DB->set_feedback

API Ref

#include <db.h>

int DB->set_feedback(DB *, void (*db_feedback_fcn)(DB *dbp, int opcode, int percent));


Description: DB->set_feedback

Some operations performed by the Berkeley DB library can take non-trivial amounts of time. The DB->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 specified callback function with progress information.

It is up to the callback function to display this information in an appropriate manner.

The DB->set_feedback method may be called at any time during the life of the application.

The DB->set_feedback method returns a non-zero error value on failure and 0 on success.

Parameters

db_feedback_fcn
The db_feedback_fcn parameter is the application-specified feedback function called to report Berkeley DB operation progress. The callback function must take three parameters:

db
The db parameter is a reference to the enclosing database.

opcode
The opcode parameter is an operation code. The opcode parameter may take on any of the following values:

DB_UPGRADE
The underlying database is being upgraded.

DB_VERIFY
The underlying database is being verified.

percent
The percent parameter is the percent of the operation that has been completed, specified as an integer value between 0 and 100.

Class

DB

See Also

Databases and Related Methods

APIRef

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