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DbEnv::set_errcall |
#include <db_cxx.h>void DbEnv::set_errcall(void (*db_errcall_fcn) (const Dbenv *dbenv, const char *errpfx, const char *msg));
The DbEnv::set_errcall and Db::set_errcall methods are used to enhance the mechanism for reporting error messages to the application. In some cases, when an error occurs, Berkeley DB will call db_errcall_fcn with additional error information. It is up to the db_errcall_fcn function to display the error message in an appropriate manner.
Setting db_errcall_fcn to NULL unconfigures the callback interface.
Alternatively, you can use the DbEnv::set_error_stream and Db::set_error_stream methods to display the additional information via an output stream, or the Db::set_errfile or DbEnv::set_errfile methods to display the additional information via a C library FILE *. You should not mix these approaches.
This error-logging enhancement does not slow performance or significantly increase application size, and may be run during normal operation as well as during application debugging.
The DbEnv::set_errcall method may be called at any time during the life of the application.
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