Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of boost. Click here for the latest Boost documentation.

Class template map_index

boost::interprocess::map_index

Synopsis

// In header: <boost/interprocess/interprocess_fwd.hpp>

template<typename IndexConfig> 
class map_index : public boost::container::map< MapConfig > {
public:
  // construct/copy/destruct
  map_index(segment_manager_base *);

  // public member functions
  void reserve(typename segment_manager_base::size_type);
  void shrink_to_fit();
};

Description

Index type based in boost::interprocess::map. Just derives from boost::interprocess::map and defines the interface needed by managed memory segments

`map_index` public construct/copy/destruct

```
map_index(segment_manager_base * segment_mngr);
```
Constructor. Takes a pointer to the segment manager. Can throw

`map_index` public member functions

```
void reserve(typename segment_manager_base::size_type);
```
This reserves memory to optimize the insertion of n elements in the index
```
void shrink_to_fit();
```
This tries to free previously allocate unused memory.