Berkeley DB: DbLog::flush
Полезная информация

DbLog::flush


#include <db_cxx.h>

int DbLog::flush(const DbLsn *lsn);

Description

The DbLog::flush method guarantees that all log records whose DbLsn values are less than or equal to the lsn argument have been written to disk. If lsn is NULL, all records in the log are flushed.

The DbLog::flush 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::flush 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::flush 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), unlink(3), vfprintf(3), vsnprintf(3), and write(3).

In addition, the DbLog::flush 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.