mirror of
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93 lines
2.0 KiB
Plaintext
93 lines
2.0 KiB
Plaintext
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/* Do not edit: automatically built by dist/distrib. */
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#include <sys/queue.h>
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#include <sys/shqueue.h>
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#include <ctype.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include "db_int.h"
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#include "db_page.h"
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#include "../log/log.h"
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#include "log.h"
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#include "../common/db_dispatch.h"
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#include "../common/extern.h"
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/*
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* __log_register_recover --
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* Recovery function for register.
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*
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* PUBLIC: int __log_register_recover
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* PUBLIC: __P((DB_LOG *, DBT *, DB_LSN *, int, void *));
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*/
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int
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__log_register_recover(logp, dbtp, lsnp, redo, info)
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DB_LOG *logp;
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DBT *dbtp;
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DB_LSN *lsnp;
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int redo;
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void *info;
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{
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__log_register_args *argp;
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DB *file_dbp;
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DB_MPOOLFILE *mpf;
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PAGE *pagep;
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int cmp_n, cmp_p, modified, ret;
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#ifdef DEBUG_RECOVER
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(void)__log_register_print(logp, dbtp, lsnp, redo, info);
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#endif
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info = info; /* XXX: Shut the compiler up. */
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if ((ret = __log_register_read(dbtp->data, &argp)) != 0)
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goto out;
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if (__db_fileid_to_db(logp, &file_dbp, argp->fileid)) {
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ret = 0;
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goto out;
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}
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if (file_dbp == NULL)
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goto out;
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F_SET(file_dbp, DB_AM_RECOVER);
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mpf = file_dbp->mpf;
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if ((ret = memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0)
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if (redo) {
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if ((ret = memp_fget(mpf,
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&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
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goto out;
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} else {
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*lsnp = *argp->prev_lsn;
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ret = 0;
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goto out;
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}
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modified = 0;
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cmp_n = log_compare(lsnp, &LSN(pagep));
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/*
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* Use this when there is something like "pagelsn" in the argp
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* structure. Sometimes, you might need to compare meta-data
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* lsn's instead.
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*
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* cmp_p = log_compare(&LSN(pagep), argp->pagelsn);
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*/
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if (cmp_p == 0 && redo) {
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/* Need to redo update described. */
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modified = 1;
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} else if (cmp_n == 0 && !redo) {
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/* Need to undo update described. */
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modified = 1;
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}
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if (ret = memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0))
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goto out;
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*lsnp = *argp->prev_lsn;
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out: if (argp != NULL)
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free (argp);
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F_CLR(file_dbp, DB_AM_RECOVER);
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return (ret);
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}
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