libmoost
Public Member Functions
moost::kvds::ConstDbt Struct Reference

User defined data that must NEVER be modified! More...

#include <kvds_bdb_linux.hpp>

List of all members.

Public Member Functions

 ConstDbt (void const *data, size_t size)
void set_data (void const *data)
 Not allowed to set data on this (via c_tor only)!

Detailed Description

User defined data that must NEVER be modified!

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Unfortunately, Dbt only takes non-const pointers. A const cast is required here otherwise we'd have to create local copies of key/data. This should be safe because no modifications are made to key/data unless the semantics of the BDB function being called demand it and in these cases the pointers are non-const anyway.

Below, we encapsulate the three different ways we used Dbt with easy to recognise class names to (a) make the code more readable and (b) to ensure the type of Dbt being used is unequivocally clear. Note, only user memory allocate Dbt allows the data pointer to be changed. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

Definition at line 95 of file kvds_bdb_linux.hpp.

Constructor & Destructor Documentation

moost::kvds::ConstDbt::ConstDbt ( void const *  data,
size_t  size 
) [inline]

Definition at line 97 of file kvds_bdb_linux.hpp.

Member Function Documentation

void moost::kvds::ConstDbt::set_data ( void const *  data)

Not allowed to set data on this (via c_tor only)!

The documentation for this struct was generated from the following file: