hash_auto.c

这是国外的resip协议栈

	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	if (nextlsn != NULL)
		memcpy(bp, nextlsn, sizeof(*nextlsn));
	else
		memset(bp, 0, sizeof(*nextlsn));
	bp += sizeof(*nextlsn);

	uinttmp = (u_int32_t)nnext_pgno;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	if (nnextlsn != NULL)
		memcpy(bp, nnextlsn, sizeof(*nnextlsn));
	else
		memset(bp, 0, sizeof(*nnextlsn));
	bp += sizeof(*nnextlsn);

	if (page == NULL) {
		zero = 0;
		memcpy(bp, &zero, sizeof(u_int32_t));
		bp += sizeof(u_int32_t);
	} else {
		memcpy(bp, &page->size, sizeof(page->size));
		bp += sizeof(page->size);
		memcpy(bp, page->data, page->size);
		bp += page->size;
	}

	DB_ASSERT((u_int32_t)(bp - (u_int8_t *)logrec.data) <= logrec.size);

	if (is_durable || txnid == NULL) {
		if ((ret = __log_put(dbenv, rlsnp,(DBT *)&logrec,
		    flags | DB_LOG_NOCOPY)) == 0 && txnid != NULL) {
			txnid->last_lsn = *rlsnp;
			if (rlsnp != ret_lsnp)
				 *ret_lsnp = *rlsnp;
		}
	} else {
#ifdef DIAGNOSTIC
		/*
		 * Set the debug bit if we are going to log non-durable
		 * transactions so they will be ignored by recovery.
		 */
		memcpy(lr->data, logrec.data, logrec.size);
		rectype |= DB_debug_FLAG;
		memcpy(logrec.data, &rectype, sizeof(rectype));

		ret = __log_put(dbenv,
		    rlsnp, (DBT *)&logrec, flags | DB_LOG_NOCOPY);
#else
		ret = 0;
#endif
		STAILQ_INSERT_HEAD(&txnid->logs, lr, links);
		LSN_NOT_LOGGED(*ret_lsnp);
	}

#ifdef LOG_DIAGNOSTIC
	if (ret != 0)
		(void)__ham_copypage_print(dbenv,
		    (DBT *)&logrec, ret_lsnp, NULL, NULL);
#endif

#ifdef DIAGNOSTIC
	__os_free(dbenv, logrec.data);
#else
	if (is_durable || txnid == NULL)
		__os_free(dbenv, logrec.data);
#endif
	return (ret);
}

/*
 * PUBLIC: int __ham_copypage_read __P((DB_ENV *, void *,
 * PUBLIC:     __ham_copypage_args **));
 */
int
__ham_copypage_read(dbenv, recbuf, argpp)
	DB_ENV *dbenv;
	void *recbuf;
	__ham_copypage_args **argpp;
{
	__ham_copypage_args *argp;
	u_int32_t uinttmp;
	u_int8_t *bp;
	int ret;

	if ((ret = __os_malloc(dbenv,
	    sizeof(__ham_copypage_args) + sizeof(DB_TXN), &argp)) != 0)
		return (ret);
	bp = recbuf;
	argp->txnid = (DB_TXN *)&argp[1];

	memcpy(&argp->type, bp, sizeof(argp->type));
	bp += sizeof(argp->type);

	memcpy(&argp->txnid->txnid,  bp, sizeof(argp->txnid->txnid));
	bp += sizeof(argp->txnid->txnid);

	memcpy(&argp->prev_lsn, bp, sizeof(DB_LSN));
	bp += sizeof(DB_LSN);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->fileid = (int32_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->pgno = (db_pgno_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&argp->pagelsn, bp,  sizeof(argp->pagelsn));
	bp += sizeof(argp->pagelsn);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->next_pgno = (db_pgno_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&argp->nextlsn, bp,  sizeof(argp->nextlsn));
	bp += sizeof(argp->nextlsn);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->nnext_pgno = (db_pgno_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&argp->nnextlsn, bp,  sizeof(argp->nnextlsn));
	bp += sizeof(argp->nnextlsn);

	memset(&argp->page, 0, sizeof(argp->page));
	memcpy(&argp->page.size, bp, sizeof(u_int32_t));
	bp += sizeof(u_int32_t);
	argp->page.data = bp;
	bp += argp->page.size;

	*argpp = argp;
	return (0);
}

/*
 * PUBLIC: int __ham_metagroup_log __P((DB *, DB_TXN *, DB_LSN *,
 * PUBLIC:     u_int32_t, u_int32_t, db_pgno_t, DB_LSN *, db_pgno_t, DB_LSN *,
 * PUBLIC:     db_pgno_t, DB_LSN *, u_int32_t, db_pgno_t));
 */
int
__ham_metagroup_log(dbp, txnid, ret_lsnp, flags, bucket, mmpgno, mmetalsn, mpgno, metalsn,
    pgno, pagelsn, newalloc, last_pgno)
	DB *dbp;
	DB_TXN *txnid;
	DB_LSN *ret_lsnp;
	u_int32_t flags;
	u_int32_t bucket;
	db_pgno_t mmpgno;
	DB_LSN * mmetalsn;
	db_pgno_t mpgno;
	DB_LSN * metalsn;
	db_pgno_t pgno;
	DB_LSN * pagelsn;
	u_int32_t newalloc;
	db_pgno_t last_pgno;
{
	DBT logrec;
	DB_ENV *dbenv;
	DB_TXNLOGREC *lr;
	DB_LSN *lsnp, null_lsn, *rlsnp;
	u_int32_t uinttmp, rectype, txn_num;
	u_int npad;
	u_int8_t *bp;
	int is_durable, ret;

	dbenv = dbp->dbenv;
	COMPQUIET(lr, NULL);

	rectype = DB___ham_metagroup;
	npad = 0;
	rlsnp = ret_lsnp;

	ret = 0;

	if (LF_ISSET(DB_LOG_NOT_DURABLE) ||
	    F_ISSET(dbp, DB_AM_NOT_DURABLE)) {
		is_durable = 0;
	} else
		is_durable = 1;

	if (txnid == NULL) {
		txn_num = 0;
		lsnp = &null_lsn;
		null_lsn.file = null_lsn.offset = 0;
	} else {
		if (TAILQ_FIRST(&txnid->kids) != NULL &&
		    (ret = __txn_activekids(dbenv, rectype, txnid)) != 0)
			return (ret);
		/*
		 * We need to assign begin_lsn while holding region mutex.
		 * That assignment is done inside the DbEnv->log_put call,
		 * so pass in the appropriate memory location to be filled
		 * in by the log_put code.
		*/
		DB_SET_BEGIN_LSNP(txnid, &rlsnp);
		txn_num = txnid->txnid;
		lsnp = &txnid->last_lsn;
	}

	DB_ASSERT(dbp->log_filename != NULL);
	if (dbp->log_filename->id == DB_LOGFILEID_INVALID &&
	    (ret = __dbreg_lazy_id(dbp)) != 0)
		return (ret);

	logrec.size = sizeof(rectype) + sizeof(txn_num) + sizeof(DB_LSN)
	    + sizeof(u_int32_t)
	    + sizeof(u_int32_t)
	    + sizeof(u_int32_t)
	    + sizeof(*mmetalsn)
	    + sizeof(u_int32_t)
	    + sizeof(*metalsn)
	    + sizeof(u_int32_t)
	    + sizeof(*pagelsn)
	    + sizeof(u_int32_t)
	    + 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, &logrec.data)) != 0)
			return (ret);
	} else {
		if ((ret = __os_malloc(dbenv,
		    logrec.size + sizeof(DB_TXNLOGREC), &lr)) != 0)
			return (ret);
#ifdef DIAGNOSTIC
		if ((ret =
		    __os_malloc(dbenv, logrec.size, &logrec.data)) != 0) {
			__os_free(dbenv, lr);
			return (ret);
		}
#else
		logrec.data = lr->data;
#endif
	}
	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);

	uinttmp = (u_int32_t)dbp->log_filename->id;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	uinttmp = (u_int32_t)bucket;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	uinttmp = (u_int32_t)mmpgno;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	if (mmetalsn != NULL)
		memcpy(bp, mmetalsn, sizeof(*mmetalsn));
	else
		memset(bp, 0, sizeof(*mmetalsn));
	bp += sizeof(*mmetalsn);

	uinttmp = (u_int32_t)mpgno;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	if (metalsn != NULL)
		memcpy(bp, metalsn, sizeof(*metalsn));
	else
		memset(bp, 0, sizeof(*metalsn));
	bp += sizeof(*metalsn);

	uinttmp = (u_int32_t)pgno;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	if (pagelsn != NULL)
		memcpy(bp, pagelsn, sizeof(*pagelsn));
	else
		memset(bp, 0, sizeof(*pagelsn));
	bp += sizeof(*pagelsn);

	uinttmp = (u_int32_t)newalloc;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	uinttmp = (u_int32_t)last_pgno;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	DB_ASSERT((u_int32_t)(bp - (u_int8_t *)logrec.data) <= logrec.size);

	if (is_durable || txnid == NULL) {
		if ((ret = __log_put(dbenv, rlsnp,(DBT *)&logrec,
		    flags | DB_LOG_NOCOPY)) == 0 && txnid != NULL) {
			txnid->last_lsn = *rlsnp;
			if (rlsnp != ret_lsnp)
				 *ret_lsnp = *rlsnp;
		}
	} else {
#ifdef DIAGNOSTIC
		/*
		 * Set the debug bit if we are going to log non-durable
		 * transactions so they will be ignored by recovery.
		 */
		memcpy(lr->data, logrec.data, logrec.size);
		rectype |= DB_debug_FLAG;
		memcpy(logrec.data, &rectype, sizeof(rectype));

		ret = __log_put(dbenv,
		    rlsnp, (DBT *)&logrec, flags | DB_LOG_NOCOPY);
#else
		ret = 0;
#endif
		STAILQ_INSERT_HEAD(&txnid->logs, lr, links);
		LSN_NOT_LOGGED(*ret_lsnp);
	}

#ifdef LOG_DIAGNOSTIC
	if (ret != 0)
		(void)__ham_metagroup_print(dbenv,
		    (DBT *)&logrec, ret_lsnp, NULL, NULL);
#endif

#ifdef DIAGNOSTIC
	__os_free(dbenv, logrec.data);
#else
	if (is_durable || txnid == NULL)
		__os_free(dbenv, logrec.data);
#endif
	return (ret);
}

/*
 * PUBLIC: int __ham_metagroup_read __P((DB_ENV *, void *,
 * PUBLIC:     __ham_metagroup_args **));
 */
int
__ham_metagroup_read(dbenv, recbuf, argpp)
	DB_ENV *dbenv;
	void *recbuf;
	__ham_metagroup_args **argpp;
{
	__ham_metagroup_args *argp;
	u_int32_t uinttmp;
	u_int8_t *bp;
	int ret;

	if ((ret = __os_malloc(dbenv,
	    sizeof(__ham_metagroup_args) + sizeof(DB_TXN), &argp)) != 0)
		return (ret);
	bp = recbuf;
	argp->txnid = (DB_TXN *)&argp[1];

	memcpy(&argp->type, bp, sizeof(argp->type));
	bp += sizeof(argp->type);

	memcpy(&argp->txnid->txnid,  bp, sizeof(argp->txnid->txnid));
	bp += sizeof(argp->txnid->txnid);

	memcpy(&argp->prev_lsn, bp, sizeof(DB_LSN));
	bp += sizeof(DB_LSN);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->fileid = (int32_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->bucket = (u_int32_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->mmpgno = (db_pgno_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&argp->mmetalsn, bp,  sizeof(argp->mmetalsn));
	bp += sizeof(argp->mmetalsn);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->mpgno = (db_pgno_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&argp->metalsn, bp,  sizeof(argp->metalsn));
	bp += sizeof(argp->metalsn);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->pgno = (db_pgno_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&argp->pagelsn, bp,  sizeof(argp->pagelsn));
	bp += sizeof(argp->pagelsn);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->newalloc = (u_int32_t)uinttmp;
	bp += sizeof(uinttmp);

	memcpy(&uinttmp, bp, sizeof(uinttmp));
	argp->last_pgno = (db_pgno_t)uinttmp;
	bp += sizeof(uinttmp);

	*argpp = argp;
	return (0);
}

/*
 * PUBLIC: int __ham_groupalloc_log __P((DB *, DB_TXN *, DB_LSN *,
 * PUBLIC:     u_int32_t, DB_LSN *, db_pgno_t, u_int32_t, db_pgno_t,
 * PUBLIC:     db_pgno_t));
 */
int
__ham_groupalloc_log(dbp, txnid, ret_lsnp, flags, meta_lsn, start_pgno, num, free, last_pgno)
	DB *dbp;
	DB_TXN *txnid;
	DB_LSN *ret_lsnp;
	u_int32_t flags;
	DB_LSN * meta_lsn;
	db_pgno_t start_pgno;
	u_int32_t num;
	db_pgno_t free;
	db_pgno_t last_pgno;
{
	DBT logrec;
	DB_ENV *dbenv;
	DB_TXNLOGREC *lr;
	DB_LSN *lsnp, null_lsn, *rlsnp;
	u_int32_t uinttmp, rectype, txn_num;
	u_int npad;
	u_int8_t *bp;
	int is_durable, ret;

	dbenv = dbp->dbenv;
	COMPQUIET(lr, NULL);

	rectype = DB___ham_groupalloc;
	npad = 0;
	rlsnp = ret_lsnp;

	ret = 0;

	if (LF_ISSET(DB_LOG_NOT_DURABLE) ||
	    F_ISSET(dbp, DB_AM_NOT_DURABLE)) {
		is_durable = 0;
	} else
		is_durable = 1;

	if (txnid == NULL) {
		txn_num = 0;
		lsnp = &null_lsn;
		null_lsn.file = null_lsn.offset = 0;
	} else {
		if (TAILQ_FIRST(&txnid->kids) != NULL &&
		    (ret = __txn_activekids(dbenv, rectype, txnid)) != 0)
			return (ret);
		/*
		 * We need to assign begin_lsn while holding region mutex.
		 * That assignment is done inside the DbEnv->log_put call,
		 * so pass in the appropriate memory location to be filled
		 * in by the log_put code.
		*/
		DB_SET_BEGIN_LSNP(txnid, &rlsnp);
		txn_num = txnid->txnid;
		lsnp = &txnid->last_lsn;
	}

	DB_ASSERT(dbp->log_filename != NULL);
	if (dbp->log_filename->id == DB_LOGFILEID_INVALID &&
	    (ret = __dbreg_lazy_id(dbp)) != 0)
		return (ret);

	logrec.size = sizeof(rectype) + sizeof(txn_num) + sizeof(DB_LSN)
	    + sizeof(u_int32_t)
	    + sizeof(*meta_lsn)
	    + sizeof(u_int32_t)
	    + sizeof(u_int32_t)
	    + sizeof(u_int32_t)
	    + 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, &logrec.data)) != 0)
			return (ret);
	} else {
		if ((ret = __os_malloc(dbenv,
		    logrec.size + sizeof(DB_TXNLOGREC), &lr)) != 0)
			return (ret);
#ifdef DIAGNOSTIC
		if ((ret =
		    __os_malloc(dbenv, logrec.size, &logrec.data)) != 0) {
			__os_free(dbenv, lr);
			return (ret);
		}
#else
		logrec.data = lr->data;
#endif
	}
	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);

	uinttmp = (u_int32_t)dbp->log_filename->id;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	if (meta_lsn != NULL)
		memcpy(bp, meta_lsn, sizeof(*meta_lsn));
	else
		memset(bp, 0, sizeof(*meta_lsn));
	bp += sizeof(*meta_lsn);

	uinttmp = (u_int32_t)start_pgno;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	uinttmp = (u_int32_t)num;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	uinttmp = (u_int32_t)free;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	uinttmp = (u_int32_t)last_pgno;
	memcpy(bp, &uinttmp, sizeof(uinttmp));
	bp += sizeof(uinttmp);

	DB_ASSERT((u_int32_t)(bp - (u_int8_t *)logrec.data) <= logrec.size);

	if (is_durable || txnid == NULL) {
		if ((ret = __log_put(dbenv, rlsnp,(DBT *)&logrec,
		    flags | DB_LOG_NOCOPY)) == 0 && txnid != NULL) {
			txnid->last_lsn = *rlsnp;
			if (rlsnp != ret_lsnp)
				 *ret_lsnp = *rlsnp;
		}
	} else {
#ifdef DIAGNOSTIC
		/*
		 * Set the debug bit if we are going to log non-durable
		 * transactions so they will be ignored by recovery.
		 */
		memcpy(lr->data, logrec.data, logrec.size);
		rectype |= DB_debug_FLAG;
		memcpy(logrec.data, &rectype, sizeof(rectype));

		ret = __log_put(dbenv,
		    rlsnp, (DBT *)&logrec, flags | DB_LOG_NOCOPY);
#else
		ret = 0;
#endif
		STAILQ_INSERT_HEAD(&txnid->logs, lr, links);
		LSN_NOT_LOGGED(*ret_lsnp);
	}

#ifdef LOG_DIAGNOSTIC
	if (ret != 0)
		(void)__ham_groupalloc_print(dbenv,
		    (DBT *)&logrec, ret_lsnp, NULL, NULL);
#endif

#ifdef DIAGNOSTIC
	__os_free(dbenv, logrec.data);
#else
	if (is_durable || txnid == NULL)
		__os_free(dbenv, logrec.data);