Berkeley DB: DbEnv::set_feedback
Description: Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++

# DbEnv::set_feedback |

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    #include <db_cxx.h>

    int
    DbEnv::set_feedback(
        void (*db_feedback_fcn)(DbEnv *, int opcode, int pct));

# Description

Some operations performed by the Berkeley DB library can take non-trivial amounts of time. The DbEnv::set_feedback method can be used by applications to monitor progress within these operations.

When an operation is likely to take a long time, Berkeley DB will call the db_feedback_fcn method. This method must be declared with three arguments: the first will be a reference to the enclosing environment, the second a flag value, and the third the percent of the operation that has been completed, specified as an integer value between 0 and 100. It is up to the db_feedback_fcn method to display this information in an appropriate manner.

The opcode argument may take on any of the following values:

DB_RECOVER
  The environment is being recovered.

The DbEnv::set_feedback interface may be used to configure Berkeley DB at any time during the life of the application.

### Class

DbEnv

# See Also

DbEnv::close, DbEnv::open, DbEnv::remove, DbEnv::err, DbEnv::strerror, DbEnv::version, DbEnv::set_cachesize, DbEnv::set_errcall, DbEnv::set_errfile, DbEnv::set_error_stream, DbEnv::set_errpfx, DbEnv::set_paniccall, and DbEnv::set_verbose.`

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