Berkeley DB: DbLog::db_unregister
Description: Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,b+tree,btr ee,hash,hashing,transaction,transactions,locking,logging,access method,access me thods,java,C,C++

# DbLog::db_unregister

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    #include <db_cxx.h>

    int
    DbLog::db_unregister(u_int32_t fid);

# Description

The DbLog::db_unregister method disassociates the file name to file identification number mapping for the file identification number specified by the fid parameter. The file identification number may then be reused.

The DbLog::db_unregister method either returns errno or throws an exception that encapsulates an errno on failure, and 0 on success.

# Errors

If a fatal error occurs in Berkeley DB, the DbLog::db_unregister method may fail and either return DB_RUNRECOVERY or throw an exception encapsulating DB_RUNRECOVERY, at which point all subsequent database calls will also fail in the same way. Methods marked as returning errno will, by default, throw an exception that encapsulates the error information. The default error behavior can be changed, see DbException.

The DbLog::db_unregister method may fail and throw an exception for any of the errors specified for the following Berkeley DB and C library functions: abort(3), close(3), dbenv->db_paniccall(3), fcntl(3), fflush(3), fprintf(3), free(3), fsync(3), getenv(3), getpid(3), getuid(3), isdigit(3), lseek(3), malloc(3), memcpy(3), memset(3), open(3), sigfillset(3), sigprocmask(3), snprintf(3), stat(3), strerror(3), strlen(3), time(3), unlink(3), vfprintf(3), vsnprintf(3), and write(3).

In addition, the DbLog::db_unregister method may fail and throw an exception or return errno for the following conditions:

EINVAL
  An invalid flag value or parameter was specified.

# Class

DbLog

# See Also

DbLog::archive, DbLog::close, DbLog::compare, DbLog::file, DbLog::flush, DbLog::get, DbLog::open, DbLog::put, DbLog::db_register, DbLog::stat, DbLog::unlink and DbLog::db_unregister.`