp?lsnp?sizeof(DB_LSN));
bp?+=?sizeof(DB_LSN);

DB_ASSERT(dbp->log_filename?!=?NULL);
if?(dbp->log

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