Template class that provides the C++ allocator interface for memory pools.
template<typename T> class memory_pool_allocator;
#define TBB_PREVIEW_MEMORY_POOL 1 #include "tbb/memory_pool.h"
A memory_pool_allocator models the allocator requirements described in Table 29 except for default constructor which is excluded from the class. Instead, it provides a constructor, which links with an instance of memory_pool or fixed_pool classes, that actually allocates and deallocates memory. The class is mainly intended to enable memory pools within STL containers.
#define TBB_PREVIEW_MEMORY_POOL 1 #include "tbb/memory_pool.h" ... typedef tbb::memory_pool_allocator<int> pool_allocator_t; std::list<int, pool_allocator_t> my_list(pool_allocator_t( my_pool ));
The code above provides a simple example of cnostruction of a container that uses a memory pool.
namespace tbb {
template<typename T>
class memory_pool_allocator {
public:
typedef T value_type;
typedef value_type* pointer;
typedef const value_type* const_pointer;
typedef value_type& reference;
typedef const value_type& const_reference;
typedef size_t size_type;
typedef ptrdiff_t difference_type;
template<typename U> struct rebind {
typedef memory_pool_allocator<U> other;
};
memory_pool_allocator(memory_pool &pool) throw();
memory_pool_allocator(fixed_pool &pool) throw();
memory_pool_allocator(const memory_pool_allocator& src) throw();
template<typename U>
memory_pool_allocator(const memory_pool_allocator<U,P>& src) throw();
pointer address(reference x) const;
const_pointer address(const_reference x) const;
pointer allocate( size_type n, const void* hint=0);
void deallocate( pointer p, size_type );
size_type max_size() const throw();
void construct( pointer p, const T& value );
void destroy( pointer p );
};
template<>
class memory_pool_allocator<void> {
public:
typedef void* pointer;
typedef const void* const_pointer;
typedef void value_type;
template<typename U> struct rebind {
typedef memory_pool_allocator<U> other;
};
memory_pool_allocator(memory_pool &pool) throw();
memory_pool_allocator(fixed_pool &pool) throw();
memory_pool_allocator(const memory_pool_allocator& src) throw();
template<typename U>
memory_pool_allocator(const memory_pool_allocator<U>& src) throw();
};
template<typename T, typename U>
inline bool operator==( const memory_pool_allocator<T>& a,
const memory_pool_allocator<U>& b);
template<typename T, typename U>
inline bool operator!=( const memory_pool_allocator<T>& a,
const memory_pool_allocator<U>& b);
}
| Member | Description |
|---|---|
| memory_pool_allocator(memory_pool &pool) |
Constructs memory pool allocator serviced by memory_pool instance pool. |
| memory_pool_allocator(fixed_pool &pool) |
Constructs memory pool allocator serviced by fixed_pool instance pool. |