Berkeley DB

DbEnv::log_get

						#include <db_cxx.h>
						int
						DbEnv::log_get(DbLsn *lsn, Dbt *data, u_int32_t flags);
					

Description

The DbEnv::log_get method implements a cursor inside of the log, retrieving records from the log according to the lsn and flags arguments.

The data field of the data structure is set to the record retrieved, and the size field indicates the number of bytes in the record. See DBT for a description of other fields in the data structure. When multiple threads are using the DbEnv handle concurrently, one of the DB_DBT_MALLOC, DB_DBT_REALLOC, or DB_DBT_USERMEM flags must be specified for any Dbt used for data retrieval.

The flags argument must be set to exactly one of the following values:

• DB_CHECKPOINT The last record written with the DB_CHECKPOINT ...